| 'Your Dinner's Poured Out!' : Boyhood in the Twenties in a Dublin that has disappeared | Crosbie, Paddy | Monograph or Collective Volume | O'Brien Press | 1981 |
| 1000 years of Irish whiskey | Magee, Malachy | Monograph or Collective Volume | O'Brien Press | 1980 |
| 16 lives : Con Colbert | O’Callaghan, John | Monograph or Collective Volume | O'Brien Press | 2015 |
| 16 lives : Éamonn Ceannt | Gallagher, Mary | Monograph or Collective Volume | O'Brien Press | 2014 |
| 16 lives : Edward Daly | Litton, Helen | Monograph or Collective Volume | The O'Brien Press | 2013 |
| 16 lives : James Connolly | Collins, Lorcan | Monograph or Collective Volume | O'Brien Press | 2012 |
| 16 lives : John MacBride | Fallon, Donal | Monograph or Collective Volume | O'Brien Press | 2015 |
| 16 lives : Michael O’Hanrahan | Kostick, Conor | Monograph or Collective Volume | O'Brien Press | 2015 |
| 16 lives : Patrick Pearse | O’Donnell, Ruán | Monograph or Collective Volume | O'Brien Press | 2016 |
| 16 lives : Roger Casement | Mitchell, Angus | Monograph or Collective Volume | O'Brien Press | 2013 |
| 16 lives : Seán Heuston | Gibney, John | Monograph or Collective Volume | O'Brien Press | 2013 |
| 16 lives : Seán Mac Diarmada | Feeney, Brian | Monograph or Collective Volume | O'Brien Press | 2014 |
| 16 lives : Thomas Clarke | Litton, Helen | Monograph or Collective Volume | O'Brien Press | 2014 |
| 16 lives : Thomas Kent | Ryan, Meda | Monograph or Collective Volume | O'Brien Press | 2016 |
| 16 lives : Thomas MacDonagh | Kenna, Shane | Monograph or Collective Volume | O'Brien Press | 2014 |
| A coward if I return, a hero if I fall : stories of Irish soldiers in WWI | Richardson, Neil | Monograph or Collective Volume | O'Brien Press | 2010 |
| A personal memoir of the thirties | Ó hEidirsceoil, Seán | Article in Book | | 1994 |
| A pocket history of Gaelic culture | Titley, Alan | Monograph or Collective Volume | O'Brien Press | 2000 |
| A pocket history of Ireland | Ó hEithir, Breandán | Monograph or Collective Volume | O'Brien Press | 1989 |
| A pocket history of Irish literature | Jeffares, A. Norman | Monograph or Collective Volume | O'Brien Press | 1997 |
| A pocket history of Irish traditional music | Ó hAllmhuráin, Gearóid | Monograph or Collective Volume | O'Brien Press | 1998 |
| A pocket history of the IRA | O'Brien, Brendan | Monograph or Collective Volume | O'Brien Press | 1997 |
| A pocket history of Ulster | Barton, Brian, 1944- | Monograph or Collective Volume | O'Brien Press | 1996 |
| A short history of Ireland's rebels | Llywelyn, Morgan | Monograph or Collective Volume | O'Brien Press | 2013 |
| A short history of Irish traditional music | Ó hAllmhuráin, Gearóid | Monograph or Collective Volume | O'Brien Press | 2017 |
| A world of stone : life folklore and legends of the Aran Islands | Curriculum Development Unit | Monograph or Collective Volume | O'Brien Press | 1977 |
| A world of stone. With revisions by Nora Godwin | O'Sullivan, Paul | Monograph or Collective Volume | O'Brien Press | 1977 |
| Abbeylara : the tragic shooting of John Carthy | Hennelly, Regina | Monograph or Collective Volume | O'Brien Press | 2007 |
| Afraid of the dark : the tragic story of Robert Holohan | Riegel, Ralph | Monograph or Collective Volume | O'Brien Press | 2006 |
| After the Celtic tiger : challenges ahead | Clinch, PeterConvery, FrankWalsh, Brendan M. | Monograph or Collective Volume | O'Brien Press | 2002 |
| All changed : fifty years of photographing Ireland | Doyle, ColmanQuinn, John | Monograph or Collective Volume | O'Brien Press | 2004 |
| All graduates and gentlemen : Marsh's Library | McCarthy, Muriel | Monograph or Collective Volume | O'Brien Press | 1980 |
| All hell will break loose | Currie, Austin | Monograph or Collective Volume | O'Brien Press | 2004 |
