| "Colleens and Comely Maidens" : Representing and Performing Irish Femininity in the Nineteenth and Twentieth Centuries | O'Connor, Barbara | Article in Book | Syracuse University Press | 2009 |
| "De Bello Clerico" : Fr Batt O'Connor's attack on the evangelical missionaries | O'Reilly, Hugh | Article in Journal | | 2013 |
| "Doesn't Mary have a lovely bottom?": Gender, sexuality and Catholic ideology in 'Father Ted' | McGonigle, Lisa | Article in Journal | | 2012 |
| "It must have been the Irish" - Irish character and colonial engineering : the heroic life (and tragic suicide) of C.Y. O'Connor | Taylor, William M. | Article in Book | Crossing Press | 2000 |
| "Perfidious machiavellian friar" : Florence Conry's campaign for a Catholic restoration in Ireland, 1592-1616 | O'Connor, Thomas | Article in Journal | | 2002 |
| "Petticoat loose" traditions in Ireland | O'Connor, Anne | Article in Journal | | 2002 |
| "Repeal and the suffrage" : Feargus O'Connor's Irish "mission", 1849-50 | Pickering, Paul A. | Article in Book | Merlin | 1999 |
| "Revolting scenes of famine" : Frances Power Cobbe and the Great Hunger | O'Connor, Maureen | Article in Book | Irish Great Hunger Institute Quinnipiac | 2016 |
| "Sentries of British Imperialism"? The question of British-based unions in Ireland | O'Connor, Emmet | Article in Journal | | 2006 |
| "Something solid to put your heel on": Representation and transformation in 'The Bell' | Matthews, Kelly | Article in Journal | | 2011 |
| "The angelic doctor" : Denis Charles O'Connor, M.D., LL.D., 1807-1888 | MacCarthy, C. J. F. | Article in Journal | | 1993 |
| "The cold chain of silence" | O'Connor, Joseph | Article in Journal | | 1957 |
| "The hooligans" of Australia and Cathleen Ní Houlihan : '98 insurgency, song, and clan remembrance | O'Connor, Laura | Article in Book | Crossing Press | 2000 |
| "The king of spring" : the life and times of Peter O'Connor | Quinn, Mark | Article in Journal | | 2008 |
| '315 million of India with Ireland to the last' : Irish and Indian nationalists in North America | Silvestri, Michael | Article in Book | Irish Academic Press | 2006 |
| 'Altman the saltman', Leopold Bloom and James Joyce | O'Connor, Vincent Altman | Article in Journal | | 2017 |
| 'An unique and very curious book': Irish song manuscript RIA 23 F 22 | Carolan, Nicholas | Article in Book | Four Courts Press | 2019 |
| 'Banyan riot of dialectic' : Louis MacNeice's India | Fryatt, Kit | Article in Book | Irish Academic Press | 2006 |
| 'Big Jim' Larkin, the United States and the Easter rising | O'Connor, Emmet | Article in Book | University College Dublin Press | 2016 |
| 'Ears stunned with the din of arms': Belfast volunteer sermons and James Magee | O'Connor, Michael | Article in Journal | | 2011 |
| 'Echoes out of a vast silence': Ancient traditions and folklore | Ó Giolláin, Diarmuid | Article in Book | Four Courts Press | 2019 |
| 'Giant and brutal islanders' : the Italian response to the Irish Papal Brigade | O'Connor, Anne | Article in Book | | 2014 |
| 'Ireland a warning to India' : anti-imperialist solidarity in the Irish Free State | Ní Bheacháin, Caoilfhionn | Article in Book | | 2006 |
| 'Joy's soul lies in the doing': the pleasure of fieldwork | Ní Dhuibhne Almqvist, Éilís | Article in Book | | 2019 |
| 'The Celtic Times' and the early days of the GAA in Wicklow | O'Connor, Tom | Article in Journal | | 2005 |
| 'The Kildare women' : family life, marriage and politics in the early modern period | O'Connor, Carol | Thesis | | 2008 |
| 'The landscape of tradition is constantly changing': five decades of contributions to the understanding of Irish vernacular culture | Fitrzgerald, Kelly | Article in Book | | 2019 |
| 'The lilveliest of the living painters' : women and the visual arts in Ireland | Marshall, Catherine | Article in Book | | 2010 |
| 'The metaphorical Hector' : the literary portrayal of Murchad mac Briain | Ní Mhaonaigh, Máire | Article in Book | | 2014 |
| 'The wind is our confederate' : nation and nature in the work of first-wave Irish feminists | O'Connor, Maureen | Article in Book | | 2020 |
| 'What will we be?' - a spirit of hope distilled | Woods, Vincent | Article in Book | | 2019 |
| 'Where East and West are one' : James Cousins and postcolonial aesthetics | Lennon, Joseph F. | Article in Book | | 2006 |
| 'Women's folklore': traditions of childbirth in Ireland | O'Connor, Anne | Article in Journal | | 2017 |
| 'Wrenching the club from the hand of Hercules' : Classical models for medieval Irish compilatio | Burnyeat, Abigail | Article in Book | | 2014 |
| 100 years of Liberty Hall : papers on the history of SIPTU, given at the Irish Labour History Society Conference, 22 October 2009 | | Monograph or Collective Volume | [SIPTU] | 2013 |
| 8 December 1922: The Mountjoy Executions
Abandoning The Rule of Law: State Executions During the Irish Revolution | Enright, Seán | Article in Book | | 2022 |
| 84 Douglas Street, Cork | Ruane, Pat | Article in Journal | | 2012 |
| A 'True Believer' - Joseph O'Connor imagining Dublin in the second half of the twentieth century | Saá, José Manuel Estévez | Article in Book | Universidad de Valladolid | 2008 |
| A ballad of William Tirry : an Augustinian friar, 1609-54 | O'Connor, John | Monograph or Collective Volume | Augustinian Community | 1976 |
| A brief history of the meteorological service | O'Connor, Dermot | Article in Book | | 1987 |
| A catalogue and atlas of the caddisflies (trichoptera) of Ireland | O'Connor, James P. | Monograph or Collective Volume | The Irish Biogeographical Society | 2015 |
| A civil service career - some reflections | O'Connor, Tom | Article in Journal | | 1990 |
| A comedy of "heirs" : the estate of John O'Connor | Cox, Lori | Article in Journal | | 1990 |
| A comparative study of local government in Tuam and Armagh 1840-1940 | O'Connor, Gabriel Charles | Thesis | | 2004 |
| A displaced intelligentsia : aspects of Irish Catholic thought in ancien régime France | Chambers, Liam | Article in Book | | 2001 |
| A fractured dream : Professor James Lucey Ahern of Waterford - his life and times | O'Connor Quinn, Rosemarie | Monograph or Collective Volume | A & A Farmar | 2015 |
| A glimpse of Killarney town during the visit of Queen Victoria, August 1861 | McCarthy, DanielO'Connor, Michael | Article in Journal | | 2013 |
| A golden treasury of Irish poetry A.D. 600 to 1200 | | Monograph or Collective Volume | Macmillan | 1967 |
| A Greek stele in Dublin | Cook, B. F.O'Connor, Cynthia | Article in Journal | | 1981 |
| A guide to tracing your Kerry ancestors | O'Connor, Michael | Monograph or Collective Volume | Flyleaf | 1990 |
| A headstone for Patsy O'Connor: Fianna scout & forgotten Lockout martyr | Walsh-McLean, Jason | Article in Journal | | 2016 |
| A historiography of Irish labour | O'Connor, Emmet | Article in Journal | | 1995 |
| A history of Galway County Council = Stair Chomhairle Chontae na Gaillimhe | O'Connor, Gabriel | Monograph or Collective Volume | Galway County Council | 1999 |
| A history of Irish thought | Duddy, Thomas | Monograph or Collective Volume | Routledge | 2002 |
| A history of the glorious struggle (review article) | O'Connor, Emmet | Article in Journal | | 1992 |
| A hundred years of Irish migration to France, 1590-1688 | Ó Ciosáin, Éamon | Article in Book | | 2001 |
| A justification for foreign intervention in early modern Ireland | O'Connor, Thomas | Article in Book | | 2003 |
| A Labour history of Ireland, 1824-1960 | O'Connor, Emmet | Monograph or Collective Volume | | 1992 |
| A labour history of Waterford | O'Connor, Emmet | Monograph or Collective Volume | Waterford Council of Trade Unions | 1989 |
| A life in linenopolis : the memoirs of William Topping, Belfast, damask weaver, 1903-56 | O'Connor, Emmet,Parkhill, TrevorTopping, William, | Monograph or Collective Volume | Ulster Historical Foundation | 1992 |
| A look at Stillorgan Brewery | O'Connor, Anne | Article in Journal | | 2011 |
| A look at Stillorgan in the nineteenth century | O'Connor, Anne | Article in Journal | | 2009 |
| A lost landscape : the Geraldine castles and tower houses of the Shannon estuary | Mac Curtain, Margaret | Article in Book | | 1988 |
| A message from heaven : the life and crimes of Father Seán Fortune | O'Connor, Alison | Monograph or Collective Volume | Brandon | 2000 |
| A musicscape from the early nineteenth century | Williams, Fionnuala Carson | Article in Book | | 2019 |
| A new religion, literary study and elementary educaiton in India and Ireland | Parsons, Cóilín | Article in Book | | 2006 |
| A notable convert | O'Connor, R. F. | Article in Journal | | 1914 |
| A picturesque agitator | Mac Lochlainn, Alf, 1926-- | Article in Journal | | 1955 |
| A place of genius and gentility : insights into our past, Kilkerrin, Co. Galway : historical essays on a North Galway parish | | Monograph or Collective Volume | Oidhreacht Chill Choirín | 2006 |
| A poem of prophecy on Ua Conchobair kings of Connacht | Ó Cuív, Brian | Article in Journal | | 1987 |
| A priest on the run : William Tirry, OSA, 1608-1654 | O'Connor, John | Monograph or Collective Volume | Veritas | 1992 |
| A projected invasion of Ireland in 1811 | Ryan, F. W. | Article in Journal | | 1950 |
| A Rathmore man who fought and died in 1916 | Hickey, John | Article in Journal | | 1989 |
| A rebel schoolmaster | Brady, John, d.1963 | Article in Journal | | 1942 |
| A rough guide to the British Empire : Charles, Lord Cornwallis and his years in America, India and Ireland | Dix, Dermot | Article in Book | | 2006 |
| A Saorstat is born : how the Irish Free State came into being | O'Connor Lysaght, D. R. | Article in Book | | 1991 |
| A Saorstát is born : how the Irish Free State came into being | Lysaght, D. R. O'Connor | Article in Book | | 1991 |
| A shared childhood : the story of the integrated schools in Northern Ireland | O'Connor, Fionnuala | Monograph or Collective Volume | Blackstaff Press | 2002 |
| A short history of Irish literature : a backward look | O'Connor, Frank | Monograph or Collective Volume | [s.n.] | 1967 |
| A souring of friendships? Internal divisions in the leadership of the Irish Parliamentary Party in the aftermath of the Easter rising | Mulvagh, Conor | Article in Book | | 2015 |
| A terrible beauty is born : the Irish troubles, 1912-22 | O'Connor, Ulick | Monograph or Collective Volume | Hamilton | 1975 |
| A theology thesis defended by an Irish clerical student in Paris in 1739 | | Article in Journal | | 1997 |
| A tour of Clare, 1950 | O'Connor, Frank [pseudonym of O'Donovan, Michael] | Article in Book | | 1998 |
| A troubled sky : reflections on the Irish educational scene, 1957-68 | O'Connor, Seán | Monograph or Collective Volume | St Patrick's College, Educational Research Centre | 1986 |
| A village incident | O'Connor, Declan | Article in Journal | | 2007 |
| A vision concerning Hugh O'Connor (d. 1309) | O'Dwyer, PeterUí Dhálaigh, Mac Cearbhaill Bhuidhe | Article in Journal | | 1945 |
| A vision concerning Hugh O'Connor (d. 1309) | O'Dwyer, Peter | Article in Journal | | 1946 |
| A voyage into Catholicism : Irish travel to Italy in the nineteenth century | O'Connor, Anne | Article in Journal | | 2016 |
| A woman of Aran; the life and times of Bridget Dirrane | Dirrane, BridgetMahon, JackO'Connor, Rose | Monograph or Collective Volume | Blackwater | 1997 |
| A. E. : a portrait | O'Connor, Frank | Article in Journal | | 1940 |
| Abortion : myths and realities from the Irish folk tradition | O'Connor, Anne | Article in Book | | 1992 |
| Active sabotage in industrial conflict, 1917-23 | O'Connor, Emmet | Article in Journal | | 1985 |
| Administration in Tuam before 1840 | O'Connor, Gabriel | Article in Journal | | 2004 |
| Agrarian unrest and the labour movement in county Waterford 1917-23 | O'Connor, Emmet | Article in Journal | | 1980 |
| Agrarian unrest and the labour movement in county Waterford, 1917-1923 | O'Connor, Emmet | Article in Journal | | 1980 |
| Agricultural output in the Irish Free State area before and after independence | Guiomard, C.O'Connor, R. | Article in Journal | | 1985 |
| Agriculture and other natural resources | O'Connor, Robert | Article in Book | | 1986 |
| Alien family : The impact of the Aliens Act 1935 and subsequent Orders on the family in Ireland, 1933–1945 | O'Connor, Siobhan | Article in Journal | | 2008 |
| All Ireland is in and about Rathkeale | O'Connor, Patrick J. | Monograph or Collective Volume | Oireacht na Mumhan Books | 1996 |
| All the Olympians : a biographical portrait of the Irish literary renaissance | O'Connor, Ulick | Monograph or Collective Volume | [s.n.] | 1984 |
| All worlds possible : the domain of the Millers of Coolybrown | O'Connor, Patrick J. | Monograph or Collective Volume | Oireacht na Mumhan Books | 1993 |
| Alma agus Jeremiah Curtin i gConamara | Bourke, Angela | Article in Book | | 2019 |
| America called : the Helen Hackett Gallery and the Irish art rooms, 1924-1934 | O'Connor, Éimear | Article in Journal | | 2011 |
| American film actress Mary Pickford visited Ballyduff in June 1995 | O'Connor, Noel | Article in Journal | | 1999 |
| An 18th century plan of Newcastle | O'Connor, P. J. | Article in Journal | | 1981 |
| An age of agitation | O'Connor, Emmet | Article in Journal | | 1983 |
| An ascendancy and its vampires. | Lysaght, D.R. O'Connor | Article in Journal | | 2012 |
| An Craobhín Aoibhinn ina bhailitheoir óg béaloidis: fianaise ó nótaí i Lámhscríbhinn G 1070 i Leabharlann Náisiúnta na hÉireann | Mac Mathúna, Liam | Article in Book | | 2019 |
| An early Elizabethan treatise on Laois and Offaly: Cormac mac Briain Í Chonchubhair's 'Device for the Government of Ireland' (c.1565) | Heffernan, David | Article in Journal | | 2015 |
| An early historic period burial at Macetown, Tara, Co Meath | O'Connor, Nessa | Article in Journal | | 1996 |
| An eighteenth century plan of Newcastle | O'Connor, Patrick J. | Article in Journal | | 1981 |
| An eighteenth-century land surveyor and Newcastle | O'Connor, Patrick | Article in Journal | | 1987 |
| An Inaugural Ode to Hugh O’Connor (king of Connacht 1293—1309)? | Mac Mathúna, Séamus | Article in Journal | | 1997 |
| An Irish family between assimilation and revolution : the Keatings of Poitiers, 1777-1795 | Jahan, Sébastien | Article in Book | | 2003 |
| An Irish Jansenist in seventeenth-century France : John Callaghan 1605-54 | O'Connor, Thomas | Monograph or Collective Volume | National University of Ireland | 2005 |
