| Aspects of the architectural heritage of Bray | O'Sullivan, John | Article in Book | | 1989 |
| Ballinphellig aerial ropeway | O'Sullivan, John | Article in Journal | | 2006 |
| Belfast city hospital : a photographic history | O'Sullivan, John | Monograph or Collective Volume | Ballyhay Books | 2003 |
| By Carraigdonn and Owenabue | O'Sullivan, John | Monograph or Collective Volume | Ballyheeda Press | 1990 |
| Cork city gaol | O'Sullivan, John | Monograph or Collective Volume | Ballyheeda Press | 1996 |
| Dr Denis J. Coffey, president of University College, Dublin, 1909-40 | O'Sullivan, John | Article in Journal | | 1945 |
| Lieutenant Michael John McLean | O'Sullivan, John | Article in Journal | | 1995 |
| Some local history | O'Sullivan, John | Article in Journal | | 1946 |
| The book of Bray | | Monograph or Collective Volume | Blackrock Teachers' Centre | 1989 |
| The Book of Dun Laoghaire | | Monograph or Collective Volume | Blackrock Teachers' Centre | 1987 |
| The evolution of Ballybrack and Killiney | O'Sullivan, John | Article in Book | | 1987 |
| The history of obstetrics in Northern Ireland, 1948-1992 | O'Sullivan, John Francis | Thesis | | 1996 |
| The Quin family of Bray | O'Sullivan, John | Article in Book | | 1989 |
| The width of yourself | O'Sullivan, John P. | Article in Journal | | 2019 |
| Wickerwork partition in an Athlone house | O'Sullivan, John C. | Article in Journal | | 1975 |