Sir Ivor (May 5, 1965 - November 10, 1995) was an American-bred Irish-trained Thoroughbred racehorse and sire. who competed from a base in Ireland. In a career which lasted from July 1967 to October 1968 he ran thirteen times and won eight races. He won major races in four countries: the National Stakes in Ireland, the Grand Criterium in France, the 2000 Guineas and the Epsom Derby in England and the Washington, D.C. International in the United States.