Kilmacrennan, also Kilmacrenan, is a village, townland and civil parish in County Donegal, Ireland. The village population was 753, as of the 2016 census. The village's population has increased steadily over the last decade with many new housing developments catering, in particular, for an overspill population from Letterkenny. Kilmacrennan was historically the caput of its eponymous Barony of Kilmacrennan, of the eight Baronies of Donegal.

County Donegal is a county of Ireland in the province of Ulster and in the Northern and Western Region. It is named after the town of Donegal in the south of the county. It has also been known as County Tyrconnell or Tirconaill, after the historic territory. Donegal County Council is the local council and Lifford is the county town.