| An Irish missionary in India : Thomas Gavan Duffy and 'The Catechist of Kil-Arni' | Bateman, Fiona | Article in Book | | 2006 |
| An Irish theologian in enlightenment France : Luke Joseph Hooke, 1714-96 | O'Connor, Thomas | Monograph or Collective Volume | Columba | 1995 |
| An Leana Mór : from woodland to townland on the Trinity College estate | O'Connor, Michael | Article in Journal | | 1993 |
| An only child | O'Connor, Frank | Monograph or Collective Volume | Macmillan | 1961 |
| An táilliúracht trí shúile na bprintíseach: dhá chuntas ón naoú haois déag | de Cléir, Síle | Article in Book | | 2019 |
| An tÉirí Amach sa domhan thoir : mar a chonaic an tSeapáin, an tSín agus an Chóiré éirí amach na Cásca is a thionchar | O'Connor, Peter | Monograph or Collective Volume | Coiscéim | 2016 |
| An uncommon under-secretary : Sir Anthony MacDonnell, India and Ireland | Brillman, M. L. | Article in Book | | 2006 |
| An unexpected visitor : Cosimo de' Medici's visit to Cork in 1669 | O'Connor, Anne | Article in Journal | | 2006 |
| Andrew MacDonagh : the Irish Monte-Cristo | Joannon, Pierre | Article in Book | | 2006 |
| Andrew O'Connor, 1874-1941 : a complementary catalogue to the exhibition marking the centenary of the sculptor's birth, Trinity College, Dublin, September 1974 | Potterton, Homan | Monograph or Collective Volume | [s.n.] | 1974 |
| Anglo-Norman relations with Connacht, 1169-1224 | Edwards, R. W. D. (Robert Walter Dudley) | Article in Journal | | 1938 |
| Anne Jellicoe | O'Connor, Anne V. | Article in Book | | 1995 |
| Apotheosis and crisis : the Irish diaspora in the age of Choiseul | Cullen, L. M. (Louis Michael) | Article in Book | | 2006 |
| Appraising F[eargus] O'Connor | Haraszti, É. H. | Article in Journal | | 1967 |
| Archaeological discoveries during urban renewal in Kilmallock | O'Connor, John | Article in Journal | | 2000 |
| Archaeological sites of interest surrounding Turoe Stone | Jordan, KieranO'Connor, Tom | Article in Journal | | 2003 |
| Archbishop Hughes and the question of Ireland, 1829-1862 | O'Connor, Charles P. | Article in Journal | | 1989 |
| Ardfert : a hurling history | O'Connor, Tommy | Monograph or Collective Volume | St Brendan's Hurling Club | 1988 |
| Ardfert church 150 : a history of St. Brendan's church, Ardfert, Co. Kerry, 1855-2005 | O'Connor, Tommy | Monograph or Collective Volume | Foilseacháin Bréanainn | 2005 |
| Ardfert in times past : a history of Ardfert parish, Co. Kerry from earliest times | O'Connor, Tommy | Monograph or Collective Volume | The author | 1999 |
| Aristotle, Greco-Roman imagery, and the Irish in Europe : the classical context in the seventeenth century | Mc Laughlin, Gráinne | Article in Book | | 2010 |
| Art, Ireland, and the Irish diaspora : Chicago, Dublin, New York, 189301939 : culture, connections, controversies | O'Connor, Éimear | Monograph or Collective Volume | Irish Academic Press | 2020 |
| Arthur O'Connor | MacDermott, F. | Article in Journal | | 1966 |
| Arthur O'Connor : the most important Irish revolutionary you may never have heard of | Conner, Clifford D. | Monograph or Collective Volume | iUniverse, Incorporated | 2009 |
| Arthur O'Connor, United Irishman | Hayter-Hames, Jane | Monograph or Collective Volume | Collins Press | 2001 |
| Article 50 of Búnreacht na hÉireann and the unwritten English Constitution of Ireland | O'Connor, J. F. | Article in Book | | 1983 |
| Aspects of Galway postal history, 1638-1984 | O'Connor, Jim | Article in Journal | | 1992 |
| Aspects of the geology and geography of south Cavan and Monaghan | O'Connor, Eugene | Article in Journal | | 2022 |
| Aspects of the literary activity of the Irish Franciscans in Prague, 1620-1786 | Mac Craith, MícheálWorthington, David | Article in Book | | 2003 |
| Aspects of the role of the Holy Office in Irish church affairs in the early seventeenth century | O'Connor, Thomas | Article in Book | | 2009 |
| Atlas of Irish place-names | O'Connor, Patrick | Monograph or Collective Volume | Oireacht na Mumhan Books | 2001 |
| Back to the future of Irish studies : festschrift for Tadhg Foley | | Monograph or Collective Volume | Peter Lang | 2010 |
| Ballinamona Creamery 1928-2003 | O'Connor, Jim | Article in Journal | | 2003 |
| Ballinora GAA : under the dropping ball : how the GAA creates belonging in Ballinora | O'Connor, Michael | Monograph or Collective Volume | Ballinora GAA | 2006 |
| Ballyduff branch of the Pioneer Total Abstinence Association 1947-1962 | O'Connor, Noel | Article in Journal | | 2003 |
| Ballyduff in the 20th century | O'Connor, Noel | Article in Journal | | 1999 |
| Ballyhaunis Friary : [St Mary's Abbey founded c. 1400] | O'Connor, John | Monograph or Collective Volume | Greensprint | 1996 |
| Bandon railway station in the 1950s | O'Connor, Eddie | Article in Journal | | 1998 |
| Beaufield and its people | O'Connor, Anne | Article in Journal | | 2016 |
| Behind the legend : Waterford men in the International Brigades in the Spanish civil war | O'Connor, Emmet | Article in Journal | | 2005 |
| Bernard Connor physician to the King of Poland | Mac Mahon, Bryan | Article in Journal | | 2007 |
| Betty Sinclair | Smylie, Patrick | Article in Book | | 2016 |
| Beyond cradle and grave : Irish folklore about the spirits of unbaptized infants and the spirits of women who murdered babies | O'Connor, Anne | Article in Book | | 2012 |
| Big Jim Larkin : hero and wrecker | O'Connor, Emmet | Article in Journal | | 2013 |
| Big Jim Larkin : hero or wrecker? | O'Connor, Emmet | Monograph or Collective Volume | University College Dublin Press | 2015 |
| Bishop Eugene of Ardmore revisited | O'Connor, Donal | Article in Journal | | 2007 |
| Bishop Malchus : his arrival in Lismore, and the Winchester saints in a Waterford Calendar | O'Connor, Donal | Article in Journal | | 2006 |
| Blake, Bourke and the end of empires | O'Connor, Kevin | Monograph or Collective Volume | Prendeville Publications | 2003 |
| Blessed Oliver Plunket | O'Connor, R. F. | Article in Journal | | 1924 |
| Bobby Burke | Varley, Tony | Article in Book | | 2016 |
| Bodily harm | O'Connor, Marie | Article in Book | | 2016 |
| Bodily harm: symphysiotomy and pubiotomy in Ireland, 1944-92 | O'Connor, Marie | Monograph or Collective Volume | Evertype | 2011 |
| Bolshevising Irish communism : the Communist International and the formation of the Revolutionary Workers' groups 1927-31 | O'Connor, Emmet | Article in Journal | | 2003 |
| Bonaventure O'Connor Kerry : a seventeenth-century Franciscan abroad | Giblin, Cathaldus | Article in Journal | | 1984 |
| Boston Catholics : a history of the church and its people | O'Connor, Thomas H., 1922-2012 | Monograph or Collective Volume | Northeastern University Press | 1998 |
| Bourke's dramatis personae | O'Connor, Eimear | Article in Journal | | 2010 |
| Breaking the bonds : making peace in Northern Ireland | O'Connor, Fionnuala | Monograph or Collective Volume | Mainstream | 2002 |
| Brendan Behan | O'Connor, Ulick | Monograph or Collective Volume | [s.n.] | 1993 |
| Brendan Corish | Desmond, Barry | Article in Book | | 2016 |
| Bringing it all back home : the influence of Irish music at home and overseas | O'Connor, Nuala | Monograph or Collective Volume | Merlin | 2001 |
| British imperialism in Ireland | Lysaght, D. R. O'Connor | Article in Book | | 1980 |
| Brother Paul James O'Connor (1796-1878) | Ruane, Kevin | Article in Journal | | 1992 |
| Bryan F. Beirne MRIA, FRES, FLS, FZS, FESC (1918-1998) | O'Connor, J.P. | Article in Journal | | 2000 |
| Burke's Irish history - a hypothesis | Weston, J. C. | Article in Journal | | 1962 |
| Buttevant's not-so-hidden history: the town's medieval defences revealed | Cotter, EamonnLong, PatriciaO'Connor, John | Article in Book | | 2016 |
| C.Y. O'Connor and the goldfields water supply | Morling, Loreley A. | Article in Journal | | 1993 |
| Can Lily O'Shea come out to play? | O'Connor, Lily | Monograph or Collective Volume | Brandon | 2000 |
| Caolmhóin : láthair Chatha i a Contae Thiobraid Árann | Ó Murchadha, Diarmuid | Article in Journal | | 2007 |
| Captain Rock | Dunne, Terry | Article in Book | | 2016 |
| Captain Rock | Dunne, Terry | Article in Book | | 2016 |
| Caribbean slave owners & other lesser-known histories from County Mayo | O'Connor, Michael M. | Monograph or Collective Volume | Michael M. O'Connor | 2021 |
| Case Study – Unfinished Business in Post-Civil War Ireland: The repatriation of Fr Albert Bibby and Fr Dominic O’Connor | Borgonovo, John | Article in Book | Cork University Press | 2024 |
| Castles and deer parks in Anglo-Norman Ireland | Murphy, MargaretO'Connor, Kieran | Article in Journal | | 2006 |
| Catalogue of the O'Conor papers | Dunleavy, G. W. (Gareth W.)Dunleavy, J. E. (Janet Egleson) | Article in Journal | | 1973 |
| Catherine Mahon | Ní Chuinneagáin, Síle | Article in Book | | 2016 |
| Catholic and Protestant Dublin weavers before the Spanish Inquisition, 1745-54 | O'Connor, Thomas | Article in Book | | 2016 |
| Catholic archives of the United States | O'Connor, Thomas F. | Article in Journal | | 1946 |
| Centenary article. 1907: a titanic year for Belfast labour | O'Connor, Emmet | Article in Journal | | 2007 |
| Centenary memories of Kevin O'Higgins' Family | Logue, Rose Mary | Article in Journal | | 2023 |
| Charles Stewart Parnell. A memory | O'Connor, T. P. | Monograph or Collective Volume | | 1891 |
| Child murdress and dead children traditions : a comparative survey | O'Connor, Anne | Article in Journal | | 1991 |
| Christ the King - the long journey to Haigh Terrace | Smith, Brian | Article in Journal | | 2006 |
| Church, state and women : the aftermath of partition | O'Dowd, Liam | Article in Book | | 1987 |
| Cill Íde : a social and sporting history of the parish of Killeedy | O'Connor, David | Monograph or Collective Volume | Killeedy GAA Publications | 1997 |
| Citizenship education in divided societies : teachers' perspectives in Northern Ireland | Niens, UlrikeO'Connor, UnaSmith, Alan | Article in Journal | | 2013 |
| Class struggle during the Irish war of independence and civil war, 1916-1924 | Lysaght, Daniel Rayner O'Connor | Thesis | | 1982 |
| Classical literature and learning in medieval Irish narrative | | Monograph or Collective Volume | Boydell & Brewer | 2014 |
| Cloonfush, County Galway | O'Connor, Gabriel | Article in Book | | 1998 |
| Cloonkeen Leananode : the rebirth of a rural townland on the former Digby Estate | Keane, Helen G. | Article in Book | | 2006 |
| College communities abroad : Education, migration and Catholicism in early modern Europe | | Monograph or Collective Volume | Manchester University Press | 2017 |
| Colonel Gray : pioneer of the west | O'Connor, Richard C. | Article in Journal | | 1911 |
| Colonel John FitzGerald, the Volunteers and military at Glin in the late eighteenth century | O'Connor, Stephen | Article in Book | | 2009 |
| Comhluadar deighilte : coimhlint in Collège des Lombards, Paris (1707-1752) | O'Connor, Priscilla | Article in Book | | 1995 |
| Community development and the Catholic Church | Joyce, DavidO'Connor, Raymond | Article in Book | | 2005 |
| Conference commemoration the centenary of the birth of Robert M. Burke | O'Connor, Gabriel | Article in Journal | | 2007 |
| Confessional to-ing and fro-ing in the eighteenth-century diaspora : Helena Barry's story (1738) | O'Connor, Thomas | Article in Book | | 2015 |
| Conflict, diaspora and empire : Irish nationalism in Britain, 1912-1922 | Gannon, Darragh | Monograph or Collective Volume | Cambridge University Press | 2022 |
| Conflicting visions in a turbulent age, 1900-1916 | O'Connor, Éimear | Monograph or Collective Volume | Crawford Art Gallery | 2016 |
| Consuelo remembers | O'Connor, Consuelo | Monograph or Collective Volume | The author | 2000 |
| Contesting the state : lessons from the Irish case | | Monograph or Collective Volume | Manchester University Press | 2008 |
| Contrasting communities : a comparative approach to Irish communities in baroque Europe | Gillespie, Raymond | Article in Book | | 2010 |
| Coolacrease : the true story of the Pearson executions - an incident in the Irish War of Independence | | Monograph or Collective Volume | Aubane Historical Society | 2008 |
| Correspondence. The social basis of the twenty-six county civil war | O'Connor-Lysaght, D. R. | Article in Journal | | 2009 |
| County Mayo. A history of imprisonment, capital punishment & transportation. Part 1. Anatomy of a County Gaol | O'Connor, Michael M. | Monograph or Collective Volume | Michael M. O'Connor | 2020 |
| County Mayo. A history of imprisonment, capital punishment & transportation. Part II. Castlebar prison & the Bridewells of County Mayo, 1835-1935 | O'Connor, Michael M. | Monograph or Collective Volume | Michael M. O'Connor | 2025 |
| County Tipperary : class struggle and national struggle, 1916-24 | O'Connor Lysaght, D. R. | Article in Book | | 1985 |
| County Wexford and Savannah, Georgia, 1848-1860 : a compilation of records and articles of County Wexford emigrants to Savannah | Kehoe, Lory | Monograph or Collective Volume | The author | 2013? |
| Cracking crime : Jim Donovan, forensic detective | O'Connor, Niamh | Monograph or Collective Volume | O'Brien Press | 2001 |
| Creating an Irish identity: print, culture, and the Irish Franciscans of Louvain | Caball, Marc | Article in Book | | 2018 |
| Cromwell and Crumlin | O'Connor, Patrick | Article in Journal | | 1950 |
| Crooke, Grierson and the Indian peasant : the 'Grierson cottage' in Gola-Gopalpur village, Gorakhpur district | Naithani, Sadhana | Article in Book | | 2006 |
| Custom and law in the philosophy of Suárez and in the histories of O'Sullivan Beare, Céitinn and Ó Cléirigh | Carroll, Clare | Article in Book | | 2001 |
| Custom, authority and tolerance in Irish political thought : David Rothe's Analecta Sacra et Mira (1616) | O'Connor, Thomas | Article in Book | | 2009 |
| Custom, authority, and tolerance in Irish political thought : David Rothe's Analecta Sacra et Mira (1616) | O'Connor, Thomas | Article in Journal | | 2000 |
| Cynthia O'Connor : an appreciation | Fitzgerald, Desmond | Article in Book | | 2001 |
| Daniel O'Connor's account of the 1st Light Infantry Regiment of the Irish Legion intended for Venezuela, 1819-1820 | Chartrand, René | Article in Journal | | 2009 |
| David Colbert Broderick | O'Connor, R. C. | Article in Journal | | 1914 |
| David Rothe, bishop of Ossory (c.1573-1650): bishop and historian | O'Connor, Thomas | Article in Journal | | 2009 |
