Chuck Sun (born September 10, 1956) is an American former professional motocross racer. He competed in the AMA Motocross Championships from 1976 to 1988. In 1980, Sun won the AMA 500cc motocross national championship. He is the only Asian American to have won a national championship in American professional motorcycle racing. In 2003, Sun was inducted into the AMA Motorcycle Hall of Fame.