Carlow Castle is located near to the River Barrow in County Carlow, Ireland. It was built between 1207 and 1213, and is a National Monument of Ireland.

County Carlow is a county located in the Southern Region of Ireland, within the province of Leinster. Carlow is the second smallest and the third least populous of Ireland's 32 traditional counties. Carlow County Council is the governing local authority.