This list includes racehorses that exist in the historical record.
Racehorses
For competition horses, such as show jumpers and dressage horses, see .
A
A.P. Indy: 1992 Santa Anita Derby, Belmont Stakes, and Breeders' Cup Classic winner, major breeding sire after racing Aboyeur: 1913 Epsom Derby winner Accelerate: 2018 Breeders' Cup Classic winner Ace Impact: Undefeated winner of the 2023 Prix de l'Arc de Triomphe Achievement: 1867 1000 Guineas Stakes, Coronation Stakes, and St Leger Stakes winner Ack Ack: 1971 American Horse of the Year Action This Day: 2003 Breeders' Cup Juvenile winner Adam's Apple: 1927 2000 Guineas Stakes winner Adayar: 2021 Epsom Derby and King George VI and Queen Elizabeth Stakes winner Adios Butler: Famous harness racer Admiral's Voyage: American multiple-stakes winner Admire Groove: Winner of the 2003 and 2004 Queen Elizabeth II Commemorative Cup Admire Moon: 2007 Japanese Horse of the Year, known for winning that year's Dubai Duty Free Stakes, Takarazuka Kinen and Japan Cup Admire Vega: Winner of the 1999 Japanese Derby Affectionately: 1962 American Champion Two-Year-Old Filly and 1965 American Champion Sprint Horse. Dam of 1970 co-American Horse of the Year Personality. Affirmed: U.S. Triple Crown winner (1978) Afleet Again: 2011 Breeders' Cup Marathon winner Afleet Alex: 2005 Preakness Stakes and Belmont Stakes winner, American champion 3-year-old of 2005 Africander: 1903 Belmont Stakes winner and American Champion 3-year-old Agile: 1905 Kentucky Derby winner Agnes Digital: American-born Japanese racehorse known for winning the 2001 Tennō Shō (Autumn), the 2001 Hong Kong Cup, and the 2003 Yasuda Kinen, as well as his ability to run on dirt surfaces just as well as turf Agnes Flight: 2000 Tōkyō Yūshun winner Agnes Flora: 1990 Oka Sho winner. Dam of both Agnes Flight and Agnes Tachyon Agnes Tachyon: Undefeated 2001 Satsuki Sho winner, sire of Daiwa Scarlet Aimwell: 1785 Epsom Derby winner Air Groove: Winner of the 1996 Yushun Himba, 1997 Tennō Shō (Autumn), and 1998 Ōsaka Hai Air Jihad: Won both the Yasuda Kinen and Mile Championship in the same year (1999) Air Messiah: Winner of the 2005 Shūka Shō Air Shakur: Winner of the 2000 Satsuki Sho and Kikuka Sho Airborne: 1946 Epsom Derby and St. Leger Stakes winner Ajax: 18 consecutive race wins, before he was defeated at 1/40 Ajina: 1997 Breeders' cup Distaff winner and American champion 3-year-old filly Alan-a-Dale: 1902 Kentucky Derby winner Albatross: Harness racer who won 59 of 71 races, and as a sire produced winners of over $130 million, including Niatross Alcide: 1958 St Leger Stakes and King George VI and Queen Elizabeth Stakes winner Algerine: 1876 Belmont Stakes winner Allabaculia: Winner of the inaugural St Leger Stakes in 1776 Allez France: French Arc winner and first filly to win a million dollars Almahmoud: Influential broodmare, dam of Natalma and Cosmah Almond Eye: Won 9 G1 races, setting a new record in Japan, including all three of the Japanese Fillies' Triple Crown in 2018 and the Japan Cup twice (2018, 2020) Aloma's Ruler: 1982 Preakness Stakes winner Alphabet Soup: 1996 Breeders' Cup Classic winner Alsab: 1942 Preakness Stakes winner, American champion 2-year-old and 3-year-old, ranked in Top 100 American racehorses of the 20th Century Altisidora: 1813 St Leger Stakes winner Always Dreaming: 2017 Kentucky Derby winner Alydar: Finished second to Affirmed in all three 1978 Triple Crown races; successful sire Alysheba: 1987 Kentucky Derby and Preakness Stakes winner, 1988 Breeders' Cup Classic winner Amato: 1838 Epsom Derby winner, won in his only race Amberoid: 1966 Belmont Stakes winner Ambidexter: 1790 St Leger Stakes winner Ambrosio: 1796 St Leger Stakes winner American Flag: 1925 Belmont Stakes winner and American Champion 3-year-old American Pharoah: 2015 winner of the U.S. Triple Crown and Breeders' Cup World Championships in Lexington, Kentucky at