| "We here in Ireland are not outside this struggle": the Irish Catholic Church, anti-communism and the Cold War, 1945-1965 | Madden, Gerard | Thesis | | 2018 |
| 'A situtation of great novelty and difficulty' : the Irish railway munitions strike of 1920 | McCabe, Conor | Thesis | | 2003 |
| 'God hath commanded': the established church and its community in Dublin, 1603-41 | Diamond, Ciaran | Thesis | | 1997 |
| 'Government by journalism' : Sligo and the newspaper industry, 1885-1927 | Wehrly, Mark | Thesis | | 2008 |
| 'Mr Bewley in Berlin': aspects of the career of an Irish diplomat | Roth, Andreas | Thesis | | 1998 |
| 'Soldier of Christ' : the political and ecclesiastical career of Nicholas French, Catholic bishop of Ferns (1603-1678) | McHugh, Jason | Thesis | | 2005 |
| 'That nost serious duty' : Catholic preaching in Ireland, 1760-1840 | Ryan, David Edward | Thesis | | 1998 |
| 'The academy of warre' : military affairs in Ireland, 1600 to 1800 | Bartlett, Thomas | Monograph or Collective Volume | National University of Ireland | 2002 |
| 'The commencement of a new era'? Rural district councils in Ireland, 1899-1925 | McDermott, Feichin T. | Thesis | | 2010 |
| 'The four-leaved shamrock' : electoral politics and the national imagination in independent Ireland | Fanning, Ronan | Monograph or Collective Volume | National University of Ireland | 1983 |
| 'The Kildare women' : family life, marriage and politics in the early modern period | O'Connor, Carol | Thesis | | 2008 |
| 'Time, energy and brass' : why 'Studies' did not fail | O'Keeffe, Declan | Article in Journal | | 2017 |
| A 17th-century 'real-estate company': the 1649 officers and the Irish land settlements, 1641-81 | McKenny, Kevin | Thesis | | 1989 |
| A Catholic unionist: the life and times of William Monsell, first Baron Emly of Tervoe, 1812-1894 | Potter, Matthew | Thesis | | 2001 |
| A century of scholarship : travelling students of the National University of Ireland | | Monograph or Collective Volume | National University of Ireland | 2008 |
| A comparative analysis of Ireland's applicants for membership of the European Economic Community, 1957-73 | Geary, Michael J. | Thesis | | 2004 |
| A comparative case study of the fourteen emigrants of the parish of Addergoole, County Mayo, who boarded the R.M.S. Titanic : migration, memory and reflection | Nolan, Alex | Thesis | | 2007 |
| A comparative study of local government in Tuam and Armagh 1840-1940 | O'Connor, Gabriel Charles | Thesis | | 2004 |
| A comparative study of the American Civil War sympathies of the Irish of Dublin, Belfast, New York and Boston | Burke, Paul Thomas | Thesis | | 2000 |
| A comparative study of the lives of Church of Ireland and Roman Catholic clergy in the south-eastern dioceses of Ireland from 1550 to 1650 | Hensey, Áine | Thesis | | 2012 |
| A guide to the archival holdings of the James Hardiman Library, National University of Ireland, Galway | Hoare, Kieran | Article in Journal | | 2001 |
| A Latin-Irish commentary on Psalm 68.10 | McLaughlin, Roisin | Article in Book | | 2019 |
| A learned assembly : Éigse (1939-) | Ó Catháin, Brian | Article in Book | | 2025 |
| A life of Patrick Cardinal O'Donnell | Gallagher, John P. | Thesis | | 1975 |
| A micro-study of Land Commission processes and procedures in Balrothery East, County Dublin, 1900-1939 | Mullan, Catherine | Thesis | | 2005 |
| A monastic landscape : the Cistercians in medieval Leinster | Lynch, Bridget | Thesis | | 2008 |
| A pan-Gaelic perspective of the oral lament | Nic Lochlainn, Sorcha | Article in Book | | 2019 |
| A praise-poem from eleventh-century Armagh | Herbert, Máire | Article in Book | | 2019 |
| A project to re-house the St Canice's Cathedral Library from Kilkenny to Maynooth University Library | McCormack, BarbaraMurphy, Hugh | Article in Journal | | 2019 |
| A re-examination of Holinshed's Irish Chronicle | Herbage, Patrick J. | Thesis | | 2009 |
| A society in transit : the Protestant community in Tyrone, 1836-42 | Curran, Darragh E. | Thesis | | 2010 |
| A strange parallel? Nationalism in Ireland, Hungary and Italy, 1780-1870 | Hussey, Brian Patrick | Thesis | | 2001 |
| A study of associational culture and the development of Irish nationalism, 1780-1830, with the construction of a software information environment | Webb, Sharon | Thesis | | 2012 |
| A study of the infrastructure and legislation for adoption in Ireland c.1911-1971 | Stewart, Colleen | Thesis | | 2014 |
| A study of the United Irish League in the King's County, 1899-1918 | McEvoy, John Noel | Thesis | | 1992 |
| A study of travel writing in early Victorian Ireland | McAuliffe, John Timothy | Thesis | | 1997 |
| A symbol for the nation: the national holiday campaign, 1901-3 | Mooney, Pauline A. | Thesis | | 1992 |
| A verse on succession to ecclesiastical office | Breatnach, Liam | Article in Book | | 2007 |
| Achieving equality : women and the foundation of the university | Pašeta, Senia | Article in Book | | 2008 |
| Aistí meadarachta in Irish grammatical tracts V. | Ó Riain, Gordon | Article in Book | | 2019 |
| America and the Land League, 1880-1882: Irish-American factionalism and fundraising | Browne, Liam Gerard | Thesis | | 1998 |
| American financing of Fenianism in Ireland, 1858-1867 | Quigley, Kevin James | Thesis | | 1983 |
| An almost unmixed republic : the Royal Dublin Society, 1815-45 | Bright, Kevin | Thesis | | 2002 |
| An assessment of the meteorological archives from N.U.I. Galway 1861-1966 | Hickey, Kieran R. | Article in Journal | | 2003 |
| An examination of the Auxiliary Division, Royal Irish Constabulary, exploring possible links between conduct and conflict-related injury, traumatic experiences and stress | Gardiner, Eamonn T. (Eamonn Thomas) | Thesis | | 2017 |
| An Ghaeilge agus an t-oideachas tríú leibhéal | Ó Máirtín, Mícheál | Article in Journal | | 1998 |
| An important stone carving collection from NUI Galway | Higgins, Jim | Article in Journal | | 2012 |
| 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-speaking district in the Kilkenny barony of Gowran | Ó Drisceoil, Proinsias | Article in Book | | 2019 |
| An t-ár agus an t-ocras: a Clare scribe’s response to the Great Famine. | Ní Úrdail, Meidhbhín | Article in Book | | 2019 |
| Anders Ahlqvist remembered | O'Neill, Pamela | Article in Journal | | 2018 |
| Apalóg ón bhFiannaíocht | Ó Háinle, Cathal | Article in Book | | 2019 |
| Appendix I. NUI, 49 Merrion Square | Halpin, Attracta | Article in Book | | 2008 |
| Archbishop Leahy of Cashel (1806-75) | O'Dwyer, Christopher, Rev. | Thesis | | 1971 |
