| "God will defend the right" : the Protestant Churches and opposition to home rule | Megahey, Alan | Article in Book | Routledge | 2001 |
| "The portrait of the king is the king" : the biographers of Charles Stewart Parnell | Boyce, David George, 1942- | Article in Book | Routledge | 1991 |
| 'A deplorable narrative' : Gladstone, R. Barry O'Brien and the 'historical argument' for Home Rule, 1880-90 | Sheehy, Ian | Article in Book | Palgrave Macmillan | 2010 |
| A Conundrum of Irish Diasporic Identity : Mutative Ethnicity | O'Day, Alan | Article in Journal | | 2009 |
| A conundrum of Irish diasporic identity : mutative ethnicity | O'Day, Alan | Article in Journal | | 2009 |
| A conundrum of Irish diasporic identity : mutative ethnicity | O'Day, Alan | Article in Book | | 2011 |
| A survey of the Irish in England (1872) | Heinrick, HugoO'Day, Alan | Monograph or Collective Volume | The Hambledon Press | 1990 |
| A time of transitions | Boyce, David George, 1942-O'Day, Alan | Article in Book | | 2004 |
| Accommodation, conciliation and cooperation : a Gladstonian legacy | Fleming, N. C.,O'Day, Alan | Article in Book | | 2010 |
| Britain and the two Irelands since 1945 | O'Day, Alan | Article in Book | | 1991 |
| Charles Stewart Parnell | O'Day, Alan | Monograph or Collective Volume | Historical Association of Ireland | 1998 |
| Charles Stewart Parnell | O'Day, Alan | Monograph or Collective Volume | University College Dublin Press | 2012 |
| Defenders of the union : a survey of British and Irish unionism since 1801 | | Monograph or Collective Volume | Routledge | 2001 |
| Defending the union : parliamentary opinions, 1869 and 1886 | O'Day, Alan | Article in Book | | 2001 |
| Defining Ireland's place in parliamentary institutions : Isaac Butt and Parnell in the 1870s | O'Day, Alan | Article in Book | | 1995 |
| Gladstone and Ireland : politics, religion and nationality in the Victorian age | | Monograph or Collective Volume | Palgrave Macmillan | 2010 |
| Gladstone and Ireland : the legacy 1868-1974 | O'Day, Alan | Article in Journal | | 2001 |
| Gladstone and Irish nationalism : achievement and reputation | O'Day, Alan | Article in Book | | 2000 |
| Government & institutions in the post-1832 United Kingdom | O'Day, Alan | Monograph or Collective Volume | Mellen | 1995 |
| Home rule and the historians | O'Day, Alan | Article in Book | | 1996 |
| Imagined Irish Communities : Networks of Social Communication of the Irish Diaspora in the United States and Britain in the Late Nineteenth and Early Twentieth Centuries | O'Day, Alan | Article in Journal | | 2005 |
| Imagined Irish communities : networks of social communication of the Irish diaspora in the United States and Britain in the late nineteenth and early twentieth centuries | O'Day, Alan | Article in Journal | | 2005 |
| Introduction | Boyce, David George, 1942-O'Day, Alan | Article in Book | | 1991 |
| Introduction : 'revisionism' and the 'revisionist controversy' | Boyce, David George, 1942-O'Day, Alan | Article in Book | | 1996 |
| Introduction : dimensions of Irish terrorism | Alexander, YonahO'Day, Alan | Article in Book | | 1991 |
| Ireland and Anglo-Irish relations since 1800 : critical essays. Vol. 1, Union to the Land War | | Monograph or Collective Volume | Ashgate | 2008 |
| Ireland and Anglo-Irish relations since 1800 : critical essays. Vol. 2, Parnell and his legacy to the Treaty | | Monograph or Collective Volume | Ashgate | 2008 |
| Ireland and Anglo-Irish relations since 1800 : critical essays. Vol. 3, From the Treaty to the present | | Monograph or Collective Volume | Ashgate | 2008 |
| Ireland and Europe : theoretical perspectives | O'Day, Alan | Article in Book | | 2006 |
| Ireland and Scotland : the quest for devolved political institutions, 1867-1914 | O'Day, Alan | Article in Book | | 2005 |
| Ireland and the United Kingdom | O'Day, Alan | Article in Book | | 2004 |
| Ireland in transition, 1867-1921 | | Monograph or Collective Volume | Routledge | 2004 |
| Ireland's Catholics in the British state, 1850-1922 | O'Day, Alan | Article in Book | | 1992 |
| Ireland's terrorist trauma : interdisciplinary perspectives | | Monograph or Collective Volume | | 1989 |
| Irish diaspora politics in perspective : the United Irish Leagues of Great Britain and America, 1900-14 | O'Day, Alan | Article in Book | | 2000 |
| Irish diaspora politics in perspective : the United Irish Leagues of Great Britain and America, 1900-14 | O'Day, Alan | Article in Journal | | 1999 |
