John Anthony Gallagher, English-New Zealand rugby player
John Anthony Gallagher (born 29 January 1964) is a former rugby union and rugby league footballer who played in the 1980s and 1990s.

Born in England to Irish parents, he moved to New Zealand and played rugby union for New Zealand as a fullback, winning the World Cup in 1987.

In 1990, he moved to rugby league, playing for Leeds, and the London Crusaders as a fullback. Gallagher returned to rugby union and played one game for Ireland A in 1996.