| Aspail as son na Gaeilge: timirí Chonradh na Gaeilge, 1893-1923 | Ó Cearúil, Colm | Thesis | | 1995 |
| Aspects of childhood : Ireland, 1800-1925 | Rutherford, Vanessa | Thesis | | 2002 |
| Aspects of the Fenian movement in Kilkenny, 1858-70 | Brennan, Patrick Anthony | Thesis | | 1979 |
| Association football and Irish society during the inter-war period, 1918-1939 | Tynan, Mark | Thesis | | 2014 |
| Bede's plures de Scottorum regione: The Irish in the Historia Ecclesiastica Gentis Anglorum | McCann, Sarah | Thesis | | 2013 |
| Begging and alms-giving in urban Ireland, 1815-1850 | McCabe, Ciarán | Thesis | | 2014 |
| Bishop Thomas Lewis O'Beirne and his church-building programme in the diocese of Meath, 1798-1823 | Gallagher, Mary C. | Thesis | | 2009 |
| Boats, bibles and boyans: Gaelic language and lore in Easter Ross | Watson, Seosamh | Article in Book | | 2019 |
| Brendan Corish : a life in politics, 1945-77 | Ní Chonchubhair, Sinéad | Thesis | | 2009 |
| Brightening the countryside: the library service in rural Ireland, 1902-35 | Devlin, Felicity | Thesis | | 1990 |
| Calendar of the papers of the Irish College, Paris, 1316-1800 | Swords, Liam | Thesis | | 1979 |
| Calico to whiskey: a case study on the development of the distilling industry in the Naas revenue collecting district, 1700-1921 | Given, Patrick | Thesis | | 2011 |
| Captain Myles Walter Keogh, United States army 1840-1876 | Hayes-McCoy, G. A. (Gerard Anthony) | Monograph or Collective Volume | National University of Ireland | 1966 |
| Castlecomer : the Wandesforde state and local society, 1830-1970 | Downey, Mary Margaret | Thesis | | 2006 |
| Catechists in exile: an examination of seventeenth-century catechisms written on the continent for the use of Irish missions | O'Reilly, Mary | Thesis | | 1994 |
| Catholic priests and political violence in Ireland, 1919-21 | Heffernan, Brian J. | Thesis | | 2011 |
| Changing Catholic culture in Ireland, 1950-1979 | Fuller, Louise | Thesis | | 1997 |
| Charles Gavan Duffy and the Repeal movement | Nowlan, Kevin B. | Monograph or Collective Volume | National University of Ireland | 1963 |
| Charles J. Kickham, 1828-1882 | Comerford, Richard Vincent | Thesis | | 1972 |
| Chemistry | Butler, R. N. | Article in Book | | 1999 |
| Childbirth and midwifery in nineteenth-century Dublin, 1850-1900 | Bergin, Julia Ann | Thesis | | 2009 |
| Church and society in early sixteenth-century Kildare | Lyons, Mary Ann | Thesis | | 1991 |
| Churches, people and pastors : the Church of Ireland in Victorian Dublin, 1833-1901 | Crawford, John W. R. | Thesis | | 2003 |
| Cistercians and Cistercian abbeys in sixteenth- and seventeenth-century Ireland | Hogan, Flannan, Rev. | Thesis | | 1972 |
| Civic politics and parliamentary representation in Waterford City, 1730-1807 | Kirby, Brian T. | Thesis | | 2002 |
| Civic priveledge, state policy and the growth of recusancy: the patriciate of Dublin in the age of reformation, 1548-1613 | Lennon, Colm | Thesis | | 1987 |
| Clare's married women primary teachers, 1922-58: a marriage bof convenience? | Kierce, Mary | Thesis | | 2000 |
| Classics in Victorian Galway | Keaveney, Arthur | Article in Book | | 1999 |
| Clonmel corporation, 1842-90: a municipal study | O'Donnell, Seán | Thesis | | 1996 |
| Colonel Dan Bryan and the evolution of Irish military intelligence, 1919-1945 | Biddlecombe, Darragh | Thesis | | 1999 |
| Coming to terms with the 1997 act : the National University of Ireland Senate, 1997-2007 | Dunne, Tom, 1939- | Article in Book | | 2008 |
| Commercial and industrial life in Cork city from the act of union to 1826 | O'Keefe, Sheila (Sr Camillus) | Thesis | | 1975 |
| Communities of science : the Queen's Colleges and scientific culture in provincial Ireland, 1845-1875 | Adelman, Juliana | Thesis | | 2006 |
| Contending neighbours : society in Fingal, 1603-60 | Ní Mhurchadha, Maighréad M. B. | Thesis | | 2002 |
| Court ideology in mid eighteenth-century Ireland: an examination of political culture | McCoy, John Gerard | Thesis | | 1990 |
| Craft and culture: the design, production and consumption of silver in Ireland in the seventeenth century | Cunningham, Jessica | Thesis | | 2016 |
| Criminal children in post-Famine Connacht: Poverty, crime and punishment, with a particular focus on the period 1854-1870 | Curtin, Geraldine | Thesis | | 2012 |
| Dán le Tadhg Dall Ó hUiginn | Ó Macháin, Pádraig | Article in Book | | 2019 |
| Dan Réitigh le Conchobar Ruadh Mac Con Midhe | O'Riain, Gordon | Article in Book | | 2007 |
| Dance in pre-Norman Ireland | Kelly, Fergus | Article in Book | | 2019 |
| Daniel O'Conor Sligo : his family and his times | Petrie, Charles, Sir | Monograph or Collective Volume | National University of Ireland | 1959 |
| Democracy and its nineteenth century Irish critics | McCartney, Donal | Monograph or Collective Volume | National University of Ireland | 1979 |
| Denis Kilbride, M.P. (1848-1924) | Redmond, Paul | Thesis | | 2003 |
| Disabled and disfigured veterans of the First World War | Farrell, Anthony | Thesis | | 2016 |
| Douglas Hyde and the GAA | Moore, Cormac | Article in Book | | 2016 |
| Douglas Hyde, first President of Ireland : background and early development of the office of Head of State | Manning, Maurice | Article in Book | | 2016 |
| Douglas Hyde: the professor who became President of Ireland | | Monograph or Collective Volume | National University of Ireland | 2016 |
| Dublin Freemasons, 1770-1830 | Horan, Philip | Thesis | | 2008 |
| Dubthach’s laíd in Táin bó Cúailnge | Ó Cathasaigh, Tomás | Article in Book | | 2019 |
| Dundalk, 1900-1960: an oral history | Flynn, Charles | Thesis | | 2000 |
| Eamon de Valera, 1921-75 | Walsh, John | Article in Book | | 2008 |
| Electoral politics in Ireland during the Famine 1845-9 | Fennelly, Ciaran | Thesis | | 2004 |
| Engineering | Duffy, Paul | Article in Book | | 1999 |
| English action, Irish reaction: the MacMurrough Kavanaghs, government policy and changes in landownership, 1530s-1630s | Moore, Donal Martin | Thesis | | 1985 |
| English merchants and economic promise in Virginia, Bermuda and the West Indies, 1607-1650 | Connolly, Catherine Mary | Thesis | | 2009 |
| English, history, and philosophy | Bateman, FionaFoley, Timothy P. (Tadhg) | Article in Book | | 1999 |
| Establishing mission networks in the early modern catholic church: ireland, rome and the west indies, 1600-1669 | Binasco, Matteo | Thesis | | 2013 |
| Estate management practices on the Wentworth-Fitzwilliam core estates of Ireland and Yorkshire: a comparative study, 1815-65 | Byrne, Fidelma M. | Thesis | | 2017 |
| Eucharistic belief and practice in Ireland, 1660-1740 | Monaghan, Evie | Thesis | | 2014 |
