| 'From Casement Park to Toomebridge' : the commemoration to the Easter Rising in Northern Ireland in 1966 | O'Callaghan, Margaret | Article in Book | | 2007 |
| 'With the eyes of another race of a people once hunted themselves' : Casement, collonialism and a remembered past | O'Callaghan, Margaret | Article in Book | | 2004 |
| 'With the eyes of another race, of a people once hunted themselves' : Casement, colonialism and a remembered past | O'Callaghan, Margaret | Article in Book | | 2005 |
| 1916 in 1966 : commemorating the Easter Rising | | Monograph or Collective Volume | Royal Irish Academy | 2007 |
| An bóthar iarainn ó Leitir Ceanainn go hAilt a Choráin | O'Callaghan, Margaret | Article in Journal | | 2001 |
| Anglo-Irish relations | O'Callaghan, Margaret | Article in Journal | | 1993 |
| Arthur Balfour : Tory maker of modern Ireland | O'Callaghan, Margaret | Article in Book | | 2007 |
| British high politics and a nationalist Ireland : criminality, land and the law under Foster and Balfour | O'Callaghan, Margaret | Monograph or Collective Volume | Cork University Press | 1994 |
| Conor Cruise O’Brien and the Northern Ireland conflict : formulating a revisionist position | O'Callaghan, Margaret | Article in Journal | | 2018 |
| Crime, nationality and the law : the politics of land in late Victorian Ireland | O'Callaghan, Margaret | Thesis | | |
| Denis Patrick Moran and "the Irish colonial condition", 1891-1921 | O'Callaghan, Margaret | Article in Book | | 1993 |
| Franchise reform, "first past the post" and the strange case of Unionist Ireland | O'Callaghan, Margaret | Article in Journal | | 1997 |
| Introduction : Irish modernity and 'the patriot dead' in 1966 | Daly, Mary E.O'Callaghan, Margaret | Article in Book | | 2007 |
| Irish history 1780-1980 | O'Callaghan, Margaret | Article in Journal | | 1986 |
| Language and religion: the quest for identity in the Irish Free State, 1922-1932 | O'Callaghan, Margaret Mary | Thesis | | 1981 |
| Language, nationality and cultural identity in the Irish Free State, 1922-7 | O'Callaghan, Margaret | Article in Journal | | 1984 |
| New ways of looking at the state apparatus and the state archive in nineteenth-century Ireland : 'curiosities from that phonetic museum' - Royal Irish Constabulary reports and their political uses, 1879-91 | O'Callaghan, Margaret | Article in Journal | | 2004 |
| Old parchment and water : the Boundary Commission of 1925 and the copperfastening of the Irish border | O'Callaghan, Margaret | Article in Journal | | 2000 |
| Parnellism and crime : constructing a conservative strategy of containment 1887-1891 | O'Callaghan, Margaret | Article in Book | | 1991 |
| Political formations in the pre-first world war Ireland : the politics of the lost generation and the cult of Tom Kettle | O'Callaghan, Margaret | Article in Book | | 2010 |
| Propaganda wars: contexts for understanding the debate on the meanings of the Irish War of Independence | O'Callaghan, Margaret | Article in Journal | | 2013 |
| Recovering imagined futures in nationalist Ireland, in the summer of 1921 | O'Callaghan, Margaret | Article in Book | NA | 2023 |
| Reframing 1916 after 1969 : the Irish governments, a National Day of Reconciliation, and the politics of commemoration in the 1970s | O'Callaghan, Margaret | Article in Book | | 2016 |
| Religion and identity : the church and Irish independence | O'Callaghan, Margaret | Article in Journal | | 1983 |
| Richard Pigott, the fringe-Fenian press and the politics of Irish nationalist transition to Parnellism | O'Callaghan, Margaret | Article in Book | | 2009 |
| The Northern Ireland government, the 'Paisleyite movement' and Ulster Unionism in 1966 | O'Callaghan, MargaretO'Donnell, Catherine | Article in Journal | | 2007 |
| The past never stands still : commemorating the Easter Rising in 1966 and 1976 | O'Callaghan, Margaret | Article in Book | | 2017 |
| Women and politics in independent Ireland, 1921-1968 | | Article in Book | | 2002 |