| Dawn chorus : the origins of trade unionism in vocational education 1899-1930 | O'Connor, Emmet | Article in Book | | 1999 |
| Day nurseries in Northern Ireland 1941-1955 : gender ideology in social policy | McShane, Liz | Article in Book | | 1987 |
| Deascán ó Chorca Dhuibhne agus ó Chairbre i mbailiúchán lámhscríbhinní an Fheirtéirigh | Ní Úrdail, Meidhbhín | Article in Book | | 2019 |
| Debtors in Dublin prisons, 1730-1 | O'Connor, Patrick | Article in Journal | | 1945 |
| Deconstructing the Archive? A reflection on collection-centred ethnology in the Irish context | O'Connor, Anne | Article in Journal | | 2010 |
| Demonology, allegory and translation : the Furies and the Morrígan | Clarke, Michael | Article in Book | | 2014 |
| Dermot O'Connor's blazons and Irish heraldic terminology | Williams, N. J. A. | Article in Journal | | 1990 |
| Dermot O'Connor, translator of Keating | Ó Catháin, Diarmaid | Article in Journal | | 1987 |
| Derry Labour in the age of agitation, 1889-1923. 1 : New unionism and old, 1889-1906 | O'Connor, Emmet | Monograph or Collective Volume | Four Courts | 2014 |
| Derry Labour in the age of agitation, 1889-1923. 2 : Larkinism and syndicalism, 1907-23 | O'Connor, Emmet | Monograph or Collective Volume | Four Courts | 2016 |
| Devout humanism Irish-style : the influence of Sir Thomas More on Seathrún Céitinn | Ó Dúshláine, Tadhg | Article in Book | | 2001 |
| Did Bishop Malchus of Waterford resign because of the Synod of Raithbreasail? | O'Connor, Dónal | Article in Journal | | 2012 |
| Did Lionel Logue's ancestors come from Stillorgan? | O'Connor, Clive | Article in Journal | | 2011 |
| Diplomatic preparations for Kinsale | O'Connor, Thomas | Article in Book | | 2002 |
| Directories as genealogical sources for county Kerry | O'Connor, Thomas, of County Kerry | Article in Journal | | 1991 |
| Disputes in the Irish college, Douai (1594–1614) | O'Connor, Thomas | Article in Journal | | 2019 |
| Douglas Hyde and the Abbey theatre | O'Connor, Ulick | Article in Book | | 1992 |
| Dr Colm E. O'Riordan. National Museum of Ireland, 1962-1988. An appreciation | O'Connor, J.P. | Article in Journal | | 1992 |
| Dr James Tyrrell, agent at Florence | O'Connor, Cynthia | Article in Journal | | 1980 |
| Dreams of hope : the remarkable memoir of an Irish woman's life from the tenements of Dublin to Linton and Australia | O'Connor, Lily | Monograph or Collective Volume | Brandon | 2006 |
| Dublin | | Monograph or Collective Volume | Phaidon | 1993 |
| Dublin innkeepers in a new land | Wright, David | Article in Journal | | 1999 |
| Dunamase Castle | O'Connor, Kieran | Article in Journal | | 1996 |
| Dying to the old, rising to the new : an Icelandic saga with an Irish twist | O'Connor, Thomas | Article in Book | | 2016 |
| Early modern catholic self-fashioning : Tadhg Ó Cianáin, the Ulster earls and Santa Francesca Romana (1608) | Mac Craith, Mícheál | Article in Book | | 2010 |
| Easter Rising 1916 - Boland's Mills area | O'Connor, Joseph | Article in Journal | | 1966 |
| Economy and ascendancy in nineteenth-century Ireland | Bigelow, Gordon | Article in Book | | 2010 |
| Edna O'Brien : "psychic and moral historian" | O'Connor, Maureen | Article in Book | | 2008 |
| Edna O'Brien, Irish dandy | O'Connor, Maureen | Article in Journal | | 2005 |
| Education in Limerick 1830-60 | O'Connor, Kevin | Article in Journal | | 1980 |
| Education in nineteenth-century Ireland | | Article in Book | | 2002 |
| Eggs and rashers : Irish socialist memories | Merrigan, Matt | Monograph or Collective Volume | Umiskin | 2014 |
| Eileen O'Connor (1892-1921). Founder of Sydney's Brown Nurses | O'Connell, Mary | Article in Journal | | 2004 |
| Elite construction of identity : comparing Nehru and de Valera as national founders | White, Timothy J. | Article in Book | | 2006 |
| Elizabeth O'Connor Higgins; an eventful life | Higgins, JoeO'Callaghan, RoryRutherford, Colman | Article in Journal | | 2015 |
| Elizabethan Ireland, native and English | O'Connor, G. B. | Monograph or Collective Volume | | 1907 |
| Emerging voices : women in contemporary Irish society | O'Connor, Patrick | Monograph or Collective Volume | [s.n.] | 1998 |
| Emigration and famine : the evidence of Francis Spaight, July 1847 | O'Connor, Patrick J. | Article in Journal | | 1995 |
| Emulation and legacy : the master-pupil relationship between William Orpen and Seán Keating | O'Connor, Éimear | Article in Book | | 2013 |
| End of a liberal : the literary politics of Conor Cruise O'Brien | Lysaght, D. R. O'Connor | Monograph or Collective Volume | Plough Press | 1977 |
| English recusant controversy in Spanish print culture: dissemination, popularisation, fictionalisation | Sáez-Hidalgo, Ana | Article in Book | | 2018 |
| English settlement and change in Roscommon during the late sixteenth and seventeenth centuries | O'Connor, Kieran | Article in Book | | 2007 |
| Entre Castigo y asimilación : los irlandeses y la Inquisición espanola (1580-1750) | O'Connor, Thomas | Article in Book | | 2014 |
| Essay in review. Connecting Connolly | O'Connor, Emmet | Article in Journal | | 2006 |
| Essay. Hail Russia! Labour and the Bolshevik revolution | O'Connor, Emmet | Article in Journal | | 2017 |
| Estimates of gross and net output and income arising in agriculture in all Ireland and in the Free State area in selected years between 1900/01 and 1926-27 | Henry, E. W.O'Connor, Robert | Article in Journal | | 1996 |
| Estimates of gross and net output and income arising in agriculture in all Ireland and in the Free State area in selected years between 1908 and 1926/27 | Henry, E. W.O'Connor, Robert | Monograph or Collective Volume | Economic and Social Research Institute | 1995 |
| Estimates of gross and net output and income arising in agriculture in all Ireland and the Free State area in selected years between 1900/01 and 1926/27 | Henry, E. W.O'Connor, Robert | Monograph or Collective Volume | Economic and Social Research Institute | 1996 |
| Étudiants et professeurs irlandais dans les universités de Toulouse et de Cahors (XVIIe-XVIIIe siécles) : les limites de la mission irlandaise | Ferté, Patrick | Article in Book | | 2006 |
| Eugenius, bishop of Ardmore and Suffragan at Lichfield (1184-5) | O'Connor, Donal | Article in Journal | | 2004 |
| Eva Gore-Booth's queer art of war | O'Connor, Maureen | Article in Book | | 2016 |
| Even the olives are bleeding : the life and times of Charles Donnelly | O'Connor, Joseph, 1963- | Monograph or Collective Volume | New Island Books | 1992 |
| Ever changing scene | O'Connor, L. | Article in Journal | | 1987 |
| Everchanging state (p. II) | O'Connor, L. | Article in Journal | | 1989 |
| Everchanging state (p. III) | O'Connor, L. | Article in Journal | | 1990 |
| Exile Movement: Male Institutions, 1568-1640 | O'Connor, Thomas | Article in Book | | 2023 |
| Exile, astrology and the Spanish Inquisition | O'Connor, Thomas | Article in Book | | 2013 |
| Exiles and saints in baroque Europe : George Conn and the Scotic debate | Harris, Jason | Article in Book | | 2010 |
| Exploring Limerick's past : an historical geography of urban development in county and city | O'Connor, Patrick J. | Monograph or Collective Volume | Oireacht na Mumhan Books | 1987 |
| Extracts relating to Old Dublin from the 'London Gazette' | O'Connor, Patrick | Article in Journal | | 1943 |
| Family memories of Kilmacud | Mulready, Marie | Article in Journal | | 2017 |
| Family, Ireland, and politics in Edwin O'Connor's "All in the family" | Duffy, Charles E. | Article in Journal | | 2004 |
| Famine and folklore stories from the Rhode area as gathered for the schools manuscript commission | O'Connor, Mary | Monograph or Collective Volume | | 2023 |
| Father Mathew Tower at Mount Patrick | Lombard, Mary | Article in Journal | | 2017 |
| Fearful Symmetry : An Emigrant's Return to Celtic Tiger Ireland | O'Connor, Maureen | Article in Journal | | 2007 |
| Feargus in love | Powell, J. S. (John Stocks) | Article in Journal | | 2014 |
| Feargus O'Connor | Pickering, Paul A. | Monograph or Collective Volume | Merlin Press | 2008 |
| Feargus O'Connor as seen by a contemporary | Pollard, Sidney | Article in Journal | | 1972 |
| Feargus O'Connor in the House of Commons, 1847-1852 | Roberts, Stephen | Article in Book | | 1999 |
| Feargus O'Connor, Irishman and Chartist | Read, Donald | Article in Journal | | 1961 |
| Feargus O'Connor, Irishman and Chartist | Glasgow, EricRead, Donald | Monograph or Collective Volume | Edward Arnold | 1961 |
| Fergus O'Connor and J. Bronterre O'Brien | Briggs, Asa | Article in Book | | 1966 |
| Fergus O'Connor and the Northern Star | Epstein, J. A. | Article in Journal | | 1976 |
| Field Survey of Middlequarter, Newtown & Killongford, Co Waterford | Dowling, SimonKnight-O'Connor, Christina : Cantwell, Eddie | Article in Journal | | 2017 |
| Financial mismanagement at the Irish College, 1772–98 | Korten, Christopher | Article in Book | | 2018 |
| Fitzpatrick's Boston, 1846-1866 : John Bernard Fitzpatrick, third bishop of Boston | O'Connor, Thomas H. | Monograph or Collective Volume | Northeastern UP | 1984 |
| Flower Club fifty years, a growing Kilmallock Flower Club Show | O'Connor, Betty | Article in Journal | | 2009 |
| Flowers in the attic : recovering the reputation of a forgotten Irish flower painter, Moyra Barry (1885-1960) | Eckett, Jane | Article in Book | | 2010 |
| Folk music in Ireland | O'Connor, R. C. | Article in Journal | | 1918 |
| Folklore and tradition | Conneely, Helen | Article in Book | | 2006 |
| Forming Catholic Communities: Irish, Scots and English College networks in Europe, 1568–1918 | | Monograph or Collective Volume | BRILL | 2018 |
| Fr Batt O'Connor and the Killorglin Tithe War 1835 | O'Reilly, Hugh | Article in Journal | | 2011 |
| France and the Free State: Franko-Irish diplomacy, 1922-1931 | O'Connor, Priscilla Brigid | Thesis | | 1991 |
| Frances Power Cobbe and the patriarchs | O'Connor, Maureen P. | Article in Book | | 2005 |
| Frank O'Connor | O'Connor, Catherine | Article in Journal | | 2021 |
| Frank O'Connor : a life | McKeon, Jim | Monograph or Collective Volume | Mainstream | 1998 |
| Frank O'Connor and the Irish holocaust | Evans, Robert C. | Article in Book | | 2006 |
| Frank O'Connor and the literary development of Radio Éireann | Morgan-Zayachek, Eileen | Article in Journal | | 2009 |
| Frank O'Connor in "The New Yorker" | Alexander, James | Article in Journal | | 1995 |
| Frank O’Connor: Pembroke Library’s First Librarian | Moore, Cormac | Article in Book | Dublin City Council | 2024 |
| Fraternally yours : Roderic and Francis Burdett O'Connor | Geary, Laurence M. | Article in Journal | | 1990 |
| Friable transnationalism : the question of the South African Gandhi and the Irish Nivedita | Boehmer, Elleke | Article in Book | | 2006 |
| Friend or Foe? John Redmond and the Labour Movement, 1891-1918 | O'Connor, Emmet | Article in Journal | | 2018 |
| Friendship at the core: Ireland, Sweden and the School of Scottish Studies | Mackay, Margaret A. | Article in Book | | 2019 |
| From Bruff to the Balkans : James David Bourchier | Foley, Michael | Article in Book | | 2010 |
| From castle to cabin | Ó Láimhín, Peadar | Article in Journal | | 1994 |
| From Connerville, county Cork to Connerville, Van Diemen's land : the Irish family background and colonial career of Roderic O'Connor (1786/1787? - 1860) | Geary, Laurence M. | Article in Book | | 2008 |
| From Gombeen to Gubeen : tourism, identity and class in Ireland, 1949-99 | Cronin, Michael, 1960-O'Connor, Barbara | Article in Book | | 2000 |
| From Kedrah in Cahir, Co. Tipperary, to Kedrah in St John's, Newfoundland | Meagher, Margaret | Article in Journal | | 1998 |
| From Ladywell to the Liberties: Conversations with Finbar Boyle | Sherlock, Tom | Article in Book | | 2019 |
| From the GPO to the Winter Palace : how a Workers’ Revolution was lost and how a Workers’ Revolution was won | Lysaght, D. R. O'Connor | Monograph or Collective Volume | Irish Labour History Society | 2016 |
| Gabriel Hayes (1909-78), sculptor | Murphy, Paula | Article in Book | | 2010 |
| Gaelic reaction to plantation: the case of the O'More and O'Connor lordships of Laois and Offaly, 1570-1603 | Carey, Vincent Patrick | Thesis | | 1985 |
| Gallows Hill Community Archaeology Project | Knight-O'Connor, Christina : Cantwell, Eddie | Article in Journal | | 2019 |
| Galway and the First World War | Murphy-O'Connor, James | Thesis | | 2008 |
| Galway postal history | O'Connor, Jim | Article in Journal | | 1995 |
| Gander at the gate | O'Connor, Rory | Monograph or Collective Volume | Lilliput Press | 2000 |
| Gender and organisational culture at senior management level : limits and possibilities for change | O'Connor, Pat | Article in Book | | 2010 |
| Gender and the decorative arts : Evelyn Gleeson and the Irish cultural revival | Brown, Karen E. | Article in Book | | 2010 |
| Gender in Irish society | | Monograph or Collective Volume | Officina Typographica, Galway University Press | 1987 |
| General Arthur O'Connor | Connor, Con M. | Article in Book | | 1998 |
| General Francis Burdett O'Connor | Lambert, E. | Article in Journal | | 1977 |
| General Sir Richard O'Connor - first significant British military victory in WWII | McGrath, Con | Article in Journal | | 2013 |
| George Faulkner and Jonathan Swift | O'Connor, Charles | Article in Journal | | 1935 |
| George Faulkner and the Irish Catholics | O'Connor, Charles | Article in Journal | | 1939 |
| George Francis Fitzgerald, 1851-1901 | O'Connor, J. J.Robertson, Edmund F. | Article in Book | | 2003 |
| Gladly learn and gladly teach : Alexandra College and School 1866-1966 | O'Connor, Anne V.Parkes, Susan M. | Monograph or Collective Volume | Blackwater | 1984 |
| Gladstone, Parnell and the great Irish struggle | McWade, RobertO'Connor, T. P. | Monograph or Collective Volume | | 1888 |
| Glin maps | O'Connor, Patrick J. | Article in Book | | 2009 |
| Grangegorman : an urban quarter with an open future | | Monograph or Collective Volume | Gandon Editions | 2014 |
| Gravestone inscriptions of Co. Cork XX: Kilcolman Burial Ground, Coachford | Henchion, Richard | Article in Journal | | 2017 |
| Griffith’s valuation a genealogical source for county Kerry | O'Connor, Thomas, of County Kerry | Article in Journal | | 1995 |
| Growing up in Maxtown | O'Connor, Kit | Article in Book | | 2007 |
| Growth and development of county Limerick's leading towns | O'Connor, P. J. | Article in Book | | 2009 |