| Evangelicalism, the Church of Ireland and the anti-Catholicism in the life and thought of Rev. Tresham Dames Gregg (1800-81) | Connell, Paul. M. | Thesis | | 2007 |
| Evictions on the Glinsk Creggs estate of Allan and Margaret Pollok in the 1850s | Scott, Pauline | Thesis | | 2015 |
| Farm habitants in Annaghdown, County Galway : management practices in the 1940s | Aughney, T. C.Gormally, M. J. | Monograph or Collective Volume | Environmental Science Unit, National University of Ireland | 1999 |
| Father Finaghty, Valintine Greatrakes and attitudes to the miraculous in seventeenth-century Ireland and England | Parker, Ciarán Thomas | Thesis | | 1997 |
| Fear Feasa Ó'n Cháinte's petition for reconciliation | Griffin-Wilson, Margo | Article in Book | | 2019 |
| Foinsí an Leagain De bheatha Cholaim Chille a scríobhadh faoi stiúradh Mhaghnuis Uí Dhomhnaill | Breatnach, Caoimhín | Article in Book | | 2007 |
| Foras feasa ar Éirinn : establishing a literary canon | Ní Úrdail, Meidhbhín | Article in Book | | 2007 |
| Fr Denis Fahy, C.S.Sp., and Maria Duce, 1945-1954 | Delaney, Enda Gerard | Thesis | | 1993 |
| France and the Free State: Franko-Irish diplomacy, 1922-1931 | O'Connor, Priscilla Brigid | Thesis | | 1991 |
| Franciscan copies of Lucerna fidelium. Lóchrann na gcreidmheach in Ireland. | Sharpe, Richard | Article in Book | | 2019 |
| Franko-Irish relations in the sixteenth century | Lyons, Mary Ann | Thesis | | 1997 |
| From Carnacon to Cape Town: An interpretive study of the transnational career of Senator Colonel Maurice Moore (1854-1939), soldier, diplomat and politician | O'Neill, Madeline | Thesis | | 2018 |
| From Connemara to Minnesota: The Nugent Emigration Scheme, 1880 | Keoghan, Maxine Elida | Thesis | | 2016 |
| From Gaelic lordships to English counties: the Tudor transition in Leix and Offaly, c.1547-1603 | Wheeler, Diarmuid | Thesis | | 2018 |
| From Irish Whig rebel to Bourbon diplomat : the life and career of Nathanial Hooke (1664-1738) | Byrne, Thomas | Thesis | | 2006 |
| From landlord to rentier: The Wyndham Land Act of 1903 and its economic consequences for Irish landlords, 1903-1933 | McCarthy, Tony | Thesis | | 2017 |
| From political economy to economics and commerce | Boylan, Thomas A.Foley, Timothy P. (Tadhg) | Article in Book | | 1999 |
| From royal university to national university, 1879-1908 | Coolahan, John | Article in Book | | 2008 |
| Fuaras fríth is misde mhé: aisling ghrá | Ní Mhurchú, Síle | Article in Book | | 2019 |
| 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 |
| Galway townsmen as the owners of land in Connacht, 1585-1641 | Ó Bric, Breandán | Monograph or Collective Volume | | 1974 |
| Garret FitzGerald, 1997- | Manning, Maurice | Article in Book | | 2008 |
| Gender, age and visibility : the archaeology of women and children in Ireland, 700-1200 AD | McAlister, Deirdre K. | Thesis | | 2008 |
| Gender, crime and punishment in late nineteenth-century Ireland: Mayo and Galway examined | Jackson, Sinéad Mary | Thesis | | 1999 |
| Gné na faisnéise rúnda de Chogadh na Saoirse in Éirinn, 1919-21 | Ó Comhraí, Cormac | Thesis | | 2002 |
| Government challenge and protection of property : the impact of the reformation on St Anne's fraternity, Dublin | Geoghegan, Richard | Thesis | | 2006 |
| Grain mills of County Longford c.1750 - c.1950s : a regional survey | Mimnagh, James P. | Thesis | | 2010 |
| Healyism and the Irish parliamentary party, 1895-1900 | McDonnell, James | Thesis | | 1989 |
| Ideology and social control: the early social history of cinema in Ireland | Farrelly, Michael James | Thesis | | 1999 |
| Illicit distilling and townland fining legislation in Donegal, 1810-1820 | Rehill, Ramona | Thesis | | 2008 |
| Images and perceptions of Hungary and Austria-Hungary in Ireland, 1815-1875 | Zarka, Zsuzsanna | Thesis | | 2012 |
| Imperial disengagement and partition: Ireland as precedent for India | Hanlon, Dean R.P. | Thesis | | 2002 |
| In search of Hyde : how did a retired academic become the first President of Ireland | Murphy, Brian | Article in Book | | 2016 |
| Institutional reform in mental healthcare in Ireland: the establishment of the Ardee Mental Hospital, 1933, in its historical context | Butterly, Lisa | Thesis | | 2014 |
| International News Supply in Ireland, c.1899-1949 | O'Donnell, James T. | Thesis | | 2014 |
| Ireland 1865-1921 | Dillon, Thomas | Article in Journal | | 1966 |
| Ireland and Spain, 1939-55: Cultural, economic and political relations from neutrality in the Second World War to joint membership of the United Nations | Whelan, Barry | Thesis | | 2012 |
| Ireland and the South African War, 1899-1902 | Diver, Luke | Thesis | | 2014 |
| Ireland's response to the emergence of the apartheid system in South Africa, 1948-66 | Ryan, Bébhinn | Thesis | | 1999 |
| Irish : a difficult birth | Ó Madagáin, Breandán | Article in Book | | 1999 |
| Irish Catholics promoting their mission to convert the pagan world, 1900-1960 | Finnegan, Michael | Thesis | | 2001 |
| Irish clerics in the university of Paris, 1570-1770 | O'Connor, Priscilla | Thesis | | 2006 |
| Irish evangelicalism, Trinity College, Dublin, and the mission of the Church of Ireland at the end of the eighteenth century | Liechty, Joseph | Thesis | | 1987 |
| Irish families : the archival aspect | Edwards, R. W. D. (Robert Walter Dudley) | Monograph or Collective Volume | National University of Ireland | 1974 |
| Irish immigrants in the Rural U.S. Slave South | Regan, Joe | Thesis | | 2015 |
| Irish perceptions of national identity in Austria-Hungary and its small successor states, 1914-1945 | Zách, Lili | Thesis | | 2015 |
| Irish population before Petty : problems and possibilities | Mac Niocaill, Gearóid | Monograph or Collective Volume | National University of Ireland | 1981 |
| Irish republicanism in Great Britain, 1917-21 | Gannon, Darragh Joseph | Thesis | | 2012 |
| Irish responses to the Jewish refugee crisis: policy and public opinion | Goldstone, Katrina | Thesis | | 1995 |
| Irish return migration from America at the turn of the nineteenth century, 1890-1920 | Dunnigan, Diane Rose | Thesis | | 2012 |
| Irish soldiers in Risorgimento Italy and Civil War America: Nineteenth-century Irish nation-building in transnational and comparative perspective | O'Driscoll, Florry | Thesis | | 2018 |
| Irish-Soviet diplomatic and friendship relations, 1919-80 | Quinn, Michael Joseph | Thesis | | 2014 |
| Irishmen in the British Service during the French Revolutionary Wars, 1793-1802 | McDonnell, Ciaran | Thesis | | 2014 |