Keeneland Race Course Andover: 1854 Epsom Derby winner Anees: 1999 Breeders' Cup Juvenile winner Angel of Empire: 2023 Arkansas Derby winner Animal Kingdom: American Thoroughbred racehorse; won 137th Kentucky Derby and 2013 Dubai World Cup Answer Lively: 1998 Breeders' Cup Juvenile winner Anthony Van Dyck: 2019 Epsom Derby winner Antonio: 1819 St Leger Stakes winner Apapane: 2010 Japanese Fillies' Triple Crown and Victoria Mile winner Apollo: 1882 Kentucky Derby winner April the Fifth: 1932 Epsom Derby winner Arazi: American-bred French-bred horse that won the Prix Morny, Prix de la Salamandre, Grand Critérium, and Breeders' Cup Juvenile in 1991. European Horse of the Year for 1991 Arcangelo: 2023 Belmont Stakes and Travers Stakes winner Arcangues: 1993 Prix d'Ispahan and Breeders' Cup Classic winner Archduke: 1799 Epsom Derby winner Archer: First and second winner of the Melbourne Cup Arctic Cosmos: 2010 St Leger Stakes winner Arctic Prince: 1951 Epsom Derby winner Ard Patrick: 1902 Epsom Derby winner. Also winner of Prince of Wales's Stakes and Eclipse Stakes, and later a leading sire in Germany Aristides: Winner of the first Kentucky Derby Arkle: Highest Timeform rating for a steeplechase horseracer Arrogate: Winner of Travers Stakes, Breeders' Cup Classic, Pegasus World Cup, and Dubai World Cup in track record time and the richest U.S.-based racehorse of all time Artax: 1999 Breeders' Cup Sprint winner, American champion sprint horse Artie Schiller: 2005 Breeders' Cup Mile winner Arts and Letters: 1969 Belmont Stakes winner and American Horse of the Year Ashado: 2004 Breeders' Cup Distaff winner, American champion 3-year-old filly in 2004 and champion older mare in 2005 Ashton: 1809 St Leger Stakes winner Assassin: 1782 Epsom Derby winner Assault: U.S. Triple Crown winner (1946) Assignee: 1894 Preakness Stakes winner Aston Machan: 2007 Sprinters Stakes winner whose career was cut short at age four due to acute heart failure Athens Wood: 1971 St Leger Stakes winner Atlantic: 1874 2000 Guineas Stakes winner Attila: 1842 Epsom Derby winner Audarya: French-bred British-trained horse that won the Prix Jean Romanet and Breeders' Cup Filly & Mare Turf in 2020 Auguste Rodin: Winner of both the Epsom and Irish Derbies of 2023, as well as the Breeders' Cup Turf of the same year Aurelius: 1961 St Leger Stakes winner Aureole: 1954 Coronation Cup and King George VI and Queen Elizabeth Stakes winner. Significant sire after racing Australia: Irish-bred horse that won the Epsom Derby and Irish Derby in 2014 Authentic: 2020 Kentucky Derby and Breeders' Cup Classic winner, American Horse of the Year Authorized: 2007 Epsom Derby and International Stakes winner Avatar: 1975 Belmont Stakes winner Awesome Again: winner of the 1997 Queen's Plate, Travers Stakes & Super Derby, 1998 Whitney Handicap and Breeders' Cup Classic Awesome Feather: 2010 Breeders' Cup Juvenile Fillies winner Ayrshire: 1888 2000 Guineas Stakes and Epsom Derby winner Azeri: 2002 Breeders' Cup Distaff winner and American horse of the year. American champion older mare 2002–2004 Azor: 1817 Epsom Derby winner Azra: 1892 Kentucky Derby and Travers Stakes winner
B
Baden-Baden: 1877 Kentucky Derby winner Bahram: Irish-bred British-trained horse that won the English Triple Crown in 1935 Baldric: 1964 2000 Guineas Stakes and Champion Stakes winner Bally Ache: 1960 Preakness Stakes winner Ballymoss: 1957 Irish Derby and St Leger Stakes, and 1958 Prix de l'Arc de Triomphe winner. Banks Hill: British-bred French-trained horse that won the Coronation Stakes and Breeders' Cup Filly & Mare Turf in 2001 and the Prix Jacques Le Marois in 2002 Barack Obama: Named after Barack Obama the 44th President of the United States, a New Zealand horse that competed in international endurance events. Barathea: Irish 2,000 Guineas winner in 1993 and Breeders' Cup Mile winner in 1994. European Horse of the Year in 1994 