| An account of murder, mutiny and mayhem concerning the affairs of the blackest-hearted villains from Irish history | O'Shea, Joe | Monograph or Collective Volume | O'Brien Press | 2012 |
| An Irish voice | O'Dowd, Niall | Monograph or Collective Volume | O'Brien Press | 2010 |
| Anna Liffey : the river of Dublin | De Courcy, John | Monograph or Collective Volume | O'Brien Press | 1988 |
| Architecture and decoration | Casey, Noreen | Article in Book | | 1986 |
| As I was going down Sackville Street | Gogarty, Oliver St John | Monograph or Collective Volume | O'Brien Press | 1994 |
| Babyface goes to Hollywood : fighters, mobsters and film stars ; the Jimmy McLarnin story | Gallimore, Andrew | Monograph or Collective Volume | O'Brien Press | 2009 |
| Best-Loved Swift | Swift, Jonathan | Monograph or Collective Volume | The O'Brien Press | 2018 |
| Between the mountains and the sea : Dun Laoghaire - Rathdown county | Pearson, Peter | Monograph or Collective Volume | O'Brien Press | 2007 |
| Between the mountains and the sea : Dun Laoghaire Rathdown County | Pearson, Peter | Monograph or Collective Volume | O'Brien Press | 1998 |
| Bobby Sands, freedom fighter | Hunt, Gerry | Monograph or Collective Volume | O'Brien Press | 2016 |
| Bold, brilliant and bad: Irish women from history | Broderick, Marian | Monograph or Collective Volume | O'Brien Press | 2018 |
| Break-out : great prison escapes | Hayes, Patrick | Monograph or Collective Volume | O'Brien Press | 2004 |
| Brendan the navigator : exploring the ancient world | Simms, George Otto | Monograph or Collective Volume | O'Brien Press | 1989 |
| Buildings of Irish towns : treasures of everyday architecture | Shaffrey, MauraShaffrey, Patrick | Monograph or Collective Volume | O'Brien Press | 1983 |
| Buildings of the Irish countryside : everyday architecture in the rural landscape | Shaffrey, Patrick | Monograph or Collective Volume | O'Brien Press | 1984 |
| Communism in Dublin in the 1930s : the struggle against fascism | O'Riordan, Manus | Article in Book | | 1994 |
| Cooper's Ireland : drawings and notes from an eighteenth-century gentleman | Harbison, Peter | Monograph or Collective Volume | The O'Brien Press in association with the National Library of Ireland | 2000 |
| Cracking crime : Jim Donovan, forensic detective | O'Connor, Niamh | Monograph or Collective Volume | O'Brien Press | 2001 |
| Croach Patrick : a place of pilgrimage : a place of beauty | Hughes, Harry | Monograph or Collective Volume | O'Brien Press | 2018 |
| Crown and Castle : British rule in Ireland, 1800-1830 | Brynn, E. | Monograph or Collective Volume | O'Brien Press | 1978 |
| Dan Donnelly, 1788-1820 : pugilist, publican, playboy | Myler, Patrick | Monograph or Collective Volume | Lilliput | 2010 |
| Daniel O'Donnell - my story | O'Donnell, DanRowley, Eddie | Monograph or Collective Volume | O'Brien Press|Virgin | 1999 |
| Dark times, Decent Men: stories of Irishmen in World War II | Richardson, Neil | Monograph or Collective Volume | O'Brien Press | 2012 |
| De Valera in America : the rebel president's 1919 campaign | Hannigan, Dave | Monograph or Collective Volume | O'Brien Press | 2008 |
| Death in December : the story of Sophie Toscan du Plantier | Sheridan, Michael | Monograph or Collective Volume | O'Brien Press | 2002 |
| Decorative Dublin | Pearson, Peter | Monograph or Collective Volume | O'Brien Press | 2002 |
| Deep deception : Ireland's swimming scandals | McCarthy, Justine | Monograph or Collective Volume | O'Brien Press | 2010 |
| Digging up Dublin | | Monograph or Collective Volume | O'Brien Press | 1980 |
| Discover Cork | McCarthy, Kieran | Monograph or Collective Volume | O'Brien Press | 2003 |
| Discover Derry | Lacey, Brian | Monograph or Collective Volume | O'Brien Press | 1999 |