| Is tórmach ceatha: Dáibhí Ó Bruadair a chum, 1693. | Ó Murchú, Liam P. | Article in Book | | 2019 |
| Islands in a global context:
Proceedings of the Seventh International Conference on Insular Art | | Monograph or Collective Volume | Four Courts Press | 2017 |
| James Hardiman Library : highlights from our special collections | Boran, MarieLardner, Olivia | Monograph or Collective Volume | Galway, National University of Ireland | 2016 |
| James Larkin and the British, American and Irish Free State Intelligence Services: 1914-1924 | Watts, Gerard | Thesis | | 2016 |
| Joe O'Halloran : citation for admission to degree of master of arts 'honoris causa', National University of Ireland, Galway, 24th October 2001 | Foley, Timothy P. (Tadhg) | Article in Journal | | 2002 |
| John Mitchel, 1815-1875: an interpretative study | Miller, Peter Gerard | Thesis | | 1996 |
| John O'Mahony : revolutionary and scholar (1815-1877) | Sayers, Brian | Thesis | | 2005 |
| Joining the Movement: tradition and ideology in the IRA, 1948-1962 | Browne, David | Thesis | | 2014 |
| Kildare County Council, 1899-1926 | Nelson, Thomas | Thesis | | 2007 |
| Kinship, religion, culture and order: the native Irish and the Old English in early seventeenth-century Ireland | Murtagh, Eleanor Therese | Thesis | | 2012 |
| Laity and clergy in the Catholic renewal of Dublin, c.1750-1830 | Begadon, Cormac | Thesis | | 2009 |
| Land agents and estate management in King's County during the Great Famine, 1838-53 | Reilly, Ciarán J. | Thesis | | 2010 |
| Land and people in Wicklow, 1660-1840 | Gurrin, Brian | Thesis | | 2006 |
| Land and popular politics in County Kerry, 1872-86 | Lucey, Donncha Seán | Thesis | | 2007 |
| Land and settlement in the Ormond baronies of Tipperary, 1620-1703 | Boland, Matthew | Thesis | | 1992 |
| Land and survival in Fingal, 1630-1703 | Byrne, Desmond J. | Thesis | | 2009 |
| Land purchase policy in Ireland, 1917-23: from the Irish Convention to the 1923 land act | Sheenan, Joseph Thomas | Thesis | | 1993 |
| Land settlements in County Wexford, 1640-1710 | Goff, Henry Anthony | Thesis | | 1990 |
| Land surveying in eighteenth and early nineteenth-century Dublin | O’Cionnaith, Finnian | Thesis | | 2011 |
| Land, conflict and society in County Kilkenny, 1850-82 | Walsh, Walter | Thesis | | 2007 |
| Land, law and society in sixteenth-century Ireland | Nicholls, K. W. (Kenneth W.) | Monograph or Collective Volume | National University of Ireland | 1976 |
| Land, politics and religion on the Clancarty estate, east Galway, 1851-1914 | Casey, Brian J. | Thesis | | 2011 |
| Law | O'Malley, Liam | Article in Book | | 1999 |
| Leabhair na mBairéadach : Léas ar an Athbheochain | Ó Tuathaigh, M. A. G. (Gearóid) | Article in Journal | | 2017 |
| Leaganacha De Cath Ruis na Ríg : an deilbhíocht idir 1100-1650 | Mac Gearailt, Uáitear | Article in Book | | 2007 |
| Léann lamhscríbhinní Lobháin = the Louvain manuscript heritage | | Monograph or Collective Volume | National University of Ireland | 2007 |
| Leopold von Ranke and Ireland | Boldt, Andreas | Thesis | | 2004 |
| Lia Fáil in context | Ó Coileáin, Seán | Article in Book | | 2016 |
| Lia Fáil ina aimsir féin | Ó Coileáin, Seán | Article in Book | | 2016 |
| Local experiences of the 1798 Rebellion: a comparative context | Priestley, Ciaran | Thesis | | 2014 |
| Local government and the management of urban space : a comparative study of Belfast and Dublin | Cullen, Francis J. | Thesis | | 2005 |
| Loch nEchach n-án: Nasalierungsübertragung in den altirischen Glossen und späteren Quellen. | Uhlich, Jürgen | Article in Book | | 2019 |
| Logainmneacha na mbailte fearainn i mbarúntachtaí Dhéise Uachtarach agus Dhéise Íochtarach Contae na Mí; bunfhorimeacha agus bríonna | O’Donoghue, Patrick | Thesis | | 2012 |
| Lords of land and labour: a comparison of Antebellum Mississippi's John A. Quitman and Nineteenth-Century Ireland's Lord Clonbrock | Smith, Cathal | Thesis | | 2015 |
| Lorg na leabhar: a Festschrift for Pádraig A. Breatnach | | Monograph or Collective Volume | The National University of Ireland | 2019 |
| Maigh Eo na Sacsan: the early medieval history of Anglo-Saxon community in Ireland, c. A.D. 664 - c. A.D. 800 | Orschel, Vera | Thesis | | 2000 |
| Mary Hayden and women's admission to the university - the establishment of the National University of Ireland in 1908 | Padbury, Joyce | Article in Journal | | 2008 |
| Mathematics | Tobin, Seán | Article in Book | | 1999 |
| Maurice Manning | McCartney, Donal | Article in Journal | | 2009 |
| Medicine | Murray, James P. | Article in Book | | 1999 |
| Melville, Hart, and Anderson : early teachers of natural history, 1849-1914 | Collins, Timothy | Article in Book | | 1999 |
| Microfinance institutions in nineteenth-century Ireland | McLaughlin, Eoin | Thesis | | 2010 |
| Military aviation in Ireland, 1921-45 | O'Malley, Michael | Thesis | | 2007 |
| Mo thurus go hAmerice: tionchar na féinchinsireachta | Nic an Bhaird, Máire | Article in Book | | 2016 |
| Modernisation and the peasant: Meath, 1790-1844 | Mooney, Matthew Desmond | Thesis | | 1986 |
| Muscular Christianity, amateurism, and the British imperial sports ethos in late 19th-century and early 20th-century Ireland | Dann, Jeffrey | Thesis | | 2008 |
| M’airiuclán hi Túaim Inbir: speaker and setting | Ní Dhonnchadha, Máirín | Article in Book | | 2019 |
| Napper Tandy and the European crises of 1798-1803 | Ní Chinnéide, Síle | Monograph or Collective Volume | National University of Ireland | 1962 |
| National identity construction and the popular ballad in nineteenth-century Ireland | Barter, Derek | Thesis | | 2008 |
| National University of Ireland : summary of progress for the seven years 1932-1939 | Anonymous | Monograph or Collective Volume | Three Candles | 1939 |
| National University of Ireland, Galway | Mac Mathúna, Séamus | Article in Book | | 2008 |
| National University of Ireland, Maynooth | Smyth, Séamus | Article in Book | | 2008 |
| Natural philosophy / physics | O'Connor, Tom | Article in Book | | 1999 |
| Nineteenth-century Irish emigration to and settlement in Argentina | McKenna, Patrick Joseph | Thesis | | 1994 |
| No hero in the house : Diarmait Mac Murchada and the coming of the Normans to Ireland | Martin, F. X. (Francis Xavier), 1922-2000 | Monograph or Collective Volume | National University of Ireland | 1977 |
| Nobody's business: aspects of County Roscommon politics, 1925-1931 | Foley, Mark | Thesis | | 1999 |
| Notes on the transmission of Mesca Ulad. | Mac Gearailt, Uáitéar | Article in Book | | 2019 |
| Nurses and midwives in the state sector in Galway, 1922-1970 | Hawkins, Mary | Thesis | | 2014 |
