Castlemitchell GFC is a Gaelic Athletic Association (GAA) club in County Kildare, Ireland, who reached senior status in the 1950s and again in the 1990s from a small catchment area, and is home club of 1998 All Ireland finalist Christy Byrne. It is also the home club Tadhg Fennin who still plays for the men's senior team, a 2000 Leinster Championship winner with Kildare also scoring a goal in the final that day against Dublin.