Lloyd Duffy (born December 8, 1944) is a Canadian retired Champion jockey in Thoroughbred flat horse racing who uniquely is also a licensed driver of harness racing horses. As a teenager, Duff began attending harness racing events at a racetrack near his home. He left school to go to work for a local stable and eventually made his way to Toronto, Ontario where he was introduced to Thoroughbred racing. Having the physique necessary to be a jockey, he learned to ride and in 1966 obtained his jockey license. While he started his new career slowly, after earning his first win on June 29, 1967 he soon became one of the top apprentice jockeys on the Ontario circuit.