| Nurturing Utopia: Jeffersonian expansionism in contexts, 1760-1810 | Contini, Renaud | Thesis | | 2012 |
| Obituary. Christopher Townley/Críostóir Túinléigh | Mac Mathúna, Séamus | Article in Journal | | 2006 |
| On 'His Magisties Order' : social relations in West Offaly, the barony of Garrycastle, 1801-1851 | Murphy, Gerard | Thesis | | 2009 |
| Opposition in the Irish parliament, 1759-71 | Cummins, Séamus Anthony | Thesis | | 1978 |
| Patterns of social change in a provincial capital : Galway, c.1800-1914 | Cunningham, John Francis, 1957- | Thesis | | 2002 |
| Perceptions of St Patrick in eighteenth-century Ireland | McCormack, Bridget | Thesis | | 1997 |
| Píosaí gloine dhaite | Hijmans, Alex | Article in Book | Leabhair Comhar | 2011 |
| Polish views of Seán Lester as high commissioner of the League of Nations in Danzig, 1934-1937 | McNamara, Paul Martin | Thesis | | 2007 |
| Political and military aspects of the Irish Army’s service with United Nations forces in the Congo, 1960-64 | McCafferty, James | Thesis | | 2014 |
| Political change, society and the impact of the Great War in County Clare: a regional study of change and revolution in Ireland | McCarthy, Daniel | Thesis | | 2001 |
| Political change, society and the impact of the Great War in County Clare: a regional study of change and revolution in Ireland | McCarthy, Daniel J. | Thesis | | 2000 |
| Political strategy in the service of religious and cultural modernisation : the public career of Florence Conry, c.1560-1629 | Hazard, Benjamin | Thesis | | 2008 |
| Politics and rebellion in County Kildare, 1790-1803 | Chambers, Liam | Thesis | | 1996 |
| Popular Irish literature in the age of the Anglo-Irish revival: four historical case studies | Candy, Catherine Monica | Thesis | | 1987 |
| Popular religion in Gaelic Ireland, 1445-1645 | Ryan, Salvador | Thesis | | 2002 |
| Power, resistance, and ritual: paternalism on the Clonbrock Estates, 1826-1908 | McKenna, Kevin | Thesis | | 2011 |
| Presbyterian radicalism, landlord influence and electoral politics in Co. Down in the mid-nineteenth century | Stewart, Stephen Michael | Thesis | | 1981 |
| Press coverage of the 1981 H-Block hunger strike: an analysis | Flanagan, Evelyn | Thesis | | 2002 |
| Principles and pragmatism : the early life and career of Daniel O'Neill at the court of Charles I, 1610?-1650 | Larkin, Carmel | Thesis | | 2002 |
| Professor T. A. Smiddy (1875-1962) | Gaffey, Paul | Thesis | | 2007 |
| Promoting 'English Civility' in Tudor Ireland: ideology and the rhetoric of difference | Lessing, Carla Ellen | Thesis | | 2016 |
| Promoting Irish on his Americal tour, 1905-06 : 54 cities and Hyde's two visits to President Theodore Roosevelt in the White House | Mac Mathúna, Liam | Article in Book | | 2016 |
| Protestant politics and society in Co. Monaghan, 1911-26 | Dooley, Terence Anthony Martin | Thesis | | 1986 |
| Protestants and Irishness in independent Ireland : an exploration | Crawford, Heather | Thesis | | 2008 |
| 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 |
| Rationing in Emergency Ireland, 1939-1948 | Bryan, Ciaran | Thesis | | 2014 |
| Reconstructing an Ascendancy world: the material culture of Frederick Hervey, the Earl Bishop of Derry (1730-1803) | Campion, Rebecca Margaret Ricardo | Thesis | | 2012 |
| Reform and rehabilitation: the origins of corrective incarceration in Ireland, 1763-1870 | Carroll, Patrick Edward | Thesis | | 1991 |
| Reform opposition in the 1830s as viewed through the illustrated press of Ireland and Britain | Kavanagh, Robin J. | Thesis | | 2006 |
| Reform, instruction, and practice: the impact of the Catholic Revival on the laity in the Dublin diocese, 1793-1853 | O'Driscoll, Katherine | Thesis | | 2016 |
| Rehousing the Irish poor in Irish country towns, 1880-1947: a case study of Sligo | Gallagher, Fíona | Thesis | | 2016 |
| Religion and reform in the Tudor diocese of Meath | Scott, Brendan | Thesis | | 2005 |
| Repertoria manuscriptorum Collegii S. Antonii | Breatnach, Pádraig A. | Article in Book | | 2007 |
| Rev. Canon James Owen Hannay, M.A., D.Litt. ('George A. Birmingham'): an Irishman looks at his world | Reilly, Eileen | Thesis | | 1992 |
| Richard Baptist O'Brien, dean of Limerick (1809-1885) | Manley, Edward Joseph | Thesis | | 1991 |
| Richard Ledrede, bishop of Ossory, 1317-60: a study in change and conflict | Brennan, James | Thesis | | 2001 |
| Romanticism and Irish antiquarian societies, 1840-80 | Murray, Damien John | Thesis | | 1997 |
| Romanticism, nationalism and Irish antiquarian societies, 1840-80 | Murray, Damien | Monograph or Collective Volume | Department of Old and Middle Irish, National University of Ireland, Maynooth | 2000 |
| Ross Island : mining metal and society in early Ireland | O'Brien, William | Monograph or Collective Volume | National University of Ireland | 2004 |
| Sacred ground : megalithic tombs in coastal south-west Ireland | O'Brien, William | Monograph or Collective Volume | National University of Ireland | 1999 |
| Sacred languages and Irish glossaries : evidence for the study of Latin, Greek and Hebrew in medieval Ireland | Moran, Patrick | Thesis | | 2007 |
| Scéal an Tí Dhóite | Ua Súilleabháin, Seán | Article in Book | | 2019 |
| Scottish-Protestant Ulster and the crisis of the three kingdoms, 1637-1652 | Forkan, Kevin | Thesis | | 2003 |
| Settlement and Social Change in the Barony of Tulla, c. 1650-1845 | Shoosmith, Teresa | Thesis | | 2015 |
| Sexual crime and the formulation of the Criminal Law Amendment Act 1935 : a quantitative, historical and legislative analysis | Doyle, David Matthew | Thesis | | 2010 |
| Sir Richard Griffith's three valuations of Ireland, 1826-1864 | Smyth, William A. | Thesis | | 2008 |
| Sisters of St John of God in Australia, 1895-1965 | Brennan, Mary M. | Thesis | | 2003 |
| Sisters of St John of God, 1871-1900 | Brennan, Mary Eugenia | Thesis | | 1999 |
| Small treasures: The production, retail and consumption of jewellery in Dublin, c.1770-c.1870 | Scott, Breda | Thesis | | 2016 |
| Social security in independent Ireland, 1922-52 | Kelly, Adrian | Thesis | | 1995 |
| Societal change in Achill Island in the nineteenth century | Ní Ghiobhúin, Mealla C. | Thesis | | 2005 |
| Somhairle Mac Domhnaill agus Duanaire Finn | Ó hUiginn, Ruairí | Article in Book | | 2007 |
| St Abbán’s charm | Ó Néill, Pádraig P. | Article in Book | | 2019 |
| Starting Ireland on the road to industry : Henry Ford in Cork | Grimes, Thomas | Thesis | | 2008 |
| State promotion of turism in independent Ireland, 1925-1955 | Furlong, Irene | Thesis | | 2002 |
