Gregory John "Gregg" Hansford (8 April 1952 – 5 March 1995) was an Australian professional motorcycle and touring car racer. He competed in the FIM Grand Prix motorcycle racing world championships from 1978 to 1981 and in Australian touring car championships from 1982 to 1994. Hansford was a two-time vice-champion in the 250cc road racing world championships. With 10 Grand Prix victories to his credit, he is ranked fourth for the most Grand Prix wins by an Australian behind Mick Doohan (54 wins), Casey Stoner (38) and Wayne Gardner (18).