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.
In 1880 the Co Mayo estate of one of Erne's predecessors was the scene of a protest by land reformers against the then earl's agent, Captain Boycott.
Erne's great-grandfather was a Fermanagh MP, a lord of the Treasury, chief whip of the Conservative party and grand master of the Orange Order of Ireland.
Erne himself, however, was dismissed from the local unionist association in 1969 for supporting Northern Ireland's then liberal prime minister Terence O'Neill.