| A bibliography of Books by Seamus O'Kelly | O'Hegarty, P. S. | Monograph or Collective Volume | [s.n.] | 1934 |
| A bibliography of books by the O'Rahilly, Tom Clarke, Micheál Ó hAnnracháin and Countess de Markievicz | O'Hegarty, P. S. | Monograph or Collective Volume | [s.n.] | 1936 |
| A bibliography of books written by P. H. Pearse | O'Hegarty, P. S. | Monograph or Collective Volume | A. Thom | 1931 |
| A bibliography of books written by Standish O'Grady | O'Hegarty, P. S. | Monograph or Collective Volume | Alex. Thom | 1930 |
| A bibliography of books written by Thomas MacDonagh and Joseph Mary Plunkett | O'Hegarty, P. S. | Monograph or Collective Volume | Printed for the author by A. Thom | 1931 |
| A bibliography of Dr Douglas Hyde | O'Hegarty, P. S. | Monograph or Collective Volume | [s.n.] | 1939 |
| A bibliography of Dr. Douglas Hyde | O'Hegarty, P. S. | Article in Journal | | 1939 |
| A bibliography of James Clarence Mangan | O'Hegarty, P. S. | Article in Journal | | 1941 |
| A bibliography of James Joyce | O'Hegarty, P. S. | Article in Journal | | 1946 |
| A bibliography of Joseph Campbell | O'Hegarty, P. S. | Monograph or Collective Volume | Thomas | 1940 |
| A bibliography of William Allingham | O'Hegarty, P. S. | Monograph or Collective Volume | Privately printed | 1945 |
| A History of Ireland under the Union 1801 to 1922 : With an Epilogue carrying the story down to the acceptance in 1927 by de Valera of the Anglo-Irish Treaty of 1921 | O'Hegarty, P. S. | Monograph or Collective Volume | | 1952 |
| A history of Ireland under the Union, 1801 to 1922; with an epilogue carrying the story down to the acceptance in 1927 by De Valera of the Anglo-Irish treaty of 1921 | O'Hegarty, P. S. | Monograph or Collective Volume | | 1952 |
| A short memoir of Terence MacSwiney | O'Hegarty, P. S. | Monograph or Collective Volume | Talbot Press | 1922 |
| About Ulster novelists | O'Hegarty, P. S. | Article in Journal | | 1942 |
| Bibliographies of 1916 and the Irish revolution : 12, Arthur Griffith; 13, Michael Collins; 14, Kevin O'Higgins, 15, Darrell Figgis | O'Hegarty, P. S. | Article in Journal | | 1937 |
| Bibliographies of 1916 and the Irish revolution : no. 17, Roger Casement | O'Hegarty, P. S. | Article in Journal | | 1949 |
| Bibliographies of 1916 and the Irish Revolution, 16 : Erskine Childers | O'Hegarty, P. S. | Article in Journal | | 1948 |
| Glimpse of an Irish felon's prison life | Clarke, ThomasO'Hegarty, P. S. | Monograph or Collective Volume | Mansell and Roberts | 1922 |
| John Mitchel | O'Hegarty, P. S. | Article in Book | | 1942 |
| Jonathan Swift : Irishman | O'Hegarty, P. S. | Article in Journal | | 1945 |
| Kickham's novels | O'Hegarty, P. S. | Article in Journal | | 1938 |
| MacGeoghegan's history | O'Hegarty, P. S. | Article in Journal | | 1942 |
| Michael Hogan's Lays and legend of Thomond | O'Hegarty, P. S. | Article in Journal | | 1940 |
| Notes on the bibliography of W. B. Yeats | O'Hegarty, P. S. | Article in Journal | | 1940 |
| Notes on the Irish language columns of 'The Shamrock' | O'Hegarty, P. S. | Article in Journal | | 1945 |
| Pádraic Ó Conaire | O'Hegarty, P. S. | Article in Journal | | 1944 |
| Sinn Féin, an illumination | O'Hegarty, P. S. | Monograph or Collective Volume | Maunsell | 1919 |
| Some association books of Irish interest | O'Hegarty, P. S. | Article in Journal | | 1948 |
| Some bibliographical notes on Dublin editions of Swift | O'Hegarty, P. S. | Article in Journal | | 1939 |
| Some Irish 18th century editions of Shakespeare, not recorded by Jaggard, Stockwell or Ford | O'Hegarty, P. S. | Article in Journal | | 1952 |
| Some memoirs of Dr Crone | O'Hegarty, P. S. | Article in Journal | | 1946 |
| Some notes on the bibliography of J. M. Synge, supplemental to Bourgeois and MacManus | O'Hegarty, P. S. | Article in Journal | | 1942 |
| Somervilles and their connections in Cork | | Article in Journal | | 1942 |
| The 'Library of Ireland', 1845-1847 | O'Hegarty, P. S. | Article in Book | | 1945 |
| The Abbey Theatre (Wolfhound) series of plays | O'Hegarty, P. S. | Article in Journal | | 1947 |
| The Cork numismatist | O'Hegarty, P. S. | Article in Journal | | 1942 |
| The Dublin 'Saturday Magazine', 1865-67 | O'Hegarty, P. S. | Article in Journal | | 1942 |
| The mosquito press | O'Hegarty, P. S. | Article in Journal | | 1946 |
| The political background of Benburb | O'Hegarty, P. S. | Article in Journal | | 1945 |
| The truth about Robert Emmet | O'Hegarty, P. S. | Article in Journal | | 1950 |
| The victory of Sinn Féin : how it won and how it used it | Garvin, TomO'Hegarty, P. S. | Monograph or Collective Volume | University College Dublin Press | 1998 |
| W. B. Yeats and revolutionary Ireland of his time | O'Hegarty, P. S. | Article in Journal | | 1939 |