| Discover Kilkenny | Bradley, John, 1954-2014 | Monograph or Collective Volume | O'Brien Press | 2000 |
| Dowd's history of Limerick | | Monograph or Collective Volume | O'Brien Press | 1990 |
| Dublin 1913 : a divided city | Curriculum Development Unit | Monograph or Collective Volume | O'Brien Press | 1982 |
| Dublin 1913 : lockout and legacy | Granville, Gary | Monograph or Collective Volume | O'Brien Press | 2013 |
| Dublin : one thousand years | Conlin, Stephen | Monograph or Collective Volume | O'Brien Press | 1988 |
| Dublin and the Viking World | Clarke, Howard B.Dooley, SheilaJohnston, Ruth | Monograph or Collective Volume | O'Brien Press | 2018 |
| Dublin by design : architecture and the city | | Monograph or Collective Volume | O'Brien Press in association with the RIAI | 2020 |
| Dublin documentary | Kinsella, Thomas E. | Monograph or Collective Volume | O'Brien Press | 2006 |
| Dublin, city of literature | Bolger, Muriel | Monograph or Collective Volume | O'Brien Press | 2011 |
| Dublin: The Making of a Medieval City | Clarke, Howard B.Dent, SarahJohnson, Ruth | Monograph or Collective Volume | O'Brien Press | 2019 |
| Dublinia : the story of medieval Dublin | Clarke, Howard B.Dent, SarahJohnson, Ruth | Monograph or Collective Volume | O'Brien Press | 2002 |
| Dun Laoghaire Kingstown | Brady, AnneGillman, DanielPearson, Peter | Monograph or Collective Volume | O'Brien Press | 1991 |
| Enemy of the empire : life as an international undercover IRA activist | McGuire, Eamon | Monograph or Collective Volume | O'Brien Press | 2006 |
| Exploring Newgrange | Mac Uistín, Liam | Monograph or Collective Volume | O'Brien Press | 2007 |
| Exploring the Book of Kells | Simms, George Otto | Monograph or Collective Volume | O'Brien Press | 1988 |
| Eyewitness : four decades of northern life | Kelters, SeamusMurphy, Brendan | Monograph or Collective Volume | O'Brien Press | 2003 |
| Fairs and pilgrimages | Gmelch, Sharon | Article in Book | | 1979 |
| Fatal journey : the murder of Trevor O'Keefe | Kelly, JaneO'Keefe, Eroline | Monograph or Collective Volume | O'Brien Press | 2006 |
| Fear of the collar : Artane industrial school, my extraordinary childhood | Touher, Patrick | Monograph or Collective Volume | O'Brien Press | 1991 |
| Fear of the collar : my terrifying childhood in Artane | Touher, Patrick | Monograph or Collective Volume | O'Brien Press | 2001 |
| Festival fever : the Irish at Cheltenham | Holland, Anne | Monograph or Collective Volume | O'Brien Press | 2017 |
| Field and shore; daily life, and traditions : Aran islands, 1900 | Curriculum Development Unit | Monograph or Collective Volume | O'Brien Press | 1977 |
| Five cities | Shaffrey, Patrick | Article in Book | | 1979 |
| Forgotten revolution : Limerick Soviet 1919 : a threat to British power in Ireland | Cahill, Liam | Monograph or Collective Volume | O'Brien Press | 1990 |
| Four roads to Dublin : the history of Ranelagh, Rathmines and Leeson Street | Kelly, Deirdre | Monograph or Collective Volume | O'Brien Press | 1995 |
| Freedom of angels : surviving Goldenbridge orphanage | Fahy, Bernadette | Monograph or Collective Volume | O'Brien Press | 1999 |
| From earliest times | Raftery, Joseph | Article in Book | | 1979 |
| Goodnight, God bless and safe home : the golden showband era | O'Keefe, Finbar | Monograph or Collective Volume | O'Brien Press | 2002 |
| Green English : Ireland's influence on the English language | Todd, Loreto | Monograph or Collective Volume | O'Brien Press | 1999 |
| Gunrunners : the covert arms trail to Ireland | Boyne, Sean | Monograph or Collective Volume | O'Brien Press | 2006 |
| Gur cake and coal blocks | Mac Thomáis, Éamonn, 1927-2002 | Monograph or Collective Volume | O'Brien Press | 1976 |
