Mahmoud (1933–1962) was a French-bred, British-trained Thoroughbred racehorse and sire. In a career which lasted from April 1935 to September 1936 he ran eleven times and won four races. In 1935 he won two of Britain's most important two-year-old races and was officially rated the second-best colt of his generation. In 1936 he won only once from five starts, but this win came in the Derby in which he set a race record which stood for fifty-nine years, and became the third of only four greys to win the race. After being retired from racing he was sold and exported to the United States, where he became a highly successful breeding stallion and was America's Champion sire in 1946.