| Guests of a nation ; geists of a nation | O'Brien, Eugene | Article in Journal | | 2007 |
| Hand of history : burden of pseudo-history : touchstone of truth | O'Connor, Tom | Monograph or Collective Volume | Trafford Publishing | 2007 |
| Harry Kernoff: The Little Genius | O'Connor, Kevin | Monograph or Collective Volume | Liffey Press | 2012 |
| Haunted English : the Celtic fringe, the British Empire, and de-anglicization | O'Connor, Laura | Monograph or Collective Volume | Johns Hopkins University Press | 2006 |
| Haunted Ireland : her romantic and mysterious ghosts | Dunne, John J. | Monograph or Collective Volume | Appletree Press | 1977 |
| History and historia : uses of the Troy story in medieval Ireland and Wales | Fulton, Helen | Article in Book | | 2014 |
| History and origins of the O'Connors | O'Hara, Martin | Monograph or Collective Volume | The author | 1987 |
| History of healthcare at Grangegorman | O'Connor, Anne | Article in Book | | 2014 |
| History of Ireland, 1798-1924. 2 vols. | O'Connor, James, Sir | Monograph or Collective Volume | | 1925 |
| History of Ireland, 1798-1924. 2 vols. | O'Connor, James, Sir | Monograph or Collective Volume | | 1925 |
| Hometown : a portrait of Newcastle West, Co. Limerick | O'Connor, Patrick J. | Monograph or Collective Volume | Oireacht na Mumhan Books | 1998 |
| Horace Plunkett, the Co-operative movement and the cultural revival | Byrne, NoreenO'Connor, Ray | Article in Book | | 2017 |
| Hugh O'Neill : free spirit, religious chameleon or ardent Catholic? | O'Connor, Thomas | Article in Book | | 2004 |
| Hunger amd hardship in Kilkerrin, 1841-1901 | Gordon, Maria | Article in Book | | 2006 |
| Hurdle making in Dublin, 1302-3 | O'Connor, Patrick | Article in Journal | | 1952 |
| Imogen Stuart's Stillorgan connection | O'Connor, Anne | Article in Journal | | 2017 |
| Imtheachta Aeniasa and its place in medieval Irish textual history | Poppe, Erich | Article in Book | | 2014 |
| In a class of her own : Louisa, marchioness of Waterford (1818-91) | Campbell, Myles | Article in Book | | 2010 |
| In safe hands | O'Connor, Mick | Monograph or Collective Volume | Mick O'Connor | 2025 |
| In Search of a State : Catholics in Northern Ireland | O'Connor, Fionnuala | Monograph or Collective Volume | The Blackstaff Press | 1993 |
| In the saddle | O'Connor, Philip | Article in Book | | 1990 |
| India and the translation of the Irish Brehon laws | Laird, Heather | Article in Book | | 2006 |
| Infants killed before baptism haunt mother (ML 4025) : perspectives on a legend type absent in Ireland | O'Connor, Anne | Article in Journal | | 1991 |
| Influences affecting girls' secondary education in Ireland 1860-1910 | O'Connor, A. V. | Article in Journal | | 1986 |
| Influences affecting girls' secondary education in Ireland, 1860-1910 | O'Connor, Anne | Thesis | | 1981 |
| Injured pride. O'Connor v. Murtagh. Much ado about nothing | Finlay, John | Article in Journal | | 2006 |
| Insects and entomology | O'Connor, James P. | Article in Book | | 1997 |
| Inside accounts, volume 1 : the Irish government and peace in Northern Ireland, from Sunningdale to the Good Friday Agreement / Interviews by Graham Spencer | Spencer, Graham | Monograph or Collective Volume | Manchester University Press | 2020 |
| Institutionalising changing conceptualisations of charity in Ireland: charitable loan fund societies in Ireland, 1729-1823 | O'Connor, Ray | Article in Journal | | 2022 |
| Interractions from the periphery : some Irish religious minorities and India, c.1850-1923 | Peatling, Gary K. | Article in Book | | 2006 |
| Into the West : a survey and reassessment of the two most westerly archaeological sites in Europe | Buckley, Victor M.Condit, TomO'Connor, Kieran | Article in Book | | 2007 |
| Introduction | Barr, ColinO'Connor, Anne | Article in Book | | 2014 |
| Introduction | Lyons, Mary AnnO'Connor, Thomas | Article in Book | | 2006 |
| Introduction | | Article in Book | | 2006 |
| Introduction | Lyons, Mary Ann,O'Connor, Thomas, | Article in Book | | 2010 |
| Introduction - college communities abroad: education, migration and Catholicism in early modern Europe | Chambers, Liam | Article in Book | | 2017 |
| Introduction : a view from everywhere | O'Connor, Éimear | Article in Book | | 2010 |
| Introduction : must 2014 be another 1913? | Lysaght, D. R. O'Connor | Article in Book | | 2013 |
| Ireland 1793-1800 | O'Connor Morris, William | Article in Journal | | 1891 |
| Ireland : a book of light on the Irish problem ... | | Monograph or Collective Volume | | 1886 |
| Ireland and Europe, 1580-1815 : some historiographical remarks | O'Connor, Thomas | Article in Book | | 2001 |
| Ireland and India : colonies, culture and empire | | Monograph or Collective Volume | Irish Academic Press | 2006 |
| Ireland and the scientific tradition | Counihan, Martin J. | Article in Book | | 1994 |
| Ireland since Parnell | Sheehan, D. D. (Daniel Desmond) | Monograph or Collective Volume | D. O'Connor | 1921 |
| Ireland's last best west : evidence from the Courtenay/Devon estate | O'Connor, Patrick | Article in Journal | | 1990 |
| Ireland's man in the Holy Land : Father Jerome Murphy-O'Connor OP (1935-2013) | McConvery, Brendan | Article in Book | | 2015 |
| Ireland, 1798-1898 | O'Connor Morris, William | Monograph or Collective Volume | | 1898 |
| Ireland, India and empire : Indo-Irish separatist political links and perceived threats to the British Empire | O'Malley, Kate | Article in Book | | 2006 |
| Ireland, India and popular nationalism in the early nineteenth cenutry | Ryder, Sean | Article in Book | | 2006 |
| Irish Astronomical Society : a history, 1937-2006 | O'Connor, James | Monograph or Collective Volume | James O'Connor | 2006 |
| Irish clerics and French politics of grace | O'Connor, Priscilla | Article in Book | | 2003 |
| Irish clerics and Jacobites in early eighteenth-century Paris, 1700-30 | O'Connor, Priscilla | Article in Book | | 2001 |
| Irish clerics in Madrid, 1598-1665 | García Hernán, Enrique | Article in Book | | 2006 |
| Irish clerics in the university of Paris, 1570-1770 | O'Connor, Priscilla | Thesis | | 2006 |
| Irish Collegians in Spanish Service (1560–1803) | O’Connor, Thomas | Article in Book | | 2018 |
| Irish communities in early-modern Europe | | Monograph or Collective Volume | Four Courts | 2006 |
| Irish diplomatic missions to Rome during the 1640s | Ó hAnnracháin, Tadhg | Article in Book | | 2006 |
| Irish émigré group strategies of survival, adaptation and integration in seventeenth and eighteenth-century Spain | Recio Morales, Óscar | Article in Book | | 2006 |
| Irish entrepreneurs and Sweden in the first half of the eighteenth century | Murdoch, Steve | Article in Book | | 2006 |
| Irish Franciscan networks at home and aborad, 1607-1640 | O'Connor, Thomas | Article in Book | | 2010 |
| Irish Government policy and public opinion towards German-speaking refugees, 1933-1943 | O'Connor, Siobhán | Monograph or Collective Volume | Cambridge Scholars Publishing | 2017 |
| Irish identity and integration within the British armed forces, 1939-1945 | O'Connor, Steven | Article in Journal | | 2015 |
| Irish involvement in the 'surprise of Cremona', 1702 | Ó hAnnracháin, Tadhg | Article in Book | | 2006 |
| Irish iron age and early Christian whetstones | O'Connor, Lily | Article in Journal | | 1991 |
| Irish Jacobite involvement in the American war of independence | Clarke de Dromantin, Patrick | Article in Book | | 2003 |
| Irish Jansenists, 1600-70 : religion and politics in Flanders, France, Ireland and Rome | O'Connor, Thomas | Monograph or Collective Volume | Four Courts | 2008 |
| Irish labour and the Home Rule question, 1881-1914 | O'Connor, Emmet | Article in Journal | | 2019 |
| Irish liberation | O'Connor, Ulick | Monograph or Collective Volume | Grove Press | 1974 |
| Irish literature in Spanish Flanders | Ó hUiginn, Ruairí | Article in Book | | 2010 |
| Irish migrant networks and rivalries in Spain, 1575-1659 | Schüller, Karin | Article in Book | | 2003 |
| Irish migrants in Europe after Kinsale, 1602-1820 | | Monograph or Collective Volume | Four Courts | 2003 |
| Irish migration and exiles in Spain : refugees, soldiers, traders and statesmen | Villar García, María Begoña | Article in Book | | 2006 |
| Irish migration to Spain and the formation of an Irish college network, 1589-1800 | O'Connor, Thomas | Article in Book | | 2001 |
| Irish narrative literature and the Classical tradition, 900-1300 | O'Connor, Ralph | Article in Book | | 2014 |
| Irish political activity in Spain during the restoration | Pérez Tostado, Igor | Article in Book | | 2006 |
| Irish republicanism in England : the first phase, 1797-9 | Elliott, Marianne | Article in Book | | 1979 |
| Irish students in the Paris Faculty of Theology : aspects of doctrinal controversy in the Ancien Regime, 1730-60 | O'Connor, Priscilla | Article in Journal | | 1998 |
| Irish tourism : image, culture and identity | | Monograph or Collective Volume | Channel View Publications | 2003 |
| Irish trade union organization. [Review article] | O'Connor, Emmet | Article in Journal | | 2011 |
| Irish translation in continental Europe, 1630-1660 | Dillon, Charles | Article in Book | | 2006 |
| Irish VCs in the Indian Mutiny | Joye, Lar | Article in Journal | | 2010 |
| Irish voices from the Spanish Inquisition : migrants, converts and brokers in early modern Iberia | O'Connor, Thomas | Monograph or Collective Volume | Palgrave Macmillan | 2016 |
| Irish votes and Yankee cotton : the constitution of 1853 | O'Connor, Thomas H. | Article in Journal | | 1983 |
| Irish women artists, 1800-2009 : familiar but unknown | | Monograph or Collective Volume | Four Courts | 2010 |
| Ironing the land : the coming of the railways to Ireland | O'Connor, Kevin | Monograph or Collective Volume | Gill & Macmillan | 1999 |
| Isaac W. Usher, father and son | O'Connor, Anne | Article in Journal | | 2020 |
| James Arthur O'Connor | Hutchinson, John, 1949- | Monograph or Collective Volume | National Gallery of Ireland | 1985 |
| James Barry | O'Connor, R. F. | Article in Journal | | 1906 |
| James Connolly, a study of his life and work | O'Connor, Gerald | Monograph or Collective Volume | Curtis | 1917 |
| James Cousins and his nation of free slaves | Guinness, Selina | Article in Book | | 2006 |
| James Larkin | O'Connor, Emmet | Monograph or Collective Volume | Cork University Press | 2002 |
| James Larkin in the United States, 1914-23 | O'Connor, Emmet | Article in Journal | | 2002 |
| James Latham : further documentation | O'Connor, Andrew | Article in Journal | | 1975 |
| James O'Connor, fenian, and the tragedy of 1890 | Lowth, Cormac | Article in Journal | | 2002 |
| Jeremiah Curtin agus Conchúrach Iarthar Luimní | Bourke, Angela | Article in Journal | | 2014 |
| Jim Larkin and the Communist International, 1923-9 | O'Connor, Emmet | Article in Journal | | 1999 |
| Jimmy O'Connor 1928-1993 | O'D., P. | Article in Journal | | 1994 |
| John A. McClelland 1870-1920 | O'Connor, Thomas | Article in Book | | 2003 |
| John Bradley's research on Anglo-Norman Ireland | O'Connor, Kieran | Article in Journal | | 2016 |
| John Burgh Rochfort : preacher extraordinary | O'Connor, David A. | Monograph or Collective Volume | Charlton Kings Local History Society | 2007 |
| John Lewis : a Smock Alley scene painter | O'Connor, Andrew | Article in Journal | | 1977 |
| John McGahern (b.1934) | O'Connor, Joseph, 1963- | Article in Book | | 2005 |
| John O'Connor (1920-1959): a personal remembrance of the life and work of the Armagh author of 'Come Day - Go Day' | Gough, Fionnuala (née O'Connor) | Article in Journal | | 2015 |
| John O'Connor : communal politician | Swainson, Donald | Article in Journal | | 1998 |
| John O'Connor Power from Clashganny | Flannagan, Peter | Article in Journal | | 2019 |
| John O'Connor Power, Charles Stewart Parnell and the centralisation of popular politics in Ireland | Jordan, D. | Article in Journal | | 1986 |
| John Stratton O'Leary and the O'Leary Flats | O'Connor, Patricia | Article in Journal | | 1989 |
| Joseph O'Connor (b.1963) | Mathews, P. J. | Article in Book | | 2005 |
| Joseph O'Connor, editor, author and poet, who deceased at Rochester, N. Y., October 9th, 1908 | Anonymous | Article in Journal | | 1909 |
| Judge William O'Connor Morris, 1824-1904, Gortnamona, Tullamore. 'The pamphleteering judge' | Byrne, Michael | Article in Journal | | 2008 |
| Just Billa | O'Connor, Michael | Monograph or Collective Volume | Mercier Press | 2000 |
| Justin Keating | Siggins, Lorna | Article in Book | | 2016 |
| Justin McCarthy | O'Connor, R. F. | Article in Journal | | 1912 |
| Justin McCarthy | O'Connor, R. F. | Article in Journal | | 1912 |
| Kerry Aroo | O'Connor, Joe | Article in Journal | | 1951 |
| Kerry's patriot dead : Mulvihill, Shortis, O'Connor and the O'Rahilly | Revington, Gordon | Article in Book | Irish Historical Publications | 2016 |
| Kilkerrin in early times | Fahy, Thomas B. | Article in Book | | 2006 |
| Killarney tourist literature of the past | O'Connor, Thomas, of County Kerry | Article in Journal | | 1994 |
| L'insertion des réfugiés jacobites dans la société francaise du dix-huitiéme siècle | Dromantin, Patrick Clarke de | Article in Book | | 2006 |
| La experiencia invisible: imigrantes irlandeses en el Perú | McEvoy, Gabriela | Monograph or Collective Volume | Editorial de la Universidad Nacional de San Marcos | 2018 |
| Labour and left politics | O'Connor, Emmet | Article in Book | | 1996 |
| Labour and politics, 1830-1945 : colonisation and mental colonisation | O'Connor, Emmet | Article in Book | | 2005 |
| Labour in waiting : * the after-effects of the Dublin lockout | Lysaght, D.R. O'Connor | Article in Journal | | 2013 |
| Labour lives | O'Connor, Emmet | Article in Journal | | 1999 |
| Larkin, Connolly and the Cause of Labour | O'Connor, Emmet | Article in Book | | 2017 |
| Last flight of the Wild Geese? Bonaparte's Irish Legion, 1803-15 | Bartlett, Thomas | Article in Book | | 2006 |
| Last man standing : hurling goalkeepers | O'Connor, Christy | Monograph or Collective Volume | O'Brien Press | 2005 |
| Laurence O'Connor, a Meath schoolmaster | Brady, John, d.1963 | Article in Journal | | 1937 |
| Lawrence O'Connor (d.1795) | Chambers, Liam | Article in Book | | 1998 |
| Lawrence O'Connor : a Meath schoolmaster | Brady, John, d.1963 | Article in Journal | | 1937 |
| Legendary pasts and the uncanny orient : Yeats and India | Sen, Malcolm | Article in Book | | 2006 |