| Hell or some worse place : Kinsale 1601 | Ekin, Des | Monograph or Collective Volume | The O'Brien Press | 2018 |
| Hidden soldier : an Irish Legionnarie's wars from Bosnia to Iraq | O'Keefe, PádraigRiegel, Ralph | Monograph or Collective Volume | O'Brien Press | 2007 |
| Historic Dublin : from walled town to Georgian capital | Conlin, Stephen | Monograph or Collective Volume | O'Brien Press | 1986 |
| History's daughter : a memoir of the only child of Terence MacSwiney | Brugha, Máire MacSwiney, 1918- | Monograph or Collective Volume | O'Brien Press | 2005 |
| Hostage : notorious Irish kidnappings | Howard, Paul | Monograph or Collective Volume | O'Brien Press | 2004 |
| I was a boy in Belsen | Pierce, NicolaReichental, Tomi | Monograph or Collective Volume | O'Brien Press | 2011 |
| In the blood : Irish racing dynasties | Holland, Anne | Monograph or Collective Volume | O'Brien Press | 2010 |
| In Wicklow, west Kerry and Connemara | Gmelch, GeorgeSaddlemyer, AnnSynge, John Millington, 1871-1909 | Monograph or Collective Volume | O'Brien Press | 1980 |
| Inishmurray : ancient monastic island | Heraughty, Patrick | Monograph or Collective Volume | O'Brien Press | 1982 |
| Insider : Gerry Bradley's life in the IRA | Bradley, GerryFeeney, Brian | Monograph or Collective Volume | O'Brien Press | 2011 |
| Insider : Gerry Bradley's life in the IRA | Bradley, GerryFeeney, Brian | Monograph or Collective Volume | O'Brien Press | 2009 |
| Introduction : beyond nationalism and complacency : the evolution of Thomas O'Brien | Klaus, H. Gustav | Article in Book | | 1994 |
| Ireland and the Spanish Civil War, 1935 to 1939 | Bell, J. Bowyer | Article in Book | | 1994 |
| Ireland in quotes : a history of the 20th century | O'Clery, Conor | Monograph or Collective Volume | O'Brien Press | 1999 |
| Ireland in the modern world | MacBride, Seán, 1904-1988 | Article in Book | | 1979 |
| Ireland's pirate trail : a quest to uncover our swashbuckling past | Ekin, Des | Monograph or Collective Volume | The O'Brien Press | 2018 |
| Ireland's war of Independence, 1919-21 : the IRA's guerrilla campaign | Collins, Lorcan | Monograph or Collective Volume | O'Brien Press | 2019 |
| Irish countryside buildings : everyday architecture in the rural landscape. A companion volume to Buildings of Irish towns | Shaffrey, MauraShaffrey, Patrick | Monograph or Collective Volume | O'Brien Press | 1985 |
| Irish fairy forts : portals to the past | Kerrigan, Jo | Monograph or Collective Volume | O'Brien Press | 2025 |
| Irish folk history : folktales from the North | Glassie, Henry | Monograph or Collective Volume | O'Brien Press | 1982 |
| Irish follies and whimsical architecture | Munday, George | Monograph or Collective Volume | O'Brien Press | 2023 |
| Irish Life | | Monograph or Collective Volume | O'Brien Press | 1979 |
| Irish life and traditions | | Monograph or Collective Volume | O'Brien Press | 1986 |
| Irish rebellions | Litton, Helen | Monograph or Collective Volume | O'Brien Press | 2018 |
| Irish stone walls : history, building and conservation | McAfee, Patrick | Monograph or Collective Volume | O'Brien Press | 1997 |
| Irish thatched cottages : a living tradition | Byrne, Emma | Monograph or Collective Volume | O'Brien Press | 2022 |
| James Connolly | Collins, Lorcan | Monograph or Collective Volume | The O'Brien Press | 2012 |
| Janey Mack, my shirt is black | Mac Thomáis, Éamonn, 1927-2002 | Monograph or Collective Volume | O'Brien Press | 1982 |
| Joe Cahill : a life in the IRA | Anderson, Brendan | Monograph or Collective Volume | O'Brien Press | 2002 |
| Joey Dunlop : King of the roads | Davison, Stephen | Monograph or Collective Volume | O'Brien Press | 2000 |
| John Charles McQuaid : ruler of Catholic Ireland | Cooney, John | Monograph or Collective Volume | O'Brien Press | 1999 |
