Castlemagner GAA is a Gaelic Athletic Association club based in the village of Castlemagner in the north-west of County Cork, Ireland. Founded in 1900, the club plays both hurling and football and is affiliated with Duhallow GAA. The club currently competes in the Duhallow Junior A Hurling Championship and the Duhallow Junior A Football Championship. At under age level, the Castlemagner club amalgamates with Kilbrin as Croke Rovers - as neither club have been able to field an underage team on their own. Ladies' Gaelic football and camogie are also played within the club.