| "After the Earl Bishop" : the management of Downhill in the nineteenth century | Proudfoot, Lindsay J. | Article in Book | Geography Publications | 1999 |
| "Our Magee problem" : Stormont and the second university | O'Brien, Gerard | Article in Book | Geography Publications | 1999 |
| A question of attitude : responses to the new Poor Law in Ireland and Scotland | O'Brien, Gerard | Article in Book | | 1988 |
| An account of a debate in the Irish parliament, 1787 | | Article in Journal | | 1986 |
| Anglo-Irish politics in the age of Grattan and Pitt | O'Brien, Gerard | Monograph or Collective Volume | Irish Academic Press | 1987 |
| Capital punishment in Ireland, 1922-1964 | O'Brien, Gerard | Article in Book | | 2006 |
| Catholic Ireland in the Eighteenth Century. Collected Essays of Maureen Wall | Wall, Maureen (née Mac Geehin)
| Monograph or Collective Volume | Geography Publications | 1989 |
| Charles Gavan Duffy, 1816-1903 : rebel and statesman | O'Brien, Gerard | Article in Book | | 1992 |
| Cosherers, wanderers and vagabonds : the treatment of the poor and insane in Ireland | O'Brien, Gerard | Article in Journal | | 1988 |
| Derry and Londonderry : history and society : interdisciplinary essays on the history of an Irish county | | Monograph or Collective Volume | Geography Publications | 1999 |
| Faeries, felons and fine gentlemen : a history of The Glen, Cork 1700-1980 | O'Brien, Gerard Martin | Monograph or Collective Volume | Blue Horse Press | 2022 |
| Francophobia in later eighteenth-century Irish history | O'Brien, Gerard | Article in Book | | 1990 |
| Illusion and reality in late eighteenth century politics | O'Brien, Gerard | Article in Journal | | 1988 |
| Irish governmenrts and the guardianship of historical records, 1922-1972 | O'Brien, Gerard | Monograph or Collective Volume | Four Courts | 2004 |
| Lockwood and after | O'Brien, Gerard | Article in Book | | 2009 |
| O'Briens best drinks | O'Brien, Gerard | Article in Journal | | 2004 |
| Parliament, politics and people : essays in eighteenth-century Irish history | | Monograph or Collective Volume | Irish Academic Press | 1989 |
| Robert Peel and the pursuit of Catholic emancipation, 1813-1817 | O'Brien, Gerard | Article in Journal | | 1988 |
| Scotland, Ireland, and the antithesis of Enlightenment | O'Brien, Gerard | Article in Book | | 1995 |
| State intervention and the medical relief of the Irish poor, 1787-1850 | O'Brien, Gerard | Article in Book | | 1999 |
| The beginning of the veto controversy in Ireland | O'Brien, Gerard | Article in Journal | | 1987 |
| The Dublin anti-union riot of 3 December 1759 | Murphy, Seán | Article in Book | Irish Academic Press | 1989 |
| The establishment of poor-law unions in Ireland, 1838-43 | O'Brien, Gerard | Article in Journal | | 1982 |
| The Grattan mystique | O'Brien, Gerard | Article in Journal | | 1986 |
| The Irish church in the eleventh and twelfth centuries | Gwynn, AubreyO'Brien, Gerard | Monograph or Collective Volume | | 1992 |
| The missing personnel records of the R.I.C. | O'Brien, Gerard | Article in Journal | | 1999 |
| The new Poor Law in prefamine Ireland : a case study | O'Brien, Gerard | Article in Journal | | 1985 |
| The record of the first Dáil debates | O'Brien, Gerard | Article in Journal | | 1993 |
| The strange death of the Irish language, 1780-1800 | O'Brien, Gerard | Article in Book | | 1989 |
| The unimportance of public opinion in eighteenth-century Britain and Ireland | O'Brien, Gerard | Article in Journal | | 1993 |
| The University of Ulster : genesis & growth | | Monograph or Collective Volume | Four Courts | 2009 |
| War and politics in Ireland 1649-1730. | Hayton, D. W. (David William)O'Brien, GerardSimms, J. G. (John Gerald) | Monograph or Collective Volume | Hambledon | 1986 |
| Workhouse management in pre-famine Ireland | O'Brien, Gerard | Article in Journal | | 1986 |