| John Hunt : the man, the medievalist, the connoisseur | O'Connell, Brian | Monograph or Collective Volume | O'Brien Press | 2013 |
| Joseph Plunkett | Ó Brolcháin, Honor | Monograph or Collective Volume | O'Brien Press | 2012 |
| Kathleen Clarke : revolutionary woman | Clarke, KathleenLitton, Helen | Monograph or Collective Volume | O'Brien Press | 2008 |
| Kicking and screaming : dragging Ireland into the 21st century | Bacik, Ivana | Monograph or Collective Volume | O'Brien Press | 2004 |
| Kings of September : the day Offaly denied Kerry five in a row | Foley, Michael | Monograph or Collective Volume | O'Brien Press | 2007 |
| Land of my cradle days | Morrissey, Martin | Monograph or Collective Volume | O'Brien Press | 1990 |
| Lansdowne Road : the stadium ; the matches ; the greatest days | Clerkin, MalachySiggins, Gerard | Monograph or Collective Volume | O'Brien Press | 2010 |
| Last man standing : hurling goalkeepers | O'Connor, Christy | Monograph or Collective Volume | O'Brien Press | 2005 |
| Legendary Ireland : a journey through Celtic place and myths | Massey, Eithne | Monograph or Collective Volume | O'Brien Press | 2003 |
| Life sentence : murder victims and their families | Cleary, Catherine | Monograph or Collective Volume | O'Brien Press | 2004 |
| Looking under stones : roots, family and a Dingle childhood | O'Toole, Joe | Monograph or Collective Volume | O'Brien Press | 2003 |
| Markievicz the rebel countess | Moriarty, MarySweeney, Catherine | Monograph or Collective Volume | O'Brien Press | 1991 |
| Mary Robinson : an independent voice | Horgan, John, b. 1940 | Monograph or Collective Volume | O'Brien Press | 1997 |
| Me jewel and darlin' Dublin | MacThomáis, ÉamonnO'Brien, Michael | Monograph or Collective Volume | O'Brien Press | 1994 |
| Mean Streets: Limerick's gangland | Duggan, Barry | Monograph or Collective Volume | The O'Brien Press | 2012 |
| Mediaeval Dublin: Two historic walks | Broad, IanRosney, Bride | Monograph or Collective Volume | The O'Brien Press | 1982 |
| Medieval Dublin : two historic walks | Broad, IanRosney, Bride | Monograph or Collective Volume | O'Brien Press | 1982 |
| Michael Collins: Hero and Rebel | Massey, Ethine | Monograph or Collective Volume | O'Brien Press | 20 |
| Midwifery | Ross, Ian Campbell | Article in Book | | 1986 |
| Mother from hell: two brothers, a sadistic mother, a childhood destroyed | Doyle, Ken,Doyle, Patrick,Pierce, Nicola | Monograph or Collective Volume | O'Brien Press | 2009 |
| Munster hurling legends : seven decades of the greatest teams, players and games | Sweeney, Eamon | Monograph or Collective Volume | O'Brien Press | 2003 |
| Music | Boydell, Brian | Article in Book | O'Brien Press | 1986 |
| New Theatre Group plays | Klaus, H. Gustav | Article in Book | | 1994 |
| No ordinary women : Irish female activists in the revolutionary years, 1900-1923 | McCoole, Sinead | Monograph or Collective Volume | O'Brien Press | 2003 |
| No profit but the name : the Longfords and the Gate theatre | Cowell, John, 1912- | Monograph or Collective Volume | O'Brien Press | 1988 |
| O' Brien pocket history of the IRA : from 1916 onwards | O'Brien, Brendan | Monograph or Collective Volume | O'Brien Press | 2007 |
| O'Brien pocket history of Gaelic sports | Sweeney, Eamon | Monograph or Collective Volume | O'Brien Press | 2004 |
| O'Brien pocket history of Irish writers : from Swift to Heaney | Jeffares, A. Norman | Monograph or Collective Volume | O'Brien Press | 2005 |
| O'Brien pocket history of the Famine | O'Donnell, Ruán | Monograph or Collective Volume | O'Brien Press | 2008 |
| O'Brien pocket history of the troubles | Feeney, Brian | Monograph or Collective Volume | O'Brien Press | 2004 |
| O'Brien pocket history of the Troubles | Feeney, Brian | Monograph or Collective Volume | O'Brien Press | 2007 |
