The Bishop of Ossory, Ferns and Leighlin was the Ordinary of the Church of Ireland diocese of Ossory, Ferns and Leighlin in the Ecclesiastical Province of Dublin. The diocese consisted of counties Kilkenny, Carlow, Laois and Wexford in Ireland.
Under the Church Temporalities (Ireland) Act 1833 (3 & 4 Will. 4. c. 37), the bishopric was formed when the bishopric of Ossory merged with the bishopric of Ferns and Leighlin on 12 July 1835. Over the next one hundred and forty-two years, there were twelve bishops of the united diocese. In 1977, the see merged with bishopric of Cashel and Waterford to form the united bishopric of Cashel and Ossory.
| Bishops of Ossory, Ferns and Leighlin | |||
|---|---|---|---|
| From | Until | Ordinary | Notes |
| 1835 | 1841 | Robert Fowler | Appointed bishop of Ossory in 1813, became bishop of Ossory, Ferns and Leighlin when the dioceses were united on 12 July 1835; died 31 December 1841 |
| 1842 | 1874 | James Thomas O'Brien | Nominated 24 February and consecrated 20 March 1842; died 12 December 1874 |
| 1874 | 1878 | Robert Samuel Gregg | Elected 4 March and consecrated 30 March 1875; translated to Cork, Cloyne and Ross 4 July 1878 |
| 1878 | 1897 | William Pakenham Walsh | Elected 30 August and consecrated 29 September 1878; resigned 30 September 1897; died 30 July 1902 |
| 1897 | 1907 | John Baptist Crozier | Elected 20 October and consecrated 30 November 1897; translated to Down, Connor and Dromore 26 September 1907 |
| 1907 | 1911 | Charles Frederick D'Arcy | Translated from Clogher; elected 5 November 1907; translated to Down, Connor and Dromore 29 March 1911 |
| 1911 | 1915 | John Henry Bernard | Elected 14 June and consecrated 25 July 1911; translated to Dublin 7 October 1915 |
| 1915 | 1920 | John Allen Fitzgerald Gregg | Elected 20 November and consecrated 28 December 1915; translated to Dublin 20 September 1920 |
| 1920 | 1938 | John Godfrey FitzMaurice Day | Elected 15 June and consecrated 1 November 1920; translated to Armagh 27 April 1938 |
| 1938 | 1940 | Ford Tichborne | Elected 1 March and consecrated 24 June 1938; died 18 February 1940 |
| 1940 | 1961 | John Percy Phair | Elected 13 March and consecrated 11 June 1940; resigned 31 December 1961 |
| 1962 | 1977 | Henry Robert McAdoo | Elected 31 January and consecrated 11 March 1962; translated to Dublin 19 April 1977 |
| In 1977, the see became part of the united bishopric of Cashel and Ossory | |||
| align=center colspan="4" | Source(s):[1] | ||