| 100 years in the short grass : Naas Golf Club, founded 1896 | | Monograph or Collective Volume | Naas Golf Club | 1996 |
| A class apart : the gentry families of County Kildare | Costello, Con | Monograph or Collective Volume | Nonsuch Publishing | 2005 |
| A Kerry 'moonlighter' | Costello, Con | Article in Journal | | 1981 |
| A most delightful station : the British Army on the Curragh of Kildare, Ireland, 1855-1922 | Costello, Con | Monograph or Collective Volume | Collins Press | 1996 |
| An 18th century episcopal instruction for Ossory | Costello, Con | Article in Journal | | 1983 |
| Baiting the bull | Costello, Con | Article in Journal | | 1975 |
| Botany Bay : the story of the convicts transported from Ireland to Australia, 1791-1853 | Costello, Con | Monograph or Collective Volume | | 1987 |
| Botany Bay : the story of the convicts transported from Ireland to Australia, 1791-1853 | Costello, Con | Monograph or Collective Volume | Mercier Press | 1996 |
| Botany Bay : the story of the convicts transported from Ireland to Australia, 1791-1853 | Costello, Con | Monograph or Collective Volume | | 1987 |
| Exhibition of Silver | Costello, Con | Article in Journal | | 1996 |
| Faith or fatherhood? Bishop Dunboyne's dilemma : the story of John Butler, Catholic bishop of Cork 1763-1787 | Costello, Con | Monograph or Collective Volume | Woodfield Press | 2000 |
| Four eighteenth-century drawings of County Kildare | Costello, Con | Article in Journal | | 1992 |
| Glorious Punchestown : 150 years old | Costello, Con | Article in Journal | | 2000 |
| Guide to Co. Kildare and west Wicklow | Costello, Con | Monograph or Collective Volume | Leinster Leader | 1991 |
| In quest of an heir : the life and times of John Butler, Catholic bishop of Cork, Protestant baron of Dunboyne | Costello, Con | Monograph or Collective Volume | | 1978 |
| Ireland and the crusades | Costello, Con | Article in Journal | | 1970 |
| John O'Donovan's Curragh | Costello, Con | Article in Book | | 2006 |
| Kildare : saints, soldiers and horses | Costello, Con | Monograph or Collective Volume | Leinster Leader | 1991 |
| Ladytown watch house | Costello, Con | Article in Journal | | 1972 |
| Lena Boylan : obituary | Costello, Con | Article in Journal | | 2001 |
| Looking back : aspects of history, Co. Kildare | Costello, Con | Monograph or Collective Volume | Leinster Leader | 1988 |
| Pompey's pillar in Wexford | Costello, Con | Article in Journal | | 1976 |
| The barracks is excellent | Costello, Con | Article in Book | | 1996 |
| The convicts : transportation from Ireland | Costello, Con | Article in Book | | 1984 |
| The Curragh army camp : "a goodish place, sort of, in dry weather" | Costello, Con | Article in Journal | | 1998 |
| Thomas Burgh's Naas map-book | Costello, Con | Article in Journal | | 1987 |
| Thomas Sherrard's map of Naas, 1787 | Costello, Con | Article in Journal | | 1998 |
| Two priests of Naas | Costello, Con | Article in Journal | | 1987 |