There have been only 13 horses who have won the Triple Crown which consists of winning all three races: The Kentucky Derby, the Preakness Stakes, and the Belmont Stakes. As of 2018 they 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), and Justify (2018).