| Old days : old ways : [an illustrated folk history of Ireland] | Sharkey, Olive | Monograph or Collective Volume | O'Brien Press | 1985 |
| On the banks of the Dodder : Rathgar & Churchtown: An illustrated history | Walsh, Ged | Monograph or Collective Volume | The O'Brien Press | 2019 |
| On the road : from Tara to Tiananmen Square | Healy, Shay, 1943- | Monograph or Collective Volume | O'Brien Press | 2005 |
| One thousand years of Irish whiskey | Magee, Malachy | Monograph or Collective Volume | O'Brien Press | 1980 |
| Our lives out loud : in pursuit of justice and equality | Gilligan, Ann Louise, Katherine | Monograph or Collective Volume | O'Brien Press | 2008 |
| Paddy Reilly : from the fields of Athenry to the Dubliners and beyond | Reilly, Paddy | Monograph or Collective Volume | O'Brien Press | 2022 |
| Passing the time : folklore and history of an Ulster community | Glassie, Henry | Monograph or Collective Volume | O'Brien Press | 1982 |
| Peadar O'Donnell : Irish social rebel | McInerney, Michael | Monograph or Collective Volume | O'Brien Press | 1974 |
| People, politics and power : from O'Connell to Ahern | Collins, Stephen | Monograph or Collective Volume | O'Brien Press | 2007 |
| Phrases make history here : a century of Irish political quotations, 1886-1996 | O'Clery, Conor | Monograph or Collective Volume | O'Brien Press | 1986 |
| Politicians and other animals | O'Leary, Olivia | Monograph or Collective Volume | O'Brien Press | 2004 |
| Public virtue, public love : the early years of the Dublin lying-in hospital, the Rotunda | | Monograph or Collective Volume | The O'Brien Press | 1986 |
| Quinntessential Feargal : a memoir | Quinn, Feargal | Monograph or Collective Volume | O'Brien Press | 2016 |
| Rebellion! Ireland in 1798; incorporating a yearbook of 1798 bicentennial commemorative events | Gahan, Daniel J. | Monograph or Collective Volume | O'Brien Press for Comóradh '98 | 1997 |
| Regency rogue : Dan Donnelly, his life and legends | Myler, Patrick | Monograph or Collective Volume | O'Brien Press | 1976 |
| Round towers of Ireland | Corlett, Christiaan | Monograph or Collective Volume | O'Brien Press | 2025 |
| Saint Patrick: Life, Legend and Legacy | Broderick, Marian | Monograph or Collective Volume | The O'Brien Press | 2019 |
| Saltees | Merne, OscarRoche, Richard | Monograph or Collective Volume | O'Brien Press | 1977 |
| Saltees : islands of birds and legends | Roche, Richard | Monograph or Collective Volume | O'Brien Press | 1977 |
| Seán Boylan : the will to win : the autobiography as told to John Quinn | Boylan, SeánQuinn, John | Monograph or Collective Volume | O'Brien Press | 2006 |
| Shadows : an album of the Irish people, 1841-1914 | O'Connell, Michael | Monograph or Collective Volume | O'Brien Press and RTE | 1985 |
| Shawlies, Echo boys, the marsh & the lanes : old Cork remembered | Verdon, Michael | Monograph or Collective Volume | O'Brien Press | 1994 |
| Sinn Féin and the SDLP : from alienation to participation | Murray, Gerard | Monograph or Collective Volume | O'Brien Press | 2005 |
| Sinn Féin and the SDLP : from alienation to participation | Murray, GerardTonge, Jonathan | Monograph or Collective Volume | O'Brien Press | 2005 |
| Skellig : island outpost of Europe | Lavelle, Des | Monograph or Collective Volume | O'Brien Press | 1976 |
| Sligo, land of Yeats' desire : its history, literature, folklore and landscapes | Cowell, John, 1912- | Monograph or Collective Volume | O'Brien Press | 1989 |
| Spanish correspondence | O'Brien, Thomas | Article in Book | | 1994 |
| Spring and the labour story | Collins, Stephen | Monograph or Collective Volume | O'Brien Press | 1993 |
| St Patrick : the real story of Patrick who became Ireland's patron saint | Simms, George Otto | Monograph or Collective Volume | O'Brien Press | 1991 |
