The club was formed in 1970 to facilitate Gaelic Athletic Association for people living in the Kealkill area (e.g.-Cappabue, Carriganass, Borlin, Ardnagashel, Coomhola etc.) instead of travelling to clubs further away like Bantry Blues, Glengariff, Dohenys, Ballingeary etc. The club was founded by Fr. John McCarthy (a native of Newcestown) who was appointed curate to Kealkil in 1970. The first meeting of the club was held in Coomhola National School on December 8, 1970. In 1971, the club entered teams in all grades open to it, and in the very first year reached the final of the West Cork Junior B Hurling Championship, only to be beaten after a replay by Bandon on the first Sunday in January 1972.
Two of St. Colum's most famous victories were in the Junior B grade. In 1997, St.Colum's comfortably defeated Glengariff in Bantry to win the county title and move into Junior A. In 2003, St.Colum's defeated Lisgould in Cork in a high quality close match to lift the Cork Junior Hurling Championship. 2013 was a very successful year for the club with the junior footballers defeating Caheragh to win the West Cork Final for the first time. They subsequently reached the county final but were narrowly defeated by Mitchelstown. 2013 also saw the hurlers reaching the hurling decider in Carbery losing to Dohenys. Underage success continued in 2013 with the u-16 footballers capturing a county title.