John G. Canty (January 30, 1917 - January 7, 1992) was an American Thoroughbred horse racing trainer. A native of Ireland, he came from a dynasty of Curragh racehorse trainers, including his father James (Jimmy) Canty, his maternal grandfather Philip (Philly) Behan and a great-grandfather Dan Broderick of Mountjoy Lodge. Other trainers in the extended family included his brother Phil Canty, their uncle Joe Canty (also for many decades Ireland's most successful jockey by lifetime wins) and Joe's son Joseph M. Canty.