| A study of modern political electoral systems with special reference to Ireland from 1800 to date | O'Leary, Cornelius | Thesis | | 1954 |
| Belfast approach to crisis : a study of Belfast politics, 1613-1970 | Budge, IanO'Leary, Cornelius | Monograph or Collective Volume | Macmillan | 1973 |
| Belfast urban government in the age of reform | O'Leary, Cornelius | Article in Book | | 1981 |
| Celtic nationalism | O'Leary, Cornelius | Monograph or Collective Volume | Queen's University of Belfast | 1982 |
| Controversial issues in Anglo-Irish relations, 1910-1921 | Maume, PatrickO'Leary, Cornelius | Monograph or Collective Volume | Four Courts | 2004 |
| Hogan : the development of a political scientist | O'Leary, Cornelius | Article in Book | | 2001 |
| Irish elections, 1918-77 | O'Leary, Cornelius | Monograph or Collective Volume | Gill & Macmillan | 1979 |
| Northern Ireland, 1921-72 : misshapen constitutional development and scholarly silence | O'Leary, Cornelius | Article in Book | | 1993 |
| Northern Ireland, 1945-72 | O'Leary, Cornelius | Article in Book | | 1979 |
| The Irish abortion and divorce referendum campaigns | Heath, TomO'Leary, Cornelius | Article in Journal | | 1988 |
| The Irish in the early days of St. Louis | O'Leary, Cornelius | Article in Journal | | 1910 |
| The Irish republic and its experiment with proportional representation | O'Leary, Cornelius | Monograph or Collective Volume | University of Notre Dame Press | 1961 |
| The Northern Ireland Assembly 1982-1986 : a constitutional experiment | O'Leary, CorneliusOthers | Monograph or Collective Volume | Queen's University Bookshop | 1988 |
| The Northern Ireland crisis and its observers | O'Leary, Cornelius | Article in Journal | | 1971 |