Gleann Cholm Cille, anglicised as Glencolumbkille or Glencolmcille, is a small district on the Atlantic coast of southwest County Donegal in Ireland. Named after Saint Colm Cille (Columba), it is also a civil parish in the historic barony of Banagh. Glencolmcille is in the Gaeltacht, and while it remains an Irish-speaking community, English has been steadily replacing Irish as the main language, with only 34% of residents speaking Irish on a daily basis in 2002. The village of Cashel is the main settlement in the district.

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.