| Leonard MacNally - the most disreputable barrister to have ever practiced at the Irish bar? | O'Connor, Eoin | Article in Journal | | 2015 |
| Leslie Daiken and Harry Kernoff | Goldstone, Katrina | Article in Book | | 2016 |
| Lhote's wives - scapegoating women artists, 1962-84 | Kennedy, Róisín | Article in Book | | 2010 |
| Liberty Hall in Irish history : some perspectives | Ferriter, Diarmaid | Article in Book | | 2013 |
| Lieutenant Martin Fitzgerald MC (1917-1945) | O'Connor, Clive | Article in Journal | | 2023 |
| Life in Wicklow a century ago... 1921 | Finlay, John | Article in Journal | | 2021 |
| Life, lore and song: Essays in Irish tradition in honour of Ríonach uí Ógáin : 'Binneas an tSiansa': Aisti in onóir do Ríonach uí Ógáin | NA | Monograph or Collective Volume | Four Courts Press | 2019 |
| Limerick post office : memories of forgotten times | O'Connor, Frank | Monograph or Collective Volume | Frank O'Connor | 2007 |
| Living in a coded land | O'Connor, Patrick J. | Monograph or Collective Volume | Oireacht na Mumhan Books | 1992 |
| Living in good faith. Éimear O'Connor pays tribute to Margaret Irwin-West who quietly embodies Jean-Paul Sartre's dictum | O'Connor, Éimear | Article in Journal | | 2015 |
| Living with empire : Maurice Collis, Anglo-Irish Indian civil servant on national aspirations in Ireland and India | Derné, SteveLisa, Jadwin | Article in Book | | 2006 |
| Looking back | O'Connor, James P. | Article in Book | | 2001 |
| Lordship and crown : Llywelyn of Wales and O'Connor of Connacht | Lydon, James F. | Article in Book | Donald | 1988 |
| Lost and found: the Cloosmore Ring-brooch | Bennett, IsabelO'Connor, Nessa | Article in Journal | | 2019 |
| Lost Ireland : a photographic record at the turn of the century | Gallagher, PatrickO'Connor, Laurence | Monograph or Collective Volume | Viking | 1984 |
| Loyalism and labour in Belfast : the autobiography of Robert McElborough, 1884-1952 | | Monograph or Collective Volume | Cork University Press | 2002 |
| Ludwig Wittgenstein on buildings in Dublin | McCormack, W. J. | Article in Book | | 1992 |
| Luke Joseph Hooke 1714-96 : an Irish theologian in enlightenment France, 1714-96 | O'Connor, Thomas | Monograph or Collective Volume | Four Courts | 1995 |
| Luke O'Connor : the first soldier to win the V.C. | Smith, Des | Article in Journal | | 1998 |
| Luke Wadding's networks at home and abroad | O'Connor, Thomas | Article in Book | | 2008 |
| Mabel Browne, Countess of Kildare, and the restoration of the house of Kildare, 1552-1610 | O'Connor, Carol | Article in Book | | 2014 |
| Major Tom O'Connor | Fitzgerald, Edward | Article in Journal | | 2001 |
| Malchus (c.1047-1135), monk of Winchester and first bishop of Waterford | O'Connor, Donal | Article in Journal | | 2005 |
| Margaret Clarke as a history painter : Strindbergian (1927) | Briggs, Carla | Article in Book | | 2010 |
| Marian Choral Society: forty years of music theatre in Tuam | O'Connor, Rosaleen | Article in Journal | | 2016 |
| Marsh's library and the Irish Catholic tradition | O'Connor, Thomas | Article in Book | | 2004 |
| Mary Delany - a talented Georgian lady | O'Connor, Anne | Article in Journal | | 2015 |
| Mary Galway | Moriarty, Theresa | Article in Book | | 2016 |
| Max Levitas (1915-2018) communist and anti-fascist | O'Connor, Emmet | Article in Journal | | 2019 |
| Media audiences in Ireland : power and cultural identity | | Monograph or Collective Volume | University College Dublin Press | 1997 |
| Medieval Britain and Ireland in 2004 | Gaimster, MäritGeake, HelenJames, Tom BeaumontO'Connor, KieranSherlock, Rory | Article in Journal | | 2005 |
| Medieval Britain and Ireland in 2005 | Gaimster, MäritGeake, HelenJames, Tom BeaumontO'Connor, KieranSherlock, Rory | Article in Journal | | 2006 |
| Medieval Britain and Ireland in 2009 | | Article in Journal | | 2013 |
| Medieval Britain and Ireland in 2010 | | Article in Journal | | 2013 |
| Medieval funerary effigies in Gaelic Ireland : exploring some thirteenth-century French pathways | O'Loghlen, Edward | Article in Book | | 2013 |
| Medieval regionalism in north county Kerry : a region anatomised | O'Connor, Patrick J. | Article in Journal | | 1991 |
| Medieval regionalism in north County Kerry : concepts and criteria | O'Connor, P. J. | Article in Journal | | 1988 |
| Megillah Esther. Yvonne Altman O'Connor tells us about the Irish-Jewish Museum and describes a piece from its collections | O'Connor, Yvonne Altman | Article in Journal | | 2022 |
| Memory and cultural identity, collecting folklore in Australia | O'Connor, Anne | Article in Journal | | 2004 |
| Michael McKeown | Marley, Laurence | Article in Book | | 2016 |
| Military precautions in Dublin, 1803 | O'Connor, Patrick | Article in Journal | | 1943 |
| Miss Battersby : a case study | O'Connor, Éimear | Article in Book | | 2010 |
| Mixed marriage, "a grave injury to our church" : An account of the 1957 Fethard-on-Sea Boycott | O'Connor, Catherine | Article in Journal | | 2008 |
| Moladh aráin Thaidhg Uí Choileáin | Ó hÓgáin, Éamonn | Article in Book | | 2019 |
| Monsignor Thomas Aquinas Quirke | Crowley, SeamusO'Connor, Jim | Article in Journal | | 1998 |
| Monsters of the tribe : berserk fury, shapeshifting and social dysfunction in Táin Bó Cúailgne, Egils saga and Hrólfs saga kraka | O'Connor, Ralph | Article in Book | | 2016 |
| Monstrous hybridity : Kim of the 'Eye-rishti' and the Survey of India | Cronin, Nessa | Article in Book | | 2006 |
| More than a uniform | O'Connor, Stephen | Monograph or Collective Volume | O'Connor | 1999 |
| Mórsheisear scéilíní faoi chursaí ceoil | Ó Catháin, Séamas | Article in Book | | 2019 |
| Moya Llewelyn Davies: spy, stalker, patriot or fantasist? | Ryan, Seán | Article in Journal | | 2021 |
| Murder stops play - eventually! | Keane, Barry | Article in Journal | | 2013 |
| My father's son | O'Connor, Frank | Monograph or Collective Volume | Gill & Macmillan | 1968 |
| Nano Reid : from the Boyne to Bohemia | Coulter, Riann | Article in Book | | 2010 |
| Napoleon's Irish doctor | O'Connor, Hubert | Article in Journal | | 2009 |
| Nathaniel Hooke (1664-1738) and the French embassy to Saxony, 1711-12 | Byrne, Thomas | Article in Book | | 2006 |
| Nation / Nazione : Irish nationalism and the Italian Risorgimento | | Monograph or Collective Volume | University College Dublin Press | 2014 |
| National treasures in Dublin | O'Connor, Hector | Monograph or Collective Volume | Three Candles | 1953 |
| Natural history collections | O'Connor, James P. | Article in Book | | 2009 |
| Natural philosophy / physics | O'Connor, Tom | Article in Book | | 1999 |
| Neilí O'Brien and the Gaelic League | Murphy, Maureen | Article in Book | | 2019 |
| Neither democratic nor a programme: the Democratic Programme of 1919 | O'Connor, Emmet | Article in Journal | | 2016 |
| Nicholas O'Toole of Hacketstown | Shannon, James P. | Article in Journal | | 2013 |
| No America for me! Going to New York in 1906 | Stine, Nora O'Connor, fl. 1906 | Article in Journal | | 1999 |
| Nomadic figures : the 'Rhetorical excess' of Irishness in political economy | Lloyd, David | Article in Book | | 2010 |
| Nora Connolly-O'Brien | Ó Catháin, Máirtín | Article in Book | | 2016 |
| North Kerry - a hurling history : a history of the North Kerry Hurling Board, 1925-2015 | O'Connor, Tommy | Monograph or Collective Volume | Bord Iomána Chiarraí Thuaidh | 2015 |
| Not only beef, but beauty.... : tourism, dependency, and the post-colonial Irish state, 1925-30 | Thompson, Spurgeon | Article in Book | | 2003 |
| Notes and Comments. Genevieve Beale, 1822-78 | O'Connor, Deirdre | Article in Journal | | 2009 |
| Notes and documents: Papers relating to the Irish rebellion of 1798 | Marsden, AnthonyParish, J.Ross, H. | Article in Journal | | 1910 |
| Notes and queries | Walker, Una | Article in Book | | 2010 |
| O'Connell, O'Connor and O'Brien angles of vision, 1832-48 | McCormack, Caitriona Marie | Thesis | | 1996 |
| O'Connor : people and places | Weir, Hugh W. L. | Monograph or Collective Volume | Ballinakella | 1994 |
| O'Connor jewellers, 51 Lr Georges Street, Dun Laoghaire | Scudds, C. | Article in Journal | | 1993 |
| O'Connor Kerry of Carrigafoyle: History and memory in Iraghticonor | McAuliffe, Mary | Article in Journal | | 2014 |
| O'Connor of Sylan, Co. Galway | Anonymous | Article in Journal | | 1927 |
| O'Connor's Stronghold, Derrywarragh Island, Maghery, County Armagh | Donnelly, Colm J.McGranaghan, ClareMoore, Peter | Article in Journal | | 2004 |
| O'Connor, O'Connell and the attitudes of Irish immigrants towards Chartism in the north of England, 1838-48 | Treble, J. | Article in Book | | 1973 |
| O'Connorite bedlam : Feargus and his grand-nephew, Arthur | Geary, Laurence M. | Article in Journal | | 1990 |
| Obituaries. Eddie O'Connor, 1948-2013 | Crowley, Tim | Article in Journal | | 2014 |
| Obituary. Marcus William Robert de Vere Graham (1915-1995) | O'Connor, J.P. | Article in Journal | | 2000 |
| Obituary. Pat Murphy | O'Connor, Philip | Article in Journal | | 2010 |
| Obituary. Patrick J. Corish 1921-2013 | O'Connor, Thomas | Article in Journal | | 2014 |
| Obituary. Richard Charles Faris 1911-1984 | O'Connor, J.P. | Article in Journal | | 1992 |
| Observing Irish romantic landscape paintings | Nahum, Katherine | Article in Book | | 2003 |
| Old wine in new bottles : some lessons of the Dublin Lockout | Connolly, James, 1868-1916 | Monograph or Collective Volume | D. R. O'Connor Lysaght | 2013 |
| Oliver Kelly, Archbishop of Tuam, 1815-1834 | Claffey, Anthony J. | Article in Book | | 2006 |
| Oliver St John Gogarty : a poet and his times | O'Connor, Ulick | Monograph or Collective Volume | Cape | 1964 |
| On Shannon's shore : a history of Mungret parish | O'Connor, John | Monograph or Collective Volume | Pubblebrien Historical Society | 2003 |
| On the beat : a woman's life in the Garda Síochána | O'Connor, Mary T. | Monograph or Collective Volume | Gill & Macmillan | 2005 |
| On the trail of Irish émigrés in the collections of the Strahov Abbey library in Prague | Kucharová, Hedvika,Parez, Jan, | Article in Book | | 2010 |
| One king to rule them all - Fedlim Ó Conchobair, the battle of Athenry and the kingship of Ireland | Martyn, Adrian | Monograph or Collective Volume | theirishstory.com | 2013 |
| One man's famine : one man's tribute to Brother Paul James O'Connor on his centenary, 17th April 1978 | | Monograph or Collective Volume | The editor | 1977 |
| One of the first recipients of the V.C. | Evans, John | Article in Journal | | 1990 |
| Our Lady of Coogee : Eileen O'Connor and the founding of Sydney's Brown Nurses | O'Connell, Mary | Monograph or Collective Volume | Crossing Press | 2009 |
| Our man in Rome : Peter Lombard, agent of the University of Louvain, at the grand theatre of European politics, 1598-1612 | Boute, Bruno | Article in Book | | 2010 |
| Our place : Meanus and our people : Camogue Rovers | | Monograph or Collective Volume | Camogue G.A.A. Club | 2003 |
| Our roots under the rock : the O'Connor family history, 1833-2006 | O'Connor, Mary | Monograph or Collective Volume | An Ríocht | 2006 |
| Paddy Devlin | Parr, Connal | Article in Book | | 2016 |
| Pádraic Ó Conaire | Ó Cathasaigh, Aindrias | Article in Book | | 2016 |
| Painting Mayo's landscape : the big house, the pleasure grounds and the mills | Kreilkamp, Vera | Article in Book | | 2003 |
| Palmerstown : an ancient place | O'Connor, Nessa | Monograph or Collective Volume | Environmental Publications | 2003 |
| Parnell visits "The Island of America" | O'Connor, John | Article in Journal | | 1971 |
| Parnellites and anti-Parnellites in Kilkenny City | Patterson, Tony | Article in Journal | | 2017 |
| Passing on the torch; a history of Mary Immaculate College, 1898-1998 | O'Connor, Loreto | Monograph or Collective Volume | Mary Immaculate College | 1998 |
| Pat O'Connor, in appreciation | Anonymous | Article in Journal | | 2003 |
| Pat O’Connor : boxer supreme | Tarrant, Con | Article in Journal | | 1996 |
| Patrick O'Higgins | Kinealy, Christine | Article in Book | | 2016 |
| Patrick Trench : Irish socialist in the Second World War. Writings and speeches 1939-1946 | | Monograph or Collective Volume | Socialist Democracy | 2016 |
| Peannphictiúir ceathrar banamhránaithe i ndialanna Sheáin Uí Eochaidh | Ó Laoire, Lillis | Article in Book | | 2019 |
| People make places : the story of the Irish palatines | O'Connor, Patrick J. | Monograph or Collective Volume | Oireacht na Mumhan Books | 1989 |
| Perspectives on death from Irish folklore | O'Connor, Anne | Article in Book | | 2016 |
| Phoenix Paradiso | O'Connor, John | Article in Journal | | 2019 |
| Photographing the evictions on the Vandeleur Estate, Kilrush, July 1888 | O'Shaughnessy, Ed | Article in Journal | | 2015 |
| Photography, tourism and natural history : cultural identity and the visualisation of the natural world | Carville, Justin | Article in Book | | 2003 |
| Pietas Austriaca and ‘Dispensers of Royal Authority’: The early Irish Colleges and Habsburg cultural strategies | Downey, Declan M. | Article in Book | | 2018 |
| Piracy and poverty : aspects of the Irish Jacobite experience in France, 1691-1720 | Bracken, David | Article in Book | | 2001 |
| Pisreoga a bhaineann leis an mbás: superstition and effective human behaviour | Ó Cadhla, Stiofán | Article in Book | | 2019 |
| Pitying the plumage : commemorating 'the flight of the earls' in contemporary and historical contexts | Brady, Ciaran | Article in Book | | 2010 |
| Policeman shot and wounded in Ballyduff on the night of 31st October/1st November 1920, was involved in the Listowel Police Mutiny nineteen weeks earlier | O'Connor, Noel | Article in Journal | | 2003 |
| Policy and propaganda in Hugh O'Neill's connection with Europe | Morgan, Hiram | Article in Book | | 2010 |
| Political activism and the politics of spirituality : the layered identities of Sister Nivedita/Margaret Noble (1867-1911) | Singh, Maina Chawla | Article in Book | | 2006 |
| Politics in a changing Ireland, 1960-2007 : a tribute to Seamus Patterson | O'Connor, Tom,O'Halloran, Anthony | Monograph or Collective Volume | Institute of Public Administration | 2008 |
| Post-primary education : now and in the future | O'Connor, Seán | Article in Journal | | 1968 |
| Pre-norman fortification in eleventh-and twelfth-century Connacht | Naessens, PaulO'Connor, Kieran | Article in Journal | | 2012 |
