Fermanagh was a kingdom of Gaelic Ireland, associated geographically with present-day County Fermanagh.
Fermanagh may also refer to:
County Fermanagh, one of the six counties of Northern Ireland County Fermanagh (Parliament of Ireland constituency) until 1800 Fermanagh (UK Parliament constituency) 1801–85 Fermanagh GAA, intercounty sport team Fermanagh District Council, one of the 26 district councils of Northern Ireland, covering a slightly larger area than the county Fermanagh Township, Juniata County, Pennsylvania, USA Viscount Fermanagh junior title of Earl Verney Baron Fermanagh junior title of Earl Erne