| State, nation and music in independent Ireland, 1922-51 | Mullaney-Dignam, Karol | Thesis | | 2008 |
| Steam engines make a comeback | O'Connor, Tom | Article in Journal | | 2012 |
| Strafford's Irish army, 1640-41 | Forkan, Kevin Brendan | Thesis | | 1999 |
| Suicide in Ireland, 1831-1921 : a social and cultural study | Laragy, Georgina | Thesis | | 2004 |
| Sylvester O’Halloran’s General History (1778): Irish Historiography and the Late Eighteenth-Century British Empire | Lyons, Claire E. | Thesis | | 2011 |
| T. K. Whitaker, 1976-96 | Fanning, Ronan | Article in Book | | 2008 |
| Tales of expansionary fiscal contractions in two European countries : hindsight and foresight | Considine, John,Duffy, David, 1976- | Monograph or Collective Volume | Department of Economics, National University of Ireland, Galway | 2007 |
| Telecommunications in the nineteenth century with particular reference to Ireland | Kirwan, Adrian | Thesis | | 2016 |
| The agricultural labourer and the state in independent Ireland, 1922-76 | Curtis, Catriona | Thesis | | 2007 |
| The archaeology and history of medieval Trim, County Meath | Potterton, Michael | Thesis | | 2002 |
| The archives held in the National University of Ireland | Moynihan, Nóirín | Article in Book | | 2008 |
| The attempts to revive the Irish language through the education system from 1922 to the 1960s | Kelly, Adrian | Thesis | | 1992 |
| The barony of Fore, County Westmeath, 1170-1540 | Masterson, Rory | Thesis | | 1996 |
| The Book of Leinster and the Book of the O’Byrnes | Buttimer, Neil | Article in Book | | 2019 |
| The British army in Ireland, 1910-1916: a social, political and military study | O'Meara, Brian Patrick | Thesis | | 2000 |
| The British army on the Curragh of Kildare, 1855-1922: environmental, social and economic aspects of the making and occupation of the camp | Costello, Cornelius | Thesis | | 1994 |
| The Butler revolt of 1569 | Curtiss, John Jeremiah | Thesis | | 1983 |
| The Catholic laity in Dublin, 1920-1940 | Hartigan, Maurice | Thesis | | 1992 |
| The Catholic middle classes in pre-Famine Cork | O'Brien, John B. | Monograph or Collective Volume | National University of Ireland | 1980 |
| The Catholic synods: their influences and their influence, 1600-90 | Forrestal, Alison | Thesis | | 1996 |
| The changing pattern of land ownership in the barony of Scarawalsh, Co. Wexford, 1540-1640 | Goff, Henry Anthony | Thesis | | 1980 |
| The Church of Ireland parishes of Leixlip and Lucan in the nineteenth century | Donohoe, Jane Patricia | Thesis | | 2003 |
| The concerns of local politics: a study of Galway, 1918-1928 | Keane, Daniel Francis | Thesis | | 1998 |
| The courts of petty sessions and the law in pre-Famine Galway | McMahon, Richard Jeremiah | Thesis | | 1999 |
| The Darwin debate in Dublin, 1859-1908 | Kelly, Aodhán | Thesis | | 2009 |
| The decline of the big house in Ireland, 1879-1950 | Dooley, Terence A.M. | Thesis | | 1996 |
| The development and consolidation of the Gaeltacht colony Rath Cairn, County Meath, 1935-48 | Pegley, Suzanne | Thesis | | 2007 |
| The development of medicine in early modern Dublin, 1650-1800 | Hansell, Penelope | Thesis | | 2006 |
| The development of public policy for the Irish tourist industry, 1922-55 | Walsh, Justin Martin | Thesis | | 1998 |
| The diocese of Meath during the episcopacy of John Cantwell, 1830-1866 | Connell, Paul | Thesis | | 2002 |
| The disfranchisement of the boroughs of Cashel and Sligo | Fogarty, Catherine | Thesis | | 2000 |
| The Doegen Records web project / Tionscadal Gréasáin Cheirníní Doegen | | Website | Royal Irish Academy | 2011 |
| The Dublin Medical Press and medical authority in Ireland, 1852-1866 | Daly, Ann | Thesis | | 2008 |
| The Dublin patriciate and the reception of migrants in the seventeenth century : civic politics and newcomers | Whelan, Edwards | Thesis | | 2008 |
| The duke of Ormond, the Popish Plot and the Exclusion Crisis, 1677-82 | Doyle, Thomas J. | Thesis | | 2004 |
| The Egmont estate, 1815-1846, with particular reference to the Great Irish Famine | Hennessy, Caroline Mary | Thesis | | 1997 |
| The experiences of the aristocracy in County Westmeath during the period 1879 to 1923 | Dunne, Eugene | Thesis | | 2016 |
| The extension of the Tudor rule in the O'Byrne and O'Toole lorddhip, 1495-1580 | Maginn, Christopher | Thesis | | 2003 |
| The Fenian amnesty movement, 1868-79 | Johnson, Maurice | Thesis | | 1980 |
| The formation of the Old English élite in Ireland | Canny, Nicholas P. | Monograph or Collective Volume | National University of Ireland | 1975 |
| The founding of a university | Murray, Charles | Article in Journal | | 1958 |
| The Franciscans in Ireland, 1400-1534 | Clabby, Thomas Niall | Thesis | | 1998 |
| The Gaelic mind and the collapse of the Gaelic world | O Riordan, Michelle | Monograph or Collective Volume | Cork University Press | 1991 |
| The Garda Síochána: a social and administrative history, 1922-52 | McNiffe, Liam | Thesis | | 1994 |
| The geography of the nineteenth-century Irish grazier system: a case study of Co. Roscommon | Leyden, Joseph | Thesis | | 1989 |
| The glosses of the psalter of St. Caimín : a preliminary investigation of their sources and function | O'Néill, Pádraig P. | Article in Book | | 2007 |
| The government’s execution policy during the Irish Civil War, 1922-23 | Murphy, Breen | Thesis | | 2011 |
| The hagiographical miscellany in Franciscan manuscript A.3 | Herbert, Máire | Article in Book | | 2007 |
| The history of Clare Castle and its environs : settlement and society | Power, Joseph | Thesis | | 2002 |
| The history of the Irish Presentation Sisters in the twentieth century : from autonomy to union | O'Reilly, Louise | Thesis | | 2009 |
| The horse in nineteenth-century Ireland : a socio-economic study | Lane, Stuart Nassau | Thesis | | 2005 |
| The Hylands of Clonmoran: an enterprising Catholic family in County Kilkenny, 1816-1917 | Hyland, Richard | Thesis | | 2014 |
| The I.R.B. in Connacht and Leinster, 1858-1878 | Griffin, Brian John Peter | Thesis | | 1983 |
| The iconography of exile : Fearghal Óg Mac An Bhaird in Louvain | Ó'Macháin, Pádraig | Article in Book | | 2007 |
| The impact of the American Civil War on the emergence of Irish-American nationalism | Manzor, Paul James | Thesis | | 2001 |
| The impact of the partition crisis on Cavan and Monaghan, 1914-1926 | Donohue, John Anthony | Thesis | | 1999 |
| The impact of the [American] Civil War on the emergence of Irish-American nationalism | Manzor, Paul James | Thesis | | 2000 |