Barbaro: American Thoroughbred who decisively won the 2006 Kentucky Derby, but shattered his leg two weeks later in the 2006 Preakness Stakes, ending his racing career; underwent several operations; eventually healed, but developed laminitis and could not be saved; euthanized January 29, 2007 Barefoot: 1823 St Leger Stakes winner Basin: 2019 Hopeful Stakes winner Bast: Winner of the 2019 Del Mar Debutante Stakes, later a successful broodmare Batang Manda: Winner of the PCSO Presidential Gold Cup Battle of Midway: 2017 Breeders' Cup Dirt Mile winner Battleship (1927–1958): American thoroughbred racehorse who is the only horse to have won both the American Grand National and the Grand National steeplechase races. Bay Middleton: 1836 2000 Guineas Stakes and Epsom Derby winner. Two time leading sire in Britain and Ireland Bayakoa: Argentinian horse that won 13 Grade 1 stakes races, including the Breeders' Cup Distaff in 1989 and 1990; ranked a Top 100 American racehorse of the 20th Century Bayern: Winner of the 2014 Haskell Invitational Stakes and Breeders' Cup Classic Beadsman: 1858 Epsom Derby winner Beau Purple: One of the few horses to defeat Kelso Beautiful Pleasure: 1999 Breeders' Cup Distaff winner and American champion older mare Bee Bee Bee: 1972 Preakness Stakes winner Behave Yourself: 1921 Kentucky Derby winner Beholder: Winner of the Breeders' Cup Juvenile Fillies, two-time winner of the Breeders' Cup Distaff, as well as the first filly to win the Pacific Classic Believe: Winner of the Sprinters Stakes in 2002 and the Takamatsunomiya Kinen in 2003, Japanese best older mare or filly for 2003 Bellagio Opera: 2024 and 2025 Ōsaka Hai winner Belmar: 1895 Preakness Stakes and Belmont Stakes winner Ben Ali: 1886 Kentucky Derby winner Ben Brush: 1896 Kentucky Derby winner, American champion horse as a two-year-old and as an older-horse. Later a leading sire in North America Ben Nevis: Champion Maryland steeplechaser who won the Maryland Hunt Cup twice and the Grand National Bend Or: Very successful British Thoroughbred racehorse who won the 1880 Epsom Derby Beningbrough: 1794 St Leger Stakes winner Benny the Dip: 1997 Epsom Derby winner Bernardini: 2006 Preakness Stakes and Travers Stakes winner, later a major broodmare sire Bernborough: Australian racehorse and winner of 15 consecutive races at big weights; sold to US film producer Louis B. Mayer Best Mate: 2002, 2003 and 2004 Cheltenham Gold Cup winner; often given title 'Greatest Steeplechaser' since Arkle, and an equal to him Bet Twice: 1987 Belmont Stakes winner Better Talk Now: Five-time grade 1 stakes winner, including 2004 Breeders' Cup Turf Big Brown: 2008 Kentucky Derby and Preakness Stakes winner; first horse since Clyde Van Dusen to win the Kentucky Derby from the 20th post position Big Buck's: National Hunt horse that won the World Hurdle and Liverpool Hurdle four years in a row (2009–2012) Big Drama: 2010 Breeders' Cup Sprint winner, American champion sprint horse Big Game: 1942 2000 Guineas Stakes and Champion Stakes winner Biko Pegasus: Japanese horse that won multiple graded stakes Bimelech: 1940 Preakness Stakes and Belmont Stakes winner, American champion 2 and 3-year-old and ranked a Top 100 American racehorse of the 20th Century Birdstone: 2004 Belmont Stakes winner and successful sire Birmingham: 1830 St Leger Stakes winner Biwa Hayahide: Winner of the 1993 Kikuka-shō, 1994 Tennō Shō (Spring), and 1994 Takarazuka Kinen Black Caviar: Undefeated in 25 career starts; fifteen-time Group 1 winner Black Gold: 1924 Kentucky Derby winner, inspiration for the 1947 film Black Gold Black Hawk (Japan): British-bred Japanese-trained horse that won the Sprinters Stakes in 1999 Black Jester: 1914 Sussex Stakes and St Leger Stakes winner Black Tarquin: 1948 St James's Palace Stakes and St Leger Stakes winner Black Tie Affair: 1991 Breeders' Cup Classic winner and American Horse of the Year