Sir Harry Lewis (24 January 1984–14 April 2009) was an American-bred Thoroughbred racehorse and sire best known for his win in the 1987 Irish Derby. After finishing second on his only appearance as a two-year-old he won his first two races in 1987 including the Dee Stakes. He finished fourth in the Epsom Derby before winning the Irish equivalent, which was then the most valuable race for three-year-olds ever run in Europe.