| The influence of the Irish on the Catholic church in America in the nineteenth century | Egan, Patrick K. | Monograph or Collective Volume | National University of Ireland | 1968 |
| The influence of Tuairim on intellectual debate and policy formulation in Ireland, 1954-75 | Finn, Tomás | Thesis | | 2008 |
| The intellectual and political world of John Wilson Croker, 1780-1854 : ideas, circles and Conservatism | Portsmouth, Robert | Thesis | | 2008 |
| The Irish Catholic Episcopal Corps, 1657-1829: a prosopographical analysis | Derr, Eric | Thesis | | 2014 |
| The Irish convent chapel: the inspiration, design and patronage | Gilmartin, John Patrick Maiben | Thesis | | 2001 |
| The Irish Folklore Commission Questionnaire System, 1936-1945 | Folsom, Christina Marie | Thesis | | 2015 |
| The Irish home front, 1914-18, with particular reference to the treatment of Belgian refugees, prisoners-of war, enemy aliens and war casualties | O'Neill, Clare | Thesis | | 2006 |
| The Irish in Punjab, 1881-1921 | O'Leary, Patrick | Thesis | | 2008 |
| The Irish in Russia, 1690-1815 : travel, gender and self-fashioning | Byrne, Angela | Thesis | | 2008 |
| The Irish newspaper industry during the Great Famine, 1845-9 | Deane, Morgan | Thesis | | 2002 |
| The Irish state and the Big House in independent Ireland, 1922-73 | Crooke, Emer | Thesis | | 2014 |
| The Irish Transport and General Workers' Union and the labour press in Ireland, 1909-1920 | Curry, James | Thesis | | 2017 |
| The islands of Inishkea, County Mayo, 1750-1930 | Dornan, Brian Patrick | Thesis | | 1998 |
| The Labour Party and the 1922 general election in Ireland | Carroll, Denis | Thesis | | 2002 |
| The Lalors of Tenakill, 1767-1893 | O'Brien, Michael Gerard | Thesis | | 1987 |
| The land annuities agitation in Ireland, 1926-32 | Gahan, David | Thesis | | 2017 |
| The legacy of the Irish Parliamentary Party in Independent Ireland, 1922-49 | O'Donoghue, Thomas Patrick Martin | Thesis | | 2016 |
| The Letterkenny and Burtonport Railway, 1903-47 : its social context and environment | Sweeney, Frank | Thesis | | 2004 |
| The letters of George Wardell and the battle of Isandlwana, 1879. The recent acquisition of the family papers of lesser-known British Army Officer by Maynooth University Library will add greatly to the rich historiography of the Anglo-Zulu war. | Diver, Luke | Article in Journal | | 2016 |
| The life and career of Hugh Brady, bishop of Meath, 1563-84 | Walshe, Helen Mary | Thesis | | 1985 |
| The life and writings of Michael Moore (c.1639-1726) | Chambers, Liam | Thesis | | 2001 |
| The MacDonnells of Antrim on the continent | Walsh, Micheline | Monograph or Collective Volume | National University of Ireland | 1960 |
| The Making of the Anglo-Irish Agreement of 1985: A Memoir by David Goodall | | Monograph or Collective Volume | National University of Ireland | 20 |
| The making of the Irish Leviathan, 1603-25: state-buiding in Ireland | McLaughlin, Joseph Michael | Thesis | | 1999 |
| The medieval Irish Church and early Norse Christianity | Martin, Thomas | Thesis | | 2008 |
| The memoirs of a County Carlow school teacher : Edward O'Toole (1860-1943) | McGregor, Eileen M. | Thesis | | 2005 |
| The military in Kilkenny, 1800-1870 | Bolger, Liam | Thesis | | 2005 |
| The Missionary Society of Columban, 1916-1954 | Collins, Neil | Thesis | | 2007 |
| The Munich computus : text and translation : Irish alternatives to Bede's computistics | Warntjes, Immo | Thesis | | 2007 |
| The National Labour Party, 1944-1950 | Deasy, Eoin | Thesis | | 2007 |
| The National University of Ireland and Eamon de Valera | McCartney, Donal | Monograph or Collective Volume | University Press of Ireland | 1983 |
| The National University of Ireland and the changing structure of Irish higher education, 1967-2007 | Coolahan, John | Article in Book | | 2008 |
| The National University of Ireland, 1908-2008 : centenary essays | | Monograph or Collective Volume | University College Dublin Press, on behalf of the National University of Ireland | 2008 |
| The nature and development of liberal Protestantism in Waterford, 1800-1842 | Heggs, Elizabeth | Thesis | | 2008 |
| The naval forces of the Irish State, 1922-77 | Ó Confhaola, Pádhraic | Thesis | | 2010 |
| The New Irelanders: a study of Irish liberalism since 1972 | Horn, Gerard Edward | Thesis | | 1999 |
| The nineteenth century novel and Irish social history : some aspects | MacDonagh, Oliver | Monograph or Collective Volume | National University of Ireland | 1971 |
| The nobility of the English Pale in Tudor Ireland | Power, Gerald | Thesis | | 2008 |
| The O'Farrells of Annaly : the transformation of a late medieval lordship in early modern Ireland | Farrell, Neil | Thesis | | 2008 |
| The O'Neills in Spain | Walsh, Micheline | Monograph or Collective Volume | National University of Ireland | 1960 |
| The organisational work of Lady Ishbel Aberdeen [sic], marchioness of aberdeen and Temair (1857-1939) | Carruthers, Frances | Thesis | | 2001 |
| The origins and development of radio broadcasting in Ireland, c.1913-1960 | Hawkins, Mary Bridget | Thesis | | 2001 |
| The Pale and the Far North : government and society in two early Tudor Borderlands | Ellis, Steven G., 1950- | Monograph or Collective Volume | Officina Typographica for the National University of Ireland | 1988 |
| The palingenesis of maritime piracy and the evolution of contemporary counter-piracy initiatives | McCabe, Robert | Thesis | | 2015 |
| The parish of Kilfearagh, Co. Clare, 1835-50 | Murphy, Ignatius, Rev. | Thesis | | 1969 |
| The parish of Saint John the Evangelist, Dublin, 1600-1700 | Anderson, Katharine | Thesis | | 1997 |
| The political career of Erskine Hamilton Childers, 1905-74 | Hynes, Michael G. | Thesis | | 2008 |
| The politicisation of Leitrim, Sligo, and Mayo in the general election of 1852 | McNiffe, Liam Mary | Thesis | | 1979 |
| The politics of the poor law, 1900-1923 | Daniel, Martin Gerard | Thesis | | 1998 |
| The position of the Irish language | Ó Tuathaigh, M. A. G. (Gearóid) | Article in Book | NA | 2008 |
| The Post Office in Ireland, 1638-1840 | Hughes, Anthony | Thesis | | 2015 |
| The printed ballad in Ireland : a guide to the popular printing of songs in Ireland, 1760-1920 | Moulden, John Pointon | Thesis | | 2006 |
| The Protestant community in Sligo, 1914-1949 | Deigan, Patrick | Thesis | | 2008 |
| The Protestant Orphan Society, Dublin, 1828-1928 | Cooper, June E. | Thesis | | 2009 |
| The Quakers of County Tipperary, 1655-1924 | Ahern, Michael | Thesis | | 2002 |
| The Rathmines township and urban district: local government in Dublin, 1847-1930 | Ó Maitiú, Séamas | Thesis | | 2001 |
