Earl of Erne, of Crom Castle, is a title in the Peerage of Ireland. The subsidiary titles held along with the earldom are: Viscount Erne (created 1781), Baron Erne, of Crom Castle in the County of Fermanagh (1768) and Baron Fermanagh, of Lisnaskea in the County of Fermanagh (1876). The Barony of Fermanagh is the only one that is not in the Peerage of Ireland; it is instead in the Peerage of the United Kingdom.

Barons Erne (1768)

• Abraham Creighton, 1st Baron Erne (c. 1700-1772)
• John Creighton, 2nd Baron Erne (1731-1828) (became Earl Erne in 1789)

Earls of Erne (1789)

• John Creighton, 1st Earl of Erne (1731-1828), elected a Representative Peer in 1800
• Abraham Creighton, 2nd Earl of Erne (1765-1842)
• John Crichton, 3rd Earl of Erne (1802-1885), elected a Representative Peer in 1845
• John Henry Crichton, 4th Earl of Erne (1839-1914)
• John Henry George Crichton, 5th Earl of Erne (1907-1940)
• Henry George Victor John Crichton, 6th Earl of Erne (b. 1937)

Heir Apparent: John Henry Michael Ninian Crichton, Viscount Crichton