John McStay (born 24 December 1965 in Larkhall, South Lanarkshire) is a Scottish former professional footballer who played as a defender. He is a cousin of former Celtic player Paul McStay. McStay played for nine clubs in a sixteen-year professional career before moving into junior football with Glenafton Athletic in 2000. He went on to become assistant manager to Peter Hetherston at Albion Rovers, one of his former clubs. McStay also worked as a painter and decorator, including during breaks in his playing career, and was part of the maintenance department at Celtic Park.