There have been 13 Triple Crown winners in United States Thoroughbred racing history. These horses are:
- Sir Barton (1919)
- Gallant Fox (1930)
- Omaha (1935)
- War Admiral (1937)
- Whirlaway (1941)
- Count Fleet (1943)
- Assault (1946)
- Citation (1948)
- Secretariat (1973)
- Seattle Slew (1977)
- Affirmed (1978)
- American Pharoah (2015)
- Justify (2018)
These horses won the Kentucky Derby, Preakness Stakes, and Belmont Stakes in the same year, which constitutes the American Triple Crown. The first winner was Sir Barton in 1919, and the most recent was Justify in 2018
