Mountshannon is a village in east County Clare, Ireland. It is part of the Catholic parish Mountshannon-Whitegate. The village is on the western shore of Lough Derg, north of Killaloe. Mountshannon won the Irish Tidy Towns Competition in 1981.

County Clare is a county in the province of Munster in the Southern part of the republic of Ireland, bordered on the west by the Atlantic Ocean. Clare County Council is the local authority. The county had a population of 127,938 at the 2022 census. The county seat and largest settlement is Ennis.