Three-sided football is a variation of football with three teams instead of the usual two. It was devised by the Danish situationist Asger Jorn to disrupt one's everyday idea of football. Played on a hexagonal pitch, the game can be adapted for similarity to soccer as well as other versions of football.

It has been promoted in England, Scotland, Italy, Serbia and Austria by the Luther Blissett Three-sided Football League. The first known game played was organized by the London Psychogeographical Association at the Glasgow Anarchist Summer School in 1993.