Clonaghadoo is a village in County Laois, Ireland, located 6 km (3.7 mi) north of Mountmellick just off the N80 national secondary road. The Slieve Bloom Mountains lie southwest of the village.
There is a Catholic church, school and a community hall. The hall was originally a Clonaghadoo National School, opened in 1912. The name Clonaghadoo comes from Cluanacha Dubha, or the Black Meadows.
In the grounds of the church there is a labyrinth of low hedges and gravel paths.
Coordinates: 53°10′16″N 7°22′19″W / 53.1711°N 7.3719°W