Lough Derg, historically Lough Dergart, is a freshwater lake in the Shannon River Basin, Ireland. It is the third-biggest on the island of Ireland and the second largest lake in the Republic of Ireland.

County Galway is a county in Ireland. It is in the Northern and Western Region, taking up the south of the province of Connacht. The county population was 276,451 at the 2022 census.