| Precious paths : the journey within : a journal | O'Connor, Catherine | Monograph or Collective Volume | Precious Paths Publishing | 2017 |
| Prequels: the Irish European diaspora | O'Connor, Thomas | Article in Book | | 2019 |
| Problems of Reform in the Irish Trades Union Congress, 1894-1914 | O'Connor, Emmet | Article in Journal | | 2007 |
| Problems with databases and the XML solution | Clancy, DenisKeating, John G.Lyons, Mary AnnO'Connor, Thomas | Article in Journal | | 2004 |
| Prophecy, storytelling and the otherworld in Togail Bruidne dar Derga | O'Connor, Ralph | Article in Book | | 2008 |
| Protestantism and social identity : the diocese of Ferns 1945-1965 | O'Connor, Catherine | Article in Book | | 2007 |
| Public opinion and the Irish Civil War in Connaught, 1921-1923 | O'Connor, Sanchia Katherine | Thesis | | 2001 |
| Public opinion and the Irish Civil War in Connaught, 1921-23 | O'Connor, Sanchia Katherine | Thesis | | 2000 |
| Public works : the architecture of the office of public works, 1831-1987 | | Monograph or Collective Volume | Architectural Association of Ireland | 1987 |
| Publish or perish : the role of the native press in promoting national identity in Ireland and India | Rosenkranz, Susan | Article in Book | | 2006 |
| Re(writing) the domestic into the everyday | Humphries, Jane | Article in Book | | 2010 |
| Reading between the lines | O'Sullivan, Niamh | Article in Book | | 2010 |
| Recollections of Dun Laoghaire's retail past | O'Connor, Séamus | Article in Book | | 1987 |
| Reconstructing the medieval Irish bookshelf : a case study of Fingal Rónáin and the horse-eared kings | Clarke, Michael | Article in Book | | 2014 |
| Records of the Royal Hospital, Kilmainham | O'Connor, Gregory | Article in Journal | | 1998 |
| Reds and the green : Ireland, Russia and the communist internationals, 1919-43 | O'Connor, Emmet | Monograph or Collective Volume | University College Dublin | 2004 |
| Reds and the green : problems of the history and historiography of communism in Ireland | O'Connor, Emmet | Article in Journal | | 1997 |
| Reframing the republic : republican socio-economic thought and the road to Fianna Fáil, 1923-26 | O'Neill, Timothy M. | Article in Book | | 2015 |
| Religion and identity - the Irish dillema | O'Connor, Thomas | Article in Journal | | 1999 |
| Religious change, 1550-1800 | O'Connor, Thomas | Article in Book | | 2006 |
| Remembering Mainchin Seoighe | O'Connor, Patrick J. | Article in Journal | | 2006 |
| Rent Pressure - an historical study | Garahy, John | Article in Journal | | 2024 |
| Republicanism and radical memory : the O'Connors, O'Carolan and the United Irishmen | Gibbons, Luke | Article in Book | | 2000 |
| Response of the McDonnell clan to change in early seventeenth century Ulster | McDonnell, Hector | Article in Book | | 2003 |
| Retaining relevance through reaction : Muintir na Tíre, 1931-1971 | O'Connor, Raymond | Article in Journal | | 2003 |
| Revd John Reade and Ireland's first Savings Banks | O'Connor, Ray | Article in Journal | | 2024 |
| Review article. Irish traditional dance | Hannan, Robbie | Article in Journal | | 2014 |
| Review article. Irish traditional dance | Hannan, Robbie | Article in Journal | | 2014 |
| Revision : 'labour must wait' : the making of a myth | O'Connor, Lysaght D. R. | Article in Journal | | 2001 |
| Rivalry and reform in the Irish college Paris, 1676-1775 | Chambers, Liam | Article in Book | | 2006 |
| Rock and popular music in Ireland : before and after U2 | McLaughlin, NoelMcLoone, Martin | Monograph or Collective Volume | Irish Academic Press | 2012 |
| Roger O'Connor : an Irishman in the French and papal service | Giblin, Cathaldus | Article in Journal | | 1956 |
| Róisín Dubh: athchuairt | Goan, Cathal | Article in Book | | 2019 |
| Roots of modernity : primitivism and primitive accumulation in nineteenth-century Ireland | Gibbons, Luke | Article in Book | | 2010 |
| Roscommon history and society : interdisciplinary essays on the history of an Irish county | | Monograph or Collective Volume | Geography Publications | 2018 |
| Rotten Prod : the unlikely career of Dongaree Baird | O'Connor, Emmet | Monograph or Collective Volume | University College Dublin Press | 2022 |
| Rugby's Svengali : Mark Sugden | O'Connor, Ulick | Article in Book | | 2003 |
| Saibhriú na cartlainne: liosta taifeadaí obair pháirce | Bale, Anna | Article in Book | | 2019 |
| Scélṡenchus revisited : historical function and literary artistry in the Gaelic Kings' sagas | O'Connor, Raplh | Article in Book | | 2022 |
| Schools folklore project 1937 | Delargey, SeanDuff, AgathaKerrigan, PhyllisMcCarthy, BridgetO'Connor, Bridget | Article in Journal | | 2005 |
| Scotland and Ireland : labour directions
and radical connections | O'Connor, Emmet | Article in Journal | | 2015 |
| Scottish comunities abroad : Some concluding remarks | O'Connor, ThomasSogner, SølviVan Voss, Lex Heerma | Article in Book | | 2005 |
| Screening Irish-America | | Monograph or Collective Volume | Irish Academic Press | 2009 |
| Seán Dowling | Haugh, Dominic | Article in Book | | 2016 |
| Seán Dowling: The Irish Soviet Man | O'Connor Lysaght , D. R. | Article in Book | | 2017 |
| Seán Keating : art politics and building the Irish nation | O'Connor, Éimear | Monograph or Collective Volume | Irish Academic | 2013 |
| Seán Keating in context : responses to culture and politics in post civil war Ireland | Keating, Sean (1889-1977)O'Connor, Éimear | Monograph or Collective Volume | Carysfort Press | 2009 |
| Seán Murray | O'Connor, Emmet | Article in Book | | 2016 |
| Seán O’Connor, gentleman, artist and antiquarian | Nolan, Chriss | Article in Journal | | 1994 |
| Sean Reid, 1907-78 : a pivotal role in traditional music | O'Connor, Mike | Article in Journal | | 1991 |
| Searching for the inclusive growth tax grail : the distributional impact of growth enhancing tax reform in Ireland | Haugh, DavidHynes, TerenceLenain, PatrickO'Connor, Brendan | Article in Journal | | 2016 |
| Searching for the moral in Bruiden Meic Da Réo | O'Connor, Ralph | Article in Journal | | 2006 |
| Seeking the 'real' Irish revolution | Lysaght, D.R. O'Connor | Article in Journal | | 2013 |
| Select Documents III. Agreement between Ó Domhnaill and Tadgh Ó Conchobhair concerning Sligo Castle (23 June 1539) | | Article in Journal | | 1943 |
| Seraphic sparks : The Irish Franciscan and Capuchin Colleges on the Continent | Mac Craith, Mícheál | Article in Book | | 2018 |
| Settlement in Gaelic Ireland, 1100-1350 | O'Connor, Kieran | Article in Journal | | 2021 |
| Seventeenth-century Ireland and Scotland and their wider worlds | Ohlmeyer, Jane H. | Article in Book | | 2006 |
| Sexing the nation : discourses of the dancing body in Ireland in the 1930s | O'Connor, Barbara | Article in Journal | | 2005 |
| Shades of difference : towards an analysis of the spatial ideologies of the Orange and Saffron Orders in Northern Ireland and India | Mathur, Chandana | Article in Book | | 2006 |
| Sheep in wolves' clothing : labour and politics in Belfast, 1881-1914 | O'Connor, Emmet | Article in Book | | 2008 |
| Sheep talk : a conversation between Alfred "Cap" Collier and John D. O'Connor | O'Connor, John | Article in Journal | | 2004 |
| Siemens-Schuckert and the electrification of the Irish Free State | O'Beirne, GeraldO'Connor, Michael | Article in Book | | 2002 |
| Siemens-Schuckert and the electrification of the Irish Free State | O'Beirne, GeraldO'Connor, Michael | Article in Book | | 2002 |
| Sinéad O'Connor: the story of a voice | Nolan, Emer | Article in Journal | | 2010 |
| Sinn Féin and the Gadar Party in the Indo-German conspiracy of the First World War | Plowman, Matthew Erin | Article in Book | | 2006 |
| Sir Amthony St Leger and the outbreak of the Midland Rebellion, 1547-8 | Bryson, Alan | Article in Journal | | 2013 |
| Sir Luke O'Connor | Smith, Des | Article in Journal | | 1990 |
| Sisters of secession : the unclaimed legacies of two Southern American Irish women | Giemza, Bryan | Article in Journal | | 2010 |
| Sisters' memories | Egan, MayO'Connor, Philippa, Sr. | Article in Journal | | 1997 |
| Skenakilla history | Moroney, NoraO'Connor, Jim | Article in Journal | | 1993 |
| Sleep soldier sleep: the life and times of Padraig O'Connor | Connolly, FrankO'Connor, Diamuid, | Monograph or Collective Volume | Miseab Publications | 2011 |
| SMA missionaries of Northern Nigeria, 1907-1934 | O'Connor, Edward | Monograph or Collective Volume | SMA Fathers | 2007 |
| Small lives : photographs of Irish childhood, 1860-1970 | | Monograph or Collective Volume | Gill & Macmillan | 2012 |
| Snátha i seanchas na mallacht | Ó Héalaí, Pádraig | Article in Book | | 2019 |
| So long to Coolanoran | O'Connor, Patrick J. | Monograph or Collective Volume | Oireacht na Mumhan Books | 2011 |
| Solar eclipses visible in Ireland between A.D. 400 and A.D. 1000 | O'Connor, F. J. | Article in Journal | | 1952 |
| Some developments in infant education in the early twentieth century | O'Connor, Maura | Article in Journal | | 1985 |
| Some guides to the Irish scene | O'Connor, Patrick J. | Monograph or Collective Volume | Oireacht na Mumhan Books | 1992 |
| Some letters of John P Leahy O.P., regarding 'The Obnoxious Clause' of the Catholic Relief Bill 1829 | Cunningham, John M.
| Article in Journal | | 2022 |
| Some notes on Hutcheson Macauley Posnett, 1855-1927 | Leerssen, J. Th. (Joep) | Article in Book | | 2010 |
| Sources of Irish-American genealogy in New England | Daly, Marie E. | Article in Book | | 1985 |
| Spanish documents relating to Ó Concobhair Failghe, 1761-1776 | Hazzard, Benjamin | Article in Journal | | 2022 |
| Speech of Roger Casement from the dock | Casement, Roger David | Monograph or Collective Volume | Fergus O'Connor | 1916 |
| Springfield Cottage. Paupish | O'Connor, Eugene | Article in Journal | | 2024 |
| Sr Concepta Lynch OP (1874-1939) : a unique contribution to Irish art | Bhreathnach-Lynch, Síghle | Article in Book | | 2010 |
| St Columban's Society : the modern disciples of the saint | O'Connor, Patrick | Article in Book | | 1951 |
| St. Mary's Abbey, Ballyhaunis | O'Connor, John | Monograph or Collective Volume | Augustinian Community | 1983 |
| Steam engines make a comeback | O'Connor, Tom | Article in Journal | | 2012 |
| Still changing places : women's paid employment and gender roles | O'Connor, Pat | Article in Journal | | 2007 |
| Stillorgan Heritage Week report | O'Connor, Anne | Article in Journal | | 2010 |
| Stories my mother told me: collecting folklore from a woman of Clonmel, Co. Tipperary | O'Connor, Anne | Article in Book | | 2019 |
| Strangers to citizens : the Irish in Europe, 1600-1800 | Lyons, Mary AnnO'Connor, Thomas | Monograph or Collective Volume | National Library of Ireland | 2008 |
| Stuart Ireland, catholic and puritan | O'Connor, G. B. | Monograph or Collective Volume | | 1910 |
| Studies in irish radical leadership: lives on the left | | Monograph or Collective Volume | Manchester University Press | 2016 |
| Studies on Frank O'Connor, with a bibliography of his writings | Sheehy, Maurice P. | Monograph or Collective Volume | Gill & Macmillan | 1969 |
| Study of Kilmaclasser area, church and graveyard | O'Connor, Sal | Article in Journal | | 2000 |
| Surnames of county Kerry | O'Connor, Tommy | Article in Journal | | 1995 |
| Surviving the Civil Constitution of the Clergy : Luke Joseph Hooke's revolutionary experiences | O'Connor, Thomas | Article in Journal | | 1996 |
| Sweetie : how Haughey spent the money | O'Connor, Kevin | Monograph or Collective Volume | K.O. Publications | 1999 |
| Sydney Owenson's Wild Indian Girl | O'Connor, Maureen | Article in Journal | | 2005 |
| Syndicalism in Ireland, 1917-1923 | O'Connor, Emmet | Monograph or Collective Volume | Cork University Press | 1988 |
| T. P. O'Connor and The Star, 1886-90 | Sheehy, Ian D. | Article in Book | | 2004 |
| T.P. O'Connor | Fyfe, H. H. | Monograph or Collective Volume | | 1934 |
| T.P. O'Connor and the Liverpool Irish | Brady, L. W. | Monograph or Collective Volume | Royal Historical Society | 1984 |
| Taking its natural place: Labour and the third Home Rule crisis, 1912-1914 | O'Connor, Emmet | Article in Journal | | 2012 |
| That dangerous serpent: Garibaldi and Ireland, 1860-1870 | O'Connor, Anne | Article in Journal | | 2002 |
| That Irishman : the life and times of John O'Connor Power | Stanford, Jane | Monograph or Collective Volume | History Press Ireland | 2011 |
| The 'sacred isle' of saints and scholars revisited : exploring Irish spirituality, religious folklore and cultural identity | O'Connor, Anne | Article in Book | | 2012 |
| The Abbey portraits | O'Connor, Ulick | Article in Journal | | 2004 |
| The age of the red republic : the Irish left and Nationalism, 1909-36 | O'Connor, Emmet | Article in Journal | | 2005 |
| The archaeology of medieval rural settlement in Ireland | O'Connor, Kieran Denis | Monograph or Collective Volume | Royal Irish Academy | 1998 |
| The art and science of political economy : Nassau Senior and Ireland in the 1830s | Boylan, Ciara M.Boylan, Thomas A. | Article in Book | | 2010 |
| The backward look : a survey of Irish literature | O'Connor, Frank | Monograph or Collective Volume | Macmillan | 1967 |
| The beauties of the press, with an appendix concerning the speech of Arthur O'Connor, on the Catholic question ... May 4, 1775; also, his letter to Lord Castlereagh | Anonymous | Monograph or Collective Volume | | 1800 |
| The big fellow : a life of Michael Collins | O'Connor, Frank | Monograph or Collective Volume | Nelson | 1937 |
| The big fellow : Michael Collins and the revolution | O'Connor, Frank | Monograph or Collective Volume | Clonmore & Reynolds | 1965 |
| The booing Of Sinead O'Connor : Bob Dylan 30th anniversary concert, Madison Square Garden, New York, October 16, 1992 | Mayhew, Emma | Article in Book | | 2006 |
| The Boston Irish : a political history | O'Connor, Thomas H. | Monograph or Collective Volume | North Eastern University Press | 1995 |
| The Boyneland | O'Connor, Declan | Article in Journal | | 2008 |
| The Brehon Law School at Park | Jennings, Margaret | Article in Book | | 2006 |
| The brown-robed Irish Army | Isacsson, Alfred, O.Carm. | Article in Journal | | 2010 |
| The Capt. Cornelius O'Connor house in Homer : a symbol for the Dakota county Irish | Kuhlman, Thomas A. | Article in Journal | | 1982 |
| The Catholic Church and Catholics in an era of sanctions and restraints, 1690–1790 | O'Connor, Thomas | Article in Book | | 2018 |