| Stakeknife : Britain's secret agents in Ireland | Harkin, GregIngram, Martin | Monograph or Collective Volume | O'Brien Press | 2004 |
| Staying the distance | Delaney, Ronnie | Monograph or Collective Volume | O'Brien Press | 2006 |
| Steps and steeples : Cork at the turn of the century | Lincoln, Colm | Monograph or Collective Volume | O'Brien Press | 1980 |
| Strong words, brave deeds : the poetry, life and times of Thomas O'Brien volunteer in the Spanish civil war | | Monograph or Collective Volume | O'Brien Press | 1994 |
| Taney : progress of a parish : a social and historical profile of the parish of Taney in Dublin | Robinson Tweed, Carol | Monograph or Collective Volume | O'Brien Press | 2018 |
| Ten thousand years deep : the story of Ireland's peatlands | Krieger, Carsten | Monograph or Collective Volume | O'Brien Press | 2025 |
| The 1890's and 1900's in Clare | MacLysaght, Edward | Article in Book | | 1979 |
| The 1920s in Donegal | Simms, George Otto | Article in Book | | 1979 |
| The 1930's on Aran | Ó hEithir, Breandán | Article in Book | | 1979 |
| The 1940's and 60's in Derry | McCafferty, Nell | Article in Book | | 1979 |
| The 1950s : Ireland in pictures | | Monograph or Collective Volume | O'Brien Press | 2013 |
| The 1960s : Ireland in pictures | | Monograph or Collective Volume | O'Brien Press | 2011 |
| The 1970s : Ireland in pictures | | Monograph or Collective Volume | O'Brien Press | 2013 |
| The 1980s : Ireland in pictures | | Monograph or Collective Volume | O'Brien Press | 2013 |
| The Aran Islands : as world of stone : history, traditions, landscape, stories | Fitzgerald, Mairéad Ashe | Monograph or Collective Volume | O'Brien Press | 2003 |
| The Best from The Bell | MacMahon, Sean | Monograph or Collective Volume | O'Brien Press | 1978 |
| The Blasket Islands : next parish America | Stagles, JoanStagles, Ray | Monograph or Collective Volume | O'Brien Press | 1980 |
| The Blasket Islands : next parish America | Stagles, JoanStagles, Ray | Monograph or Collective Volume | O'Brien Press | 2006 |
| The Blasket Islands : next parish to America | Anonymous | Monograph or Collective Volume | O'Brien Press | 1980 |
| The Celtic way of life | Anonymous | Monograph or Collective Volume | O'Brien Press | 1976 |
| The dirty dozen : Ireland's motor-sport legends | Kenny, John | Monograph or Collective Volume | O'Brien Press in association with RTE | 2007 |
| The Dublin marathon : celebrating 40 years | McGoldrick, Sean | Monograph or Collective Volume | O'Brien Press | 2019 |
| The early years of the Dublin Lying-in Hospital | Ross, Ian Campbell | Article in Book | | 1986 |
| The Easter Rising : a guide to Dublin in 1916 | Collins, LorcanKostick, Conor, 1964- | Monograph or Collective Volume | O'Brien Press | 2000 |
| The Gasmakers : historical perspectives on the Irish gas industry | O'Sullivan, Charles J. | Monograph or Collective Volume | O'Brien Press; Irish Gas Association | 1987 |
| The General : godfather of crime | Williams, Paul | Monograph or Collective Volume | O'Brien Press | 1995 |
| The Grand National : the Irish at Aintree | Holland, Anne | Monograph or Collective Volume | O'Brien Press | 2008 |
| The Granite Coast: Dún Laoghaire, Sandycove, Dalkey | Pearson, Peter | Monograph or Collective Volume | The O'Brien Press | 2022 |
| The Guinness story | Bourke, Edward J. | Article in Journal | | 2011 |
| The Guinness story : the family, the business, the black stuff | Bourke, Edward J. | Monograph or Collective Volume | O'Brien Press | 2009 |
| The Haughey file : the unprecedented career and last years of the Boss | Collins, Stephen | Monograph or Collective Volume | O'Brien Press | 1992 |
