Gay Crusader (1914–1932) was a British Thoroughbred racehorse and sire who won a wartime version of the English Triple Crown in 1917. In a career which lasted from September 1916 and October 1917 he ran ten times and won eight races, including his last seven in succession. In addition to his three Classic wins he defeated older horses in the Newmarket Gold Cup and the Champion Stakes. Because of wartime restrictions, all of his races were at Newmarket Racecourse.