| The rebellion of James Eustace, Viscount Baltinglass III, 1580-81 | O'Connor, Elizabeth Ann | Thesis | | 1989 |
| The Recognised Colleges | Nolan, John | Article in Book | | 2008 |
| The response of central and local government to the crisis in the railway engineering industry in Dundalk, 1950-66 | McDonnell, Patrick | Thesis | | 1992 |
| The response of the Irish State to subversion, 1969-1981 | Ó Duibhir, Séan | Thesis | | 2015 |
| The restoration of the kingdom of Ireland, 1649-62 | Cronin, John Jeremiah | Thesis | | 1999 |
| The Ritchie Pickow photographic collection | Clesham, Brigid | Article in Journal | | 2005 |
| The role of convocation | Farren, Linda O'Shea | Article in Book | | 2008 |
| The role of reformist philanthropy in late nineteenth- and early twentieth-century Ireland: a case study of Rosa Mary Barrett (1845-1936) | Gallagher, Catherine | Thesis | | 1999 |
| The roles and representations of women in religious change and conflict in Leinster and south-east Munster, c.1560-c.1641 | McShane, Bronagh Ann | Thesis | | 2015 |
| The Senate and the changing role of the registrar | Halpin, Attracta | Article in Book | | 2008 |
| The social and cultural politics of heroic masculinity in twentieth-century Ireland : imaging Michael Collins | Carberry, Damien | Thesis | | 2007 |
| The social and ideological role of crannógs in early medieval Ireland | O'Sullivan, Aidan | Thesis | | 2004 |
| The social, cultural and intellectual milieu of the Burnell family of Dublin, 1562-1660 | Malone, Nessa | Thesis | | 2008 |
| The Society for Irish Church Missions to the Roman Catholics, 1849-1950 | Moffitt, Miriam | Thesis | | 2006 |
| The Society of St Vincent de Paul in Dublin, 1926-1975 | Ní Chearbhaill, Máire | Thesis | | 2008 |
| The State and the Landed Estate: order and shifting power relations in Ireland, 1815-1891 | McEntee, Joanne | Thesis | | 2013 |
| The story of Bernard F. Shields : the first professor of accountancy in the UK | Clarke, Peter | Article in Journal | | 2005 |
| The study of family history in Ireland | Barry, J. G. | Monograph or Collective Volume | National University of Ireland | 1967 |
| The supporters and no organisation? Cumann na nGaedheal organisation and policy, 1923-33 | Farrell, Mel | Thesis | | 2011 |
| The transmission of the earliest recension of Acallam na senórach | Breatnach, Caoimhín | Article in Book | | 2019 |
| The treatment of tuberculosis in Ireland from the 1890s to 1970s: a case study of medical care in Leinster | Carthy, Alan | Thesis | | 2015 |
| The University of Dublin, 1685-1750: a study of matriculation records | Hannigan, David | Thesis | | 1995 |
| The Urban Patriciates of early modern Ireland : a case-study of Limerick | Lennon, Colm | Monograph or Collective Volume | National University of Ireland | 1999 |
| The use of mythology in early Irish tracts | O'Gorman, Sarah Anne | Thesis | | 2000 |
| The Volunteers 1778-1793 : iconography and identity | O'Connor, Stephen | Thesis | | 2008 |
| The women graduates of the Royal University of Ireland, 1884-1900 | Hetherington, Nicholas | Thesis | | 2008 |
| The Wyndham Land Act, 1903 : the final solution to the Irish land question? | Cosgrove, Patrick | Thesis | | 2008 |
| Theobald McKenna and the catholic question | Leighton, Douglas Auld | Thesis | | 1985 |
| Thomas Drummond and the government of Ireland, 1835-41 | Ó Tuathaigh, M. A. G. (Gearóid) | Monograph or Collective Volume | National University of Ireland | 1978 |
| Thomas Francis Meagher | Gwynn, D. R. (Denis Rolleston), 1893-1972 | Monograph or Collective Volume | National University of Ireland | 1962 |
| Toirdelbach Ó Conchubair (1088-1156), king of Connacht, king of Ireland co fresabra | Ryan, John | Monograph or Collective Volume | National University of Ireland | 1966 |
| Transplantation to Connacht, 1641-1680 : theory and practice | Cunningham, John, 1984- | Thesis | | 2009 |
| Truce, treaty and civil war in Dublin city, 1921-23 | Hanley, John Paul | Thesis | | 1995 |
| Tyrone's rebellion: Hugh O'Neill and the outbreak of the Nine Years War | Finnegan, Micheal David | Thesis | | 2001 |
| Ulidia 2; Proceedings of the Second International Conference on the Ulster Cycle of Tales, National University of Ireland Maynooth, 24-27 June 2005 | | Monograph or Collective Volume | An Sagart | 2009 |
| Ulster emigration to colonial America, 1718-1730: the formative years | Warnock, Seán Simon | Thesis | | 1997 |
| Unfolding the past: the history and culture of a battle in the tailrace of Ardnacrusha | Maguire, Mark Harold | Thesis | | 1997 |
| University College Cork | Murphy, John A. | Article in Book | | 2008 |
| University College Dublin | McCartney, Donal | Article in Book | | 2008 |
| Urban morphology, social geography and the economics of local government: Kilkenny City, 1861-1922 | Donoghue, Fergal | Thesis | | 2017 |
| Violence and political factionalism and their effects on north Louth, 1870-1943 | Hall, Donal | Thesis | | 2010 |
| War veterans, land distribution and revolution in Ireland, 1919-1923 | Tynan, Edward Patrick | Thesis | | 2012 |
| Waste disposal and waste management in Dublin, 1850-1922 | Carroll, Denis J. | Thesis | | 2005 |
| Waterford merchants abroad | Pender, Séamus | Monograph or Collective Volume | National University of Ireland | 1964 |
| Westmoreland Lock Hospital Dublin and the treatment of syphilis, 1792-1900 | Walker, Jean | Thesis | | 2010 |
| Who was Malton? | Raftery, P. J. | Article in Journal | | 1955 |
| Wild Geese in Spanish Flanders: the Irish military community in Flanders, 1586-1610: an emerging identity | Henry, Anne Grainne | Thesis | | 1986 |
| Willam Thompson and mutual co-operation: an examination into the ideology of an Irish political scientist, 1775-1833 | Drennan, John | Thesis | | 1992 |
| William J. Walsh, 1908-21 | Keogh, Dáire | Article in Book | | 2008 |
| William King (1650-1729), man of faith and reason | Richardson, Joseph | Thesis | | 1998 |
| William Patrick Partridge (1874-1917) | Fitzsimons, Ann | Thesis | | 1997 |
| Women activists in Irish republican politics, 1900-1941 | Matthews, Ann Mary Elizabeth | Thesis | | 2003 |
| Women entrepreneurs and self-employed business-owners in Ireland 1922-1972 | Moylan, Therese | Thesis | | 2014 |
| Women writers of the Irish newspaper and periodical press, 1833-1870 | Carr, Deirdre M. | Thesis | | 2010 |
| ‘Go west and grow up with the country’: A study of German and Irish immigrant communities in the American Midwest, 1850-1900 | Donlon, Regina | Thesis | | 2014 |
| ‘The five year experiment’: The Encumbered Estates Court, 1849-54 | Crowley, Jacqueline | Thesis | | 2017 |