Graham Appo (born 11 July 1974) is an Indigenous Australian former professional rugby league footballer of the 1990s and 2000s. He played throughout the back-line during his long career and was also a talented goal-kicker. Appo started playing first-grade club football in the New South Wales Rugby League premiership for the Canberra Raiders in 1994, winning the club's rookie of the year award. Early in the 1998 season, he joined the Adelaide Rams for their final season in the NRL, setting club records for most tries in a match (3), most tries in a season (12), most goals in a match (8), most points in a match (24) and most points for a season (116). He then moved to the Sydney City Roosters and later the North Queensland Cowboys for a season each.

Appo embarked on a career in the English Super League after the 2000 NRL season. In England, he played for the Huddersfield Giants and Warrington Wolves. Appo's best year came in 2003 when, covering at stand-off for the injured Lee Briers, he scored 23 tries for Warrington, in one game scoring a total of 34 points, which was the second-highest individual points haul for a player in Super League at the time. He was later named in that year's Super League Dream Team.