| The Church of Ireland diocese of Ferns, 1945-65 : a female perspective | O'Connor, Catherine | Article in Book | | 2008 |
| The colours we wore | O'Dowd, Anne | Article in Book | | 2019 |
| The communists and the Irish revolution, part 1 : the Russian revolutionaries on the Irish national question, 1889-1924 | O'Connor, Lysaght D. R. | Monograph or Collective Volume | [s.n.] | 1993 |
| The communists and the Irish revolution. Part 1 : the Russian revolutionaries on the Irish national question, 1889-1924, includes works by Lenin, Trotsky, Radek, Chicherin, and statements by the Communists International | | Monograph or Collective Volume | Literéire Publishers | 1993 |
| The complementary merits of valuation, census and cartographic data in revealing Ireland c.1850 | O'Connor, Mary B. | Article in Journal | | 1998 |
| The conflict between Flood and Grattan, 1782-3 | O'Connor, Theresa M. | Article in Book | | 1949 |
| The contribution of Séamus Ó Cinnéide to the School's Folklore Collection, 1937-8 | Nolan, William | Article in Book | | 2019 |
| The counter-revolution and Franco-Irish solidarity : Irish clerical refugees at the universities of Toulouse and Cahors in the seventeenth and eighteenth centuries | Ferté, Patrick | Article in Book | | 2006 |
| The cutting edge : Derry shirtmakers | Finlay, Andrew | Article in Book | | 1987 |
| The D'Arcys of New Forest | McCarthy, Gerard | Article in Book | | 2006 |
| The Defenders and Lawrence O'Connor | Kelly, Martin J. | Article in Journal | | 1972 |
| The demise of the Irish fair, 1853 to the present | O'Connor, David | Article in Journal | | 1993 |
| The destruction of Da Derga's hostel : kingship and narrative artistry in a mediaeval Irish saga | O'Connor, Ralph | Monograph or Collective Volume | Oxford University Press | 2013 |
| The development of infant education in Ireland, 1838-1948 : epochs and eras | O'Connor, Maura | Monograph or Collective Volume | Peter Lang | 2010 |
| The devotional world of the Irish Catholic exile in early-modern Galicia, 1598-1666 | O'Scea, Ciaran | Article in Book | | 2001 |
| The difficulties in coping with parish registers as a genaelogical source | O'Connor, Thomas, of County Kerry | Article in Journal | | 1992 |
| The dispersal of the country house collections of Ireland | O'Connor, Cynthia | Article in Journal | | 1992 |
| The domestic and international roles of Irish overseas colleges, 1590-1800 | O'Connor, Thomas | Article in Book | | 2017 |
| The Dublin National Shell Factory 1915-1918 - a family connection | O'Connor, Clive | Article in Journal | | 2013 |
| The early failures of the Irish College Rome, 1628–78 | Binasco, Matteo | Article in Book | | 2018 |
| The early years of the North Kerry Hurling Board | O'Connor, Tommy | Article in Journal | | 2024 |
| The early-modern Irish college network in Iberia, 1590-1800 | O Connell, Patricia | Article in Book | | 2001 |
| The Emancipator in the mirror of folk narrative: projection and prejudice in an anecdote about Daniel O'Connell | Hillers, Barbara | Article in Book | | 2019 |
| The embargo on the export of Irish provisions, 1776-9 | O'Connor, Theresa M. | Article in Journal | | 1940 |
| The emergence of an Irish community in Saint-Malo, 1550-1710 | Lyons, Mary Ann | Article in Book | | 2001 |
| The emperor and the Irishman : Napoleon and Dr Barry O'Meara on St Helena | O'Connor, Hubert | Monograph or Collective Volume | A. & A. Farmar | 2008 |
| The English Benedictines in Eighteenth-Century Lorraine | Richard-Maupillier, Frédéric | Article in Book | | 2018 |
| The enigma as exemplar : Walter Butler (d.1638) and Schiller's Wallenstein (1799) | Krobb, Florian | Article in Book | | 2010 |
| The Europe that the earls encountered | Bergin, Joseph | Article in Book | | 2010 |
| The exile and repatriation of Father Dominic O'Connor (O.F.M. Capuchin), 1922-58 | Borgonovo, John | Article in Journal | | 2017 |
| The experience of women in the rebellion of 1798 in Wexford | O'Connor, Catherine | Article in Journal | | 2003 |
| The famine in KIlkerrin | Noone, Anna | Article in Book | | 2006 |
| The feast days of the Blessed Virgin: Séamas Mac Cuarta's forgotten 'decade' | Watson, Seosamh | Article in Book | | 2019 |
| The fight against T.B. in Ireland in the 1940s | O'Connor, Charles | Monograph or Collective Volume | Charles, O'Connor | 1994 |
| The flight of the earls in British-Spanish diplomacy | Lennon, Colm | Article in Book | | 2010 |
| The Franciscan Monastry of Kilkerrin | O'Rourke, Annette | Article in Book | | 2006 |
| The Gaelic tradition in literature | O'Connor, Frank | Article in Journal | | 1938 |
| The Galway Augustinians, Vol 1 : an abbey dies | O'Connor, John | Monograph or Collective Volume | Good Counsel Press | 1979 |
| The Grand Jury and urban development in 19th century Mallow town | O'Connor, Laura | Article in Journal | | 2012 |
| The Gresham Hotel, 1865-1965 | O'Connor, Ulick | Monograph or Collective Volume | Gresham Hotel | 1965 |
| The growing demand for Catholic education in the eighteenth century, leading to the establishment of St. Patrick's, Maynooth in 1795 | O'Connor, R. | Article in Journal | | 1981 |
| The iconography of the southern lunette in Ardmore Cathedral, Co. Waterford | O'Connor, Donal | Article in Journal | | 2008 |
| The impact of migration on national identity in a globalized world : a comparison of civic education curricula in England, France and Ireland | Faas, DanielO'Connor, Laura | Article in Journal | | 2012 |
| The inauguration of O'Conor | | Article in Book | | 1961 |
| The influence of Redmondism on the development of the labour movement in Waterford in the 1890's | O'Connor, Emmet | Article in Journal | | 1979 |
| The IRA repudiates the authority of Dáil Éireann | Connell, Joseph E.A.Jr | Article in Journal | | 2022 |
| The Irish at the Jacobite court of Saint-Germain-en-Laye | Corp, Edward T. | Article in Book | | 2001 |
| The Irish Augustinians in Ecuador, 1977-1992 | O'Connor, Paul G. | Article in Book | | 1994 |
| The Irish Citizen Army 1913-16 : White, Larkin and Connolly | Lysaght, D. R. O'Connor | Article in Journal | | 2006 |
| The Irish College in Paris : from penal days seminary to Irish cultural centre | O'Connor, Patrick | Article in Book | | 2009 |
| The Irish colleges on the continent and the creation of an educated clergy | Brockliss, Laurence W. B. | Article in Book | | 2010 |
| The Irish community in eighteenth-century Cadiz | Fannin, Samuel | Article in Book | | 2003 |
| The Irish dancing : cultural politics and identities, 1900-2000 | O'Connor, Barbara | Monograph or Collective Volume | Cork University Press | 2013 |
| The Irish element in America | O'Connor, R. C. | Article in Journal | | 1910 |
| The Irish Franciscans in seventeenth and eighteenth-century Prague | Parez, Jan | Article in Book | | 2003 |
| The Irish in Boston | O'Connor, Thomas H. | Article in Journal | | 1979 |
| The Irish in Britain | O'Connor, Kevin | Monograph or Collective Volume | Sidgwick | 1972 |
| The Irish in Britain | O'Connor, Kevin | Monograph or Collective Volume | Sidgwick & Jackson | 1972 |
| The Irish in Europe, 1580-1815 | | Monograph or Collective Volume | Four Courts | 2001 |
| The Irish in France 1660-90 : the point of no return | O'Ciosáin, Éamon | Article in Book | | 2006 |
| The Irish in Leicester : an invisible community? | O'Connor, Henrietta | Article in Book | | 1995 |
| The Irish in New England | O'Connor, Thomas H. | Article in Journal | | 1985 |
| The Irish in New England | O'Connor, Thomas H. | Monograph or Collective Volume | New England Historic Genealogical Society | 1985 |
| The Irish in New England | O'Connor, Thomas H. | Article in Book | | 1985 |
| The Irish in Paris at the end of the ancien régime | Swords, Liam | Article in Book | | 2001 |
| The Irish Labour History Society : an outline history | O'Connor, Emmet | Article in Journal | | 2010 |
| The Irish literary renaissance (1880-1904) and the New Irishman | O'connor, Ulick | Article in Journal | | 2003 |
| The Irish provision trade during the war of the American revolution | O'Connor, T. M. | Article in Journal | | 1939 |
| The Irish? a destroyer of pro-English arguments | O'Connor, W. J. | Monograph or Collective Volume | [s.n.] | 1914 |
| The ITGWU and the WUI in the 1950s | Desmond, Barry | Article in Book | | 2013 |
| The Kennedys of Massachusetts | Galvin, Edward L. | Article in Book | | 1985 |
| The Kildare Place Society : an influential force in 19th century Irish tradition | Coghlan, Valerie,O'Connor, Geraldine | Article in Book | | 2009 |
| The king of spring : the life and times of Peter O'Connor | Quinn, Mark | Monograph or Collective Volume | Liffey Press | 2004 |
| The King of Spring: The Life and Times of Peter O'Connor | Quinn, Mark | Monograph or Collective Volume | The Liffey Press | 2004 |
| The knights of Glin : seven centuries of change | | Monograph or Collective Volume | Glin Historical Society | 2009 |
| The labour movement in Waterford city 1913-1923 | O'Connor, Emmet | Article in Journal | | 1981 |
| The last kings of Ireland | O'Grady, Standish | Article in Journal | | 1889 |
| The later medieval usage of crannogs in Ireland | Brady, NiallO'Connor, Kieran Denis | Article in Book | | 2005 |
| The letters of Charles O'Connor of Belanagare; vol. 1 : 1731-1771 | O'Connor, CharlesWard, C. C.Ward, Robert E. | Monograph or Collective Volume | UMI, Monographs for the Irish American Cultural Institute | 1980 |
| The life and death of Edward Fitzgerald | Moore, Thomas, 1779-1852 | Monograph or Collective Volume | | 1831 |
| The life and times of a rural parish priest, 1896-1908 | Higgins, Seán | Article in Book | | 2006 |
| The life of J. J. O'Connor, a pioneer of technical education | Lysaght, Jimmy | Article in Journal | | 2006 |
| The local railway of Lixnaw | O'Connor, Noel | Article in Journal | | 2000 |
| The making of Wexford Opera House | O'Connor, Matt | Article in Journal | | 2010 |
| The maturation of town and village life in county Limerick, 1700-1900 | O'Connor, Patrick J. | Article in Book | | 1988 |
| The mayor/admiral of Claddagh | Cunningham, John, 1957- | Article in Book | | 2016 |
| The mayor/admiral of Claddagh | Cunningham, John, 1957- | Article in Book | | 2016 |
| The medieval Irish Wandering of Ulysses between literacy and orality | Hilliers, Barbara | Article in Book | | 2014 |
| The Monasteranenagh miracle (1579) : an Irish legend in a south German abbey church | Stoll, Peter | Article in Book | | 2010 |
| The more immediate effects of the American revolution in Ireland, 1775-85 | O'Connor, Theresa M. | Thesis | | 1938 |
| The motte-and-bailey castle at Lissardowlan, Co. Longford | De Meulemeester, J.O'Connor, Kieran | Article in Book | | 2007 |
| The Munster plantation era : rebellion, survey and land transfer in north county Kerry | O'Connor, P. J. | Article in Journal | | 1982 |
| The Munster Soviet creameries | O'Connor, Lysaght D. R. | Article in Journal | | 1981 |
| The Munster soviet creameries | O'Connor Lysaght, D. R. | Article in Journal | | 1981 |
| The mystery of James O'Connor | McGowan, Joe | Article in Journal | | 2016 |
| The national flag | O'Connor, P. | Article in Journal | | 1946 |
| The northern flight : Irish soldiers in seventeenth-century Scandinavia | Murdoch, Steve | Article in Book | | 2010 |
| The Nottingham Electorate and the Election of the Chartist, Feargus O'Connor, 1847 | Binder, Che | Article in Journal | | 2003 |
| The O'Connor family of Caherowen, Athenry, Co. Galway | Ó Deirg, Íosold | Article in Journal | | 1998 |
| The O'Connor Henchys of Stonebrook | Hussey-Walsh, V. | Article in Journal | | 1899 |
| The O'Connor papers | Dunleavy, G. W. (Gareth W.)Dunleavy, J. E. (Janet Egleson) | Monograph or Collective Volume | University of Wisconsin Press | 1977 |
| The O'Connor tragedy of 1890 | Lowth, Cormac | Article in Journal | | 2001 |
| The O'Connors | Pierce, Thomas | Article in Journal | | 1956 |
| The O'Connors of Swinford County Mayo : a family history | O'Connor, Patrick | Monograph or Collective Volume | Old House | 1998 |
| The O'Conor papers : their significance to genealogists | Dunleavy, G. W. (Gareth W.) | Article in Journal | | 1976 |
| The old age of a poet | O'Connor, Frank | Article in Journal | | 1941 |
| The old Borough of Tuam - the corporation and its charter | O'Connor, Gabriel | Article in Journal | | 2012 |
| The O’Connor septs | Murphy, Seán | Article in Journal | | 1995 |
| The Parnell movement : with a sketch of Irish parties from 1843 | O'Connor, T. P. | Monograph or Collective Volume | | 1886 |
| The parody of the School of Athens : the Irish connection | O'Connor, Cynthia | Article in Journal | | 1983 |
| The paruchia of St. Finbarr | O'Connor, Timothy P. | Thesis | | 1977 |
| The Picture of Dorian Gray as Irish national tale | O'Connor, Maureen | Article in Book | | 2003 |
| The pioneers : Big Jim Larkin | O'Connor, Emmet | Article in Book | | 2013 |
| The pioneers : Larkin and O'Brien : the story of a feud | Lysaght, D. R. O'Connor | Article in Book | | 2013 |
| The pioneers : William O'Brien | Byrne, Brendan | Article in Book | | 2013 |
| The pioneers : Young Jim Larkin | O'Riordan, Manus | Article in Book | | 2013 |
| The pleasing hours : a grand tour of James Caulfeild, 1st Earl of Charlemont (1728-1799) : traveller, connoisseur and patron of the arts | O'Connor, Cynthia | Monograph or Collective Volume | Collins Press | 1999 |
| The plight of the earls : Tyrone and Tyrconnell's 'Grievances' and Crown coercion in Ulster, 1603-7 | Edwards, David, 1963- | Article in Book | | 2010 |
| The pope, the prelate, the soldiers and the controversy : Paul Cullen and the Irish Papal Brigade | O'Connor, Anne | Article in Book | | 2011 |
| The promotion of a Limerick linen industry : 1760-1763 | O'Connor, Patrick J. | Article in Journal | | 1989 |
| The rake's progress of a syndicalist : The political career of William O'Brien, Irish labour leader | Lysaght, D. R. O'Connor | Article in Journal | | 1983 |
| The rakes' progress of a syndicalist : the political career of William O'Brien, Irish labour leader | O'Connor Lysaght, D. R. | Article in Journal | | 1983 |
| The Ray dynasty : Irish mercantile builders in Ostend, 1690-1790 | Parmentier, Jan | Article in Book | | 2006 |
| The Real Colegio de San Patricio de Nobles Irlandeses of Salamanca : its buildings and properties, 1592-1768 | Almajano, Nieves RupérezSantamaría, Ana Castro | Article in Book | | 2010 |
| The rebellion of James Eustace, Viscount Baltinglass III, 1580-81 | O'Connor, Elizabeth Ann | Thesis | | 1989 |
