St. Amant (1901–1920) was a British Thoroughbred racehorse and sire. In a career that lasted from 1903 to 1906, he ran twenty-one times and won six races. As a three-year-old in 1904, he won both the 2000 Guineas Stakes and the Derby, but he failed to win the English Triple Crown when he was well beaten in the St. Leger by the filly Pretty Polly. He was kept in training for two more seasons but won only one more race before being retired.