| The Invincibles : The Phoenix Park Assassinations and the conspiracy that shook an Empire | Kenna, Shane | Monograph or Collective Volume | The O'Brien Press | 2019 |
| The Irish town : an approach to survival | Shaffrey, Patrick | Monograph or Collective Volume | O'Brien Press | 1975 |
| The Joy | Howard, Paul | Monograph or Collective Volume | O'Brien Press | 1996 |
| The labour and the 'Royal' | Mac Thomáis, Éamonn, 1927-2002 | Monograph or Collective Volume | O'Brien Press | 1979 |
| The long war : the IRA and Sinn Féin from armed struggle to peace talks | O'Brien, Brendan | Monograph or Collective Volume | O'Brien Press | 1995 |
| The long war : the IRA and Sinn Féin, 1985 to today | O'Brien, Brendan | Monograph or Collective Volume | O'Brien Press | 1993 |
| The Orange Order | Jess, Mervyn | Monograph or Collective Volume | O'Brien Press | 2007 |
| The power game : Ireland under Fianna Fáil | Collins, Stephen | Monograph or Collective Volume | O'Brien Press | 2001 |
| The quiet revolution : the electrification of rural Ireland, 1946-1976 | Shiel, Michael J. | Monograph or Collective Volume | O'Brien Press|Tycooly International Publishing | 1984 |
| The Rose of Tralee : fifty years a-blooming | Dwyer, T. Ryle | Monograph or Collective Volume | O'Brien Press | 2009 |
| The same age as the state | Mhac an tSaoi, Máire | Monograph or Collective Volume | O'Brien Press | 2003 |
| The Skellig story : ancient monastic outpost | Lavelle, Des | Monograph or Collective Volume | O'Brien Press | 1993 |
| The sporting tradition | Redmond, Garry | Article in Book | | 1979 |
| The stars are our only warmth: Alice Leahy, a memoir | Cleary, CatherineLeahy, Alice | Monograph or Collective Volume | The O'Brien Press | 2018 |
| The stolen village : Baltimore and the Barbary pirates | Ekin, Des | Monograph or Collective Volume | O'Brien Press | 2006 |
| The three lives of Gavan Duffy | Pearl, C. | Monograph or Collective Volume | O'Brien Press|New South Wales University Press | 1979 |
| The valley of the kings : the Boyne : five thousand years of history | Boylan, Henry | Monograph or Collective Volume | O'Brien Press | 1988 |
| The voice of the people : songs and history of Ireland | Mulcahy, Michael | Monograph or Collective Volume | O'Brien Press | 1982 |
| The whiskeys of Ireland | Mulryan, Peter | Monograph or Collective Volume | O'Brien Press | 2002 |
| Tinkers and travellers | Gmelch, Sharon | Monograph or Collective Volume | O'Brien Press | 1975 |
| To Shorten the Road | Gmelch, George (Essays and Biographies) | Monograph or Collective Volume | The O'Brien Press | 1978 |
| Tony Gregory | Gilligan, Robbie | Monograph or Collective Volume | O'Brien Press | 2011 |
| Urban Ireland : development of towns and villages | Curriculum Development Unit | Monograph or Collective Volume | O'Brien Press | 1982 |
| Viking Dublin exposed : the Wood Quay saga | | Monograph or Collective Volume | O'Brien Press | 1984 |
| Voices of Ireland : conversations with Donncha Ó Dulaing | Boylan, HenryÓ Dúlaing, Donncha | Monograph or Collective Volume | O'Brien Press and RTE | 1984 |
| We Go Into Action Today at Noon ...: First-hand Accounts from Ireland’s Revolutionary Years, 1913–22 | Eamonn, Duggan | Monograph or Collective Volume | O'Brien Press | 20 |
| Where they lived in Dublin | Cowell, John, 1912- | Monograph or Collective Volume | O'Brien Press | 1980 |
| Wild Irish women : extraordinary lives from history | Broderick, Marian | Monograph or Collective Volume | O'Brien Press | 2012 |
| Wild Irish women : extraordinary lives from history | Broderick, Marian | Monograph or Collective Volume | O'Brien Press | 2002 |
| Words, written, spoken and sung | Mac Réamoinn, Seán | Article in Book | | 1979 |
| Young tigers and mongrel foxes : [a life in politics] | Harte, Paddy | Monograph or Collective Volume | O'Brien Press | 2005 |