Bishops of both dioceses, since the Reformation
Bishops of Achonry
- Thomas O’Fihely (1547–1555)
- Cormac O’Coyn (1556–1561)
- Eugene O’Hart (1562–1603)
- See vacant (1603–1629)
- Andrew Lynch (Vicar Apostolic, appointed 1629)
- James Fallon (Vicar Apostolic 1631–1662)
- Maurice Durcan (Vicar Apostolic, appointed 1677)
- Hugh MacDermot (Vicar Apostolic 1684–1707, Bishop 1707–1725)
- Dominic O’Daly (1725–1735)
- John O’Hart (1735–1739)
- Walter Blake (1739–1758)
- Patrick Robert Kirwan (1758–1776)
- Philip Phillips (1776–1785)
- Boetius Egan (1785–1787)
- Thomas O’Connor (1788–1803)
- Charles Lynagh (1803–1808)
- John O’Flynn (1809–1817)
- Patrick MacNicholas (1818–1852)
- Patrick Durcan (1852–1875)
- Francis McCormack (1875–1887)
- John Lyster (1888–1911)
- Patrick Morrisroe (1911–1946)
- James Fergus (1947–1976)
- Thomas Flynn (1976–2007)
- Brendan Kelly (2007–2017)
- Sede Vacante (Fr Dermot Meehan, Diocesan Administrator)
- Paul Dempsey (2020-2024)
- Sede Vacante (Bishop Kevin Doran, Apostolic Administrator) 2024-2025
- Kevin Doran (2025-present)
Bishops of Elphin
- William Maginn (1539 – 1539)
- Gabriel de S. Serio OSB (1539 – 1541)
- Bernard Ó Domhnaill OFM (1541 – 1542)
- Bernard O Higgins OSA (1542 – 1545)
- John O Heyne (Apostolic Administrator) (1545 – 1562)
- Andrew O’Crean OP (1562 – c1590)
- Dermot O’Healy OFM (c1590 – c1600)
- Raymond Galvin (c1600 – 1620)
- Dermot McGrath OSA (Vicar Apostolic) (1620 – 1620)
- Nicholas of St Patrick (Vicar Apostolic) (1620 – 1625)
- Boetius Egan OFM (1625 – 1671)
- Dominic Burke OP (1671 – 1707)
- Ambrose MacDermott OP (1707 – 1718)
- Carbery O’Kelly (1718 – 1731)
- Patrick French OFM (1731 – 1748)
- John Brett OP (1748 – 1756)
- James O’Fallon (1756 – 1787)
- Edmund French (1787 – 1814)
- George Thomas Plunkett (1814 – 1827)
- Patrick Burke (1827 – 1844)
- George Joseph Plunkett Browne (1844 – 1858)
- Laurence Gillooly (1858 – 1895)
- John Clancy (1895 – 1913)
- Bernard Coyne (1913 – 1926)
- Edward Doorly (1926 – 1950)
- Vincent Hanly (1950 – 1971)
- Dominic Conway (1971 – 1994)
- Christopher Jones (1994 – 2014)
- Kevin Doran (2014 – present)