| The reformation of the labour movement in Waterford : from new model unionism to Larkinism | O'Connor, Emmet | Article in Journal | | 1979 |
| The republic of Ireland | O'Connor, Lysaght D. R. | Monograph or Collective Volume | Mercier Press | 1970 |
| The revolution in girls' secondary education in Ireland, 1860-1910 | O'Connor, Anne V. | Article in Book | | 1987 |
| The rhetoric of Redmondism 1914-16 | Lysaght, D. R. O'Connor | Article in Journal | | 2003 |
| The rise of a rural village | Corless, Catherine | Article in Book | | 2006 |
| The role of Castilian royal bureaucracy in the formation of early-modern Irish literacy | O'Scea, Ciaran | Article in Book | | 2006 |
| The role of Irish clerics in Paris University politics 1730-40 | O'Connor, Thomas | Article in Journal | | 1999 |
| The Roundwood Healyites, an unseemly row in the Chapel yard | 'The Glendalough Goose' | Article in Journal | | 1997 |
| The royal O'Connors of Connaught | O'Connor, Patrick | Monograph or Collective Volume | Old House Press | 1997 |
| The scheme : the Christian Brothers and child care in Western Australia | Coldrey, Barry M. | Monograph or Collective Volume | Argyle-Pacific | 1993 |
| The Scots in the Italian peninsula during the Thirty Years War | Marks, Richard Adam | Article in Book | | 2010 |
| The seigniory of Castleisland in the seventeenth century | O'Connor, Patrick | Article in Journal | | 1970 |
| The Selected Writings of Maurice O’Connor Drury On Wittgenstein, Philosophy, Religion and Psychiatry | Drury, Maurice O’Connor | Monograph or Collective Volume | Bloomsbury Academic | 2017 |
| The significance and legacy of Spanish intervention in west Munster during the battle of Kinsale | O'Scea, Ciaran | Article in Book | | 2003 |
| The sinking of the RMS Leinster - a Mallow connection | Sheehan, Patrick T. | Article in Journal | | 2018 |
| The soul of man under socialism | Lysaght, D. R. O'ConnorWilde, Oscar O'Flahertie Wills, 1854-1900 | Monograph or Collective Volume | Socialist Democracy | 2005 |
| The Spanish Court, Ecclesiastical Patronage, and the Irish College of Santiago de Compostela (1611–17) | O’Scea, Ciaran | Article in Book | | 2018 |
| The state of Ireland | Livesey, JamesO'Connor, Arthur | Monograph or Collective Volume | Lilliput | 1998 |
| The state of Ireland : to which are added his address to the electors of the county of Antrim | O'Connor, Arthur | Monograph or Collective Volume | | 1798 |
| The Steampacket Company strike | Connolly, James, 1868-1916 | Monograph or Collective Volume | D. R. O'Connor Lysaght | 2013 |
| The story of the Canon Sheehan monument at Doneraile | O'Connor, J. J. | Article in Journal | | 1946 |
| The story of the Limerick Soviet | O'Connor, Lysaght D. R. | Monograph or Collective Volume | People's Democracy | 1979 |
| The story of the Limerick Soviet | Lysaght, D. R. O'Connor | Monograph or Collective Volume | Limerick Soviet Commemoration Committee | 2003 |
| The story of the Limerick Soviet: the 1919 general strike against British militarism | O'Connor, Lysaght D. R. | Monograph or Collective Volume | The Limerick Soviet Commemoration Committee | 2019 |
| The strangest story of the great Irish motorcycle | Myatt, Steven | Article in Journal | | 2011 |
| The Tailors' Hall | O'Connor, Consuelo | Article in Book | | 2005 |
| The tithe applotment books as a Co. Kerry genealogical source | O'Connor, Thomas, of County Kerry | Article in Journal | | 1996 |
| The topography of Ardmore's ecclesiastical site in W.H. Brooke's drawing of the round tower (1824) | O'Connor, Dónal | Article in Journal | | 2010 |
| The townland of Ballaghduff | Collins, Josephine | Article in Book | | 2006 |
| The transformation of the Irish College, Paris: war, education, and administration, 1870–1918 | Stover, Justin Dolan | Article in Book | | 2018 |
| The trouble with France: Making Scots priests in France, 1818–78 | Saarinen, Iida | Article in Book | | 2018 |
| The troubles : Michael Collins and the volunteers in the struggle for Irish freedom, 1912-1922 | O'Connor, Ulick | Monograph or Collective Volume | Mandarin | 1996 |
| The Tuam hunger strike - the ultimate weapon | O'Connor, Gabriel | Article in Journal | | 2013 |
| The Ulick O'Connor diaries, 1970-1981 : a cavalier Irishman | O'Connor, Ulick | Monograph or Collective Volume | John Murray | 2001 |
| The Ulster earls and baroque Europe : refashioning Irish identities, 1600-1800 | | Monograph or Collective Volume | Four Courts | 2009 |
| The union in party politics | Purséil, Niamh | Article in Book | | 2013 |
| The United Irishmen & Hamburg | Weber, Paul | Article in Journal | | 1997 |
| The United Irishmen, their lives and times. 7 vols. | Madden, Richard Robert | Monograph or Collective Volume | J. Madden & Co. | 1842 |
| The Victorians, the Americans and the decline of Spain | Brady, Ciarán | Article in Book | | 2006 |
| The visual context of Ríonach uí Ógáin's photographic work | Mac Cárthaigh, Críostóir | Article in Book | | 2019 |
| The Volunteers 1778-1793 : iconography and identity | O'Connor, Stephen | Thesis | | 2008 |
| The Volunteers of Dublin, 1778-84 : a short study of urban volunteering | O'Connor, Stephen | Article in Book | | 2008 |
| the wages of bigamy (1663) | O'Connor, Thomas | Article in Book | | 2019 |
| The wild geese. Pen portraits of famous Irish exiles | Griffin, Gerald | Monograph or Collective Volume | | 1938 |
| The workhouses of Ireland : the fate of Ireland's poor | O'Connor, John | Monograph or Collective Volume | Anvil | 1995 |
| The working class movement library Manchester | O'Connor, Emmet | Article in Journal | | 1982 |
| The world of labour in the early nineteenth century | O'Connor, Emmet | Article in Book | | 2002 |
| The Yeats companion | O'Connor, Ulick | Monograph or Collective Volume | Pavilion Books | 1990 |
| The ‘British Establishments’, the Irish college in Paris and Restoration France, 1814–30 | Chambers. Liam | Article in Book | | 2018 |
| Thesis abstract : Irish clerics in the University of Paris, 1570–1770 | O'Connor, Priscilla | Article in Journal | | 2007 |
| Thomas Foran, 1883-1951 | Lysaght, D. R. O'Connor | Article in Journal | | 2005 |
| Thomas Messingham (c.1575-1638?) and the seventeenth-century church | O'Connor, Thomas | Article in Journal | | 2000 |
| Thomas O'Connor of the Ordnance Survey | Morris, Henry | Article in Journal | | 1937 |
| Thomas O'Connor: An Appreciation | Lyons, Mary Ann | Article in Journal | | 2022 |
| Thou shalt not kill : true-life stories of Irish murders | O'Connor, KevinOthers | Monograph or Collective Volume | Gill & Macmillan | 1995 |
| Thou shalt not kill : true-life stories of Irish murders | O'Connor, Kevin | Monograph or Collective Volume | Gill & Macmillan | 1994 |
| Through a glass, darkly - new light on north-west Europe dead-child traditions | O'Connor, Anne | Article in Book | | 2001 |
| Timothy Turner an eighteenth-century Dublin ironsmith | O'Connor, Miriam | Article in Journal | | 1996 |
| To Hell or to Purgatory? Irish folk religion and post-Tridentine counter-reformation Catholic teachings | O'Connor, Anne | Article in Journal | | 2012 |
| Tomás MacGiolla | Hanley, Brian | Article in Book | | 2016 |
| Tomorrow was another day | O'Connor, Séamus | Monograph or Collective Volume | Anvil | 1970 |
| Towards the invention of the Irish Catholic natio : Thomas Messingham's Florilegium (1624) | O'Connor, Thomas | Article in Journal | | 1999 |
| Trade unions and 1968 | O'Connor, Emmet | Article in Book | NA | 2009 |
| Trades councils in Waterford city | O'Connor, Emmet | Article in Book | | 1992 |
| Transatlantic connections: Richard Longfield, Arthur O'Connor and Frederick Douglas | Coughlan, Ann | Article in Journal | | 2015 |
| Transition and change in the mid-west of Ireland | O'Connor, Joyce | Monograph or Collective Volume | [s.n.] | 1983 |
| Translating the Vatican : Paul Cullen, power and language in nineteenth-century Ireland | O'Connor, Anne | Article in Journal | | 2014 |
| Translating the Vatican : Paul Cullen, power and language in nineteenth-century Ireland | O'Connor, Anne | Article in Journal | | 2014 |
| Trial by combat 1583 | Danaher, Kevin, 1913-2002 | Article in Journal | | 1964 |
| Triumphant failure: the return of the Irish Papal Brigade to Cork, November 1860 | O'Connor, Anne | Article in Journal | | 2009 |
| Trois grandes biographies irlandaises | Rivoallan, A. | Article in Journal | | 1941 |
| True Bolsheviks? the rise and fall of the Socialist Party of Ireland, 1917-21 | O'Connor, Emmet | Article in Book | | 2004 |
| Tuam Town Commissioners : their finest hour, 1899-1925 | O'Connor, Gabriel | Article in Book | | 2014 |
| Tuam Town Commissioners: a time of change and continuity, 1899-1924 | O'Connor, Gabriel | Article in Journal | | 2007 |
| Tudor Drogheda 1534-1603 | O'Connor, Susan | Article in Journal | | 1996 |
| Tulsk Abbey | Keegan, MarkO'Connor, KieranTiernan, Padraig | Article in Journal | | 1996 |
| Two controverted Cork parliamentary elections and a broadsheet poem in the Irish language | Holohan, Patrick | Article in Journal | | 2008 |
| Tyrone volunteers in the Connolly Column in the Spanish Civil War | O'Connor, Emmet | Article in Journal | | 2017 |
| Ulster 'will not fight' : T. P. O'Connor and the third Home Rule bill crisis, 1912-14 | Doherty, Erica S. | Article in Book | | 2014 |
| Un Irlandés con Bolívar : recuerdos de la independencia de América del Sur en Venezuela, Colombia, Bolivia, Perú y la Argentina, por un jefe de la legión Británica de Bolívar | O'Connor, Francisco Burdett | Monograph or Collective Volume | El Cid Editor | 1977 |
| Underwater archaeology | O'Connor, Nessa | Article in Journal | | 1989 |
| Unfulfilled reknown : Thomas Preston (1860-1900) and the Anomalous Zeeman Effect | O'Connor, S.Weaire, Denis | Article in Journal | | 1987 |
| Varieties of Irishness in eighteenth-century Seville : Wisemans and Whites | Murphy, Martin | Article in Book | | 2006 |
| Victims of the Lusitania were buried in our parish | O'Connor, Noel | Article in Journal | | 2000 |
| Victorian ideologies of improvement : Sir Charles Trevelyan in India and Ireland | Boylan, Ciara M. | Article in Book | | 2006 |
| Visionary gleam : Corkery and the O'Connor generation | Peterson, Richard F. | Article in Journal | | 1997 |
| Voice of experience 5 : "For the first time Irish workers looked down on the city they created" | O'Brien, May | Article in Book | | 2013 |
| Voices of experience 1 | Dwane, John | Article in Book | | 2013 |
| Voices of experience 2 | Cullen, Jimmy | Article in Book | | 2013 |
| Voices of experience 3 | Hunter, George | Article in Book | | 2013 |
| Voices of experience 4 | O'Neill, Brendan | Article in Book | | 2013 |
| Voices of experience 6 | Corr, Denis | Article in Book | | 2013 |
| Walls within walls - nuns in 19th century Ireland | Clear, Caitríona | Article in Book | | 1987 |
| War and syndicalism 1914-1923 | O'Connor, Emmet | Article in Book | | 1994 |
| Was Classical imitation necessary for the writing of large-scale Irish sagas? Reflections on Táin Bó Cúailnge and the 'watchman device' | O'Connor, Ralph | Article in Book | | 2014 |
| Was the 'Monk's Road' covered over in the early 9th century to protect Rattoo? | O'Connor, Noel | Article in Journal | | 2003 |
| Waterford and IRA gun-running, 1917-22 | O'Connor, Emmet | Article in Journal | | 2001 |
| Waving the green flag | Ryan, Des | Article in Journal | | 2009 |
| Wentworth and Dublin's Catholic clergy : a document from the Strafford Papers | O'Connor, Tim | Article in Journal | | 2005 |
| What Caused the 1913 Lockout? Industrial Relations in Ireland, 1907-13 | O'Connor, Emmet | Article in Journal | | 2005 |
| When crowbar & bayonet ruled : the Land War on the Belcarra estate of Harriet Gardiner & Susanna Pringle, 1879-1910 | O'Connor, James R.O'Connor, Michael M. | Monograph or Collective Volume | Original Writing | 2013 |
| Why did they fight for Britain? Irish recruits to the British forces, 1939-1945 | O'Connor, Steven | Article in Journal | | 2015 |
| Wicklow Masonic Lodge 748 | O'Connor, Jeremiah | Article in Journal | | 2016 |
| William Norton | Puirséil, Niamh | Article in Book | | 2016 |
| William Rowan Hamilton, 1805-1865 | O'Connor, KevinRobertson, Edmund F. | Article in Book | | 2003 |
| William Upton | Lane, Fintan | Article in Book | | 2016 |
| William Walker – A Connolly for Unionists? | O'Connor, Emmet | Article in Book | | 2017 |
| William Walker, Irish labour and 'Chinese slavery' in South Africa, 1904-6 | O'Connor, Emmet | Article in Journal | | 2010 |
| Wise men and little women: 6 January in Irish popular tradition | Ní Fhloinn, Bairbre | Article in Book | | 2019 |
| With Michael Collins in the fight for Irish independence | Clifford, BrendanO'Connor, Batt | Monograph or Collective Volume | Aubane Historical Society | 2004 |
| Wittgenstein's Irish cottage | Hayes, John | Article in Journal | | 2018 |
| Women and the rebellion, Wexford 1798 | O'Connor, Catherine | Article in Journal | | 2003 |
| Women in Irish folklore : the testimony regarding illegitimacy, abortion and infanticide | O'Connor, Anne | Article in Book | | 1991 |
| Women in the union 1 : Difficult and invisible : explaining working class women's lives | Clancy, Mary | Article in Book | | 2013 |
| Women in the union 2 : 'Fraternally yours' | O'Brien, Mags | Article in Book | | 2013 |
| Women in the union 3 | Moriarty, Theresa | Article in Book | | 2013 |
| Wood Quay | O'Connor, Consuelo | Article in Book | | 2005 |
| Would it have been like this? James Plunkett and 'Strumpet City' | Lysaght, D. R. O'Connor | Article in Journal | | 2004 |
| Yvonne O’Connor | Darcy, Una | Article in Journal | | 1996 |
| [Obituary] Sister de Pazzi O'Connor, 1912-2009 | Delany, Teresa | Article in Journal | | 2010 |
| ‘Bullworks against the furie of heresie’: Identity, Education, and Mission in the English Jesuit College of St Omers | Graffius, Jan | Article in Book | | 2018 |
| ‘The Party Hack, and Tool of the British Government’ : T.P. O'Connor, America and Irish Party resilience at the February 1918 South Armagh by-election | Doherty, Erica | Article in Journal | | 2015 |
| ‘What the hell do they want a republic for?’ Labour, the left and the Irish Civil War | O'Connor, Emmet | Article in Book | Cork University Press | 2024 |
| “Those lads would tackle anything” : Na Fianna Éireann and the publishing enterprise of youth in the early twentieth century | Hay, Marnie | Article in Journal | | 2021 |