| Irish diaspora politics in perspective : the United Irish leagues of Great Britain and America, 1900–14 | O'Day, Alan | Article in Journal | | 1999 |
| Irish historical documents since 1800 | | Monograph or Collective Volume | Gill & Macmillan | 1992 |
| Irish home rule and Liberalism | O'Day, Alan | Article in Book | | 1979 |
| Irish home rule, 1867-1921 | O'Day, Alan | Monograph or Collective Volume | Manchester University Press | 1998 |
| Irish influence on parliamentary elections in London, 1885-1914 : a simple test | O'Day, Alan | Article in Book | | 1985 |
| Irish nationalism and Anglo-American relations in the late nineteenth and early twentieth centuries | O'Day, Alan | Article in Book | | 2000 |
| Isaac Butt and Irish nationality | O'Day, Alan | Article in Journal | | 1998 |
| Isaac Butt and neglected political economists | O'Day, Alan | Article in Book | | 2010 |
| Later Victorian Britain | | Monograph or Collective Volume | | 1988 |
| Max Weber and leadership, Butt, Parnell and Dillon : nationalism in transition | O'Day, Alan | Article in Book | | 2004 |
| Media and power : Charles Stewart Parnell's 1880 mission to North America | O'Day, Alan | Article in Book | | 2001 |
| Nationalism and political economy in Ireland : Isaac Butt's analysis | O'Day, Alan | Article in Book | | 2006 |
| Nationalism and the economic question in twentieth-century Ireland | O'Day, Alan | Article in Book | | 2000 |
| Parnell : orator and speaker | O'Day, Alan | Article in Book | | 1991 |
| Parnell and the first Home Rule episode 1884-87 | O'Day, Alan | Monograph or Collective Volume | | 1986 |
| Parnell and the first home rule episode 1884-87 | O'Day, Alan | Monograph or Collective Volume | NA | 1986 |
| Parnell in perspective | | Monograph or Collective Volume | Routledge | 1991 |
| Perspectives on Irish identity, nationalism and ethnicity | O'Day, Alan | Article in Book | | 2004 |
| Political economy and nationality : Isaac Butt, Charles Stewart Parnell and Michael Davitt reassessed | O'Day, Alan | Article in Book | | 2009 |
| Politics after Parnell | O'Day, Alan | Article in Journal | | 1997 |
| Revising the diaspora | O'Day, Alan | Article in Book | | 1996 |
| Rural Catholic mobilisation in Ireland, 1850-1922 | O'Day, Alan | Article in Book | | 1993 |
| Terrorism in Ireland | | Monograph or Collective Volume | Croom Helm|St. Martin's Press | 1984 |
| Terrorism's laboratory : the case of Northern Ireland | | Monograph or Collective Volume | Dartmouth | 1995 |
| The dilemma of violence in Northern Ireland | O'Day, Alan | Article in Book | | 1995 |
| The Edwardian age : conflict and stability 1900-1914 | | Monograph or Collective Volume | | 1979 |
| The English face of Irish nationalism : Parnellite involvement in British politics, 1880-86 | O'Day, Alan | Monograph or Collective Volume | Gill & Macmillan | 1977 |
| The formation of national elites | | Monograph or Collective Volume | Aldershot Publishing for the European Science Foundation | 1992 |
| The Gaelic revival in London, 1900-22 : limits of ethnic identity | Hutchinson, John, 1949-O'Day, Alan | Article in Book | | 1999 |
| The Irish problem | O'Day, Alan | Article in Book | NA | 1988 |
| The Irish terrorism experience | | Monograph or Collective Volume | Dartmouth | 1991 |
| The Longman handbook of modern Irish history since 1800 | Fleming, Neil C.O'Day, Alan | Monograph or Collective Volume | Pearson Longman | 2005 |
| The making of modern Irish history : revisionism and the revisionist controversy | | Monograph or Collective Volume | Routledge | 1996 |
| The political behaviour of the Irish in Great Britain in the late 19th and earlier 20th centuries | O'Day, Alan | Article in Book | | 2003 |
| The political organization of the Irish in Britain, 1867-1890 | O'Day, Alan | Article in Book | | 1989 |
| The political representation of the Irish in Great Britain, 1850-1940 | O'Day, Alan | Article in Book | | 1993 |
| The Ulster crisis : 1885-1921 | | Monograph or Collective Volume | Palgrave Macmillan | 2006 |
| The Ulster crisis : a conundrum | O'Day, Alan | Article in Book | | 2006 |
| The union : introduction | Boyce, David George, 1942-O'Day, Alan | Article in Book | | 2001 |
| Varieties of anti-Irish behaviour in Britain, 1846-1922 | O'Day, Alan | Article in Book | | 1996 |
| Varieties of anti-Irish behaviour in Britain, 1846-1922 | O'Day, Alan | Article in Book | | 1993 |