Smarten Up
- Smarten Up (horse) – 1985: San Rafael Stakes
- Smarten Up (horse sired by Sharpen Up) – 1978: Temple Stakes
Smuggler
- Smuggler (horse) – b. 2002
- Smuggler (horse sired by Exbury) – 1976–78: Gordon Stakes, Henry II Stakes, Princess of Wales's Stakes, Yorkshire Cup
Snow Goose
- Snow Goose (horse) – 1947: Beldame Stakes
- Snow Goose (horse sired by Polar Falcon) – 2004: Premio Sergio Cumani
Snow Ridge
- Snow Ridge – 2001: Kentucky Cup Sprint Stakes
- Snow Ridge (horse sired by Indian Ridge) – 2003–04: Royal Lodge Stakes, 2004 WTRR, 7th 2004 Epsom Derby
Solange
- Solange (horse) – 1888: Prix de Diane
- Solange (horse sired by Sardanapale) – 1923: Prix Fille de l'Air
Solar
- Solar (horse) – 1952: International Stakes (Ireland)
- Solar (horse sired by Halo) – 1978: C. L. Weld Park Stakes, Railway Stakes (Ireland)
Solaro
- Solaro (horse) – 1977: Prix Kergorlay
- Solaro (horse sired by Galopin) – 1894: Champagne Stakes (Great Britain)
Soldat
- Soldat (horse) – b. 2008
- Soldat (horse sired by Black Sand) – 1920: Prix Saint-Roman
Soleil
- Soleil (horse) – 1965–66: Poule d'Essai des Poulains, Prix Jean-Luc Lagardère, Prix Morny, Prix de la Porte Maillot
- Soleil (horse sired by Grey Plume) – 1909: Prix des Chênes
Solerina
- Solerina – 2002–05: Barry & Sandra Kelly Memorial Novice Hurdle, Deloitte Novice Hurdle, Future Champions Novice Hurdle etc.
- Solerina (horse sired by Soldennis) – 1936: Challenge Stakes, Stewards' Cup (Great Britain)
Solford
- Solford – 1940: Champion Hurdle
- Solford (horse sired by Nijinsky) – 1983: Eclipse Stakes, Prix du Lys
Solicitor
Solitaire
- Solitaire (horse) – 1896–97: Grand Steeple-Chase de Paris, Prix La Haye Jousselin
- Solitaire (horse foaled c. 1933) – 1937: November Handicap
- Solitaire (horse sired by Ayrshire) – 1900: Champion Stakes, Queen's Vase
Solitude
- Solitude (horse) – 1960–61: Poule d'Essai des Pouliches, Prix Imprudence, Prix Morny, Prix Saint-Alary
- Solitude (horse sired by Gratitude) – 1966: Prix de Flore
Solo
- Solo (horse) – 1876: Prix Vicomtesse Vigier
- Solo (horse sired by Lampos) – 1946–48: Deutsches Derby, Grosser Preis von Berlin
- Solo (horse sired by Lord Udo) – 1983: Rheinland-Pokal
Solon
- Solon (horse) – b. 1861, see Sir Visto
- Solon (horse) – 1995: Fürstenberg-Rennen, Hessen-Pokal, Preis von Europa
- Solon (horse sired by St Damien) – 1900: Prix Daru
Songe
- Songe (horse) – 2009: Champion Hurdle Trial
- Songe (horse sired by Sundari) – 1927–29: Prix du Gros Chêne, Prix Quincey, Royal Hunt Cup
Soothsayer
- Soothsayer (horse) – b. 1808
- Soothsayer (steeplechase horse) – 1972–74: Cathcart Challenge Cup, American Champion Steeplechase Horse
Souvenir
- Souvenir (horse) – 1862–63: Prix Gladiateur, Prix du Jockey Club, Prix Royal-Oak
- Souvenir (horse sired by Maelstrom) – 1884: Mehl-Mülhens-Rennen
Spindle
- Spindle (horse) – 1855–56: July Stakes, Queen Anne Stakes
- Spindle (horse foaled in 1806) – 1808: July Stakes
Spout
- Spout (horse) – 1975: Alabama Stakes
- Spout (horse sired by Salse) – 1995–96: Fillies' Trial Stakes, John Porter Stakes, Lancashire Oaks
Springbok
- Springbok (horse) – b. 1870
- Springbok (horse sired by April the Fifth) – 1962: Hennessy Gold Cup
Springfield
- Springfield (horse) – b. 1873
- Springfield (horse sired by Lied) – 1950: Prix Jean de Chaudenay
St Albans
- St Albans (horse) – 1860: Chester Cup, Newmarket Stakes, St. Leger Stakes
- St Albans (horse) – 1883–85: Leading sire in Australia
St Helena
- St Helena (horse) – 1885: Coronation Stakes, Yorkshire Oaks
- St Helena (horse sired by St Florian) – 1900: National Stakes
St Louis
- St Louis (horse) – 1922: 2,000 Guineas Stakes
- St Louis (horse sired by Hermit) – 1880: Middle Park Stakes
St Lucia
- St. Lucia (horse) – 1958: Coronation Stakes, Lancashire Oaks
- St Lucia (horse sired by St Angelo) – 1898: Golden Jubilee Stakes
St Oswald
- St Oswald (horse) – 1905: Craven Stakes
- St Oswald (horse foaled in 1928) – 1931: Jersey Stakes
Stan
- Stan (horse) – b. 1950
- Stan (horse sired by Super Imposing) – 2008: Red Rum Handicap Chase, Silver Trophy Chase
Star
- Star (horse) – 1960–61: Critérium de Maisons-Laffitte, Prix d'Aumale, Prix Eugène Adam
- Star (horse sired by Chevening) – 1911: Hansa-Preis
Starlight
- Starlight (horse) – 1930: Prix Rothschild
- Starlight (horse sired by Castlereagh) – 1894: Royal Whip Stakes
- Starlight (horse sired by Chanticleer) – 1861: Dee Stakes
Statesman
- Statesman (horse) – 1928: List of Melbourne Cup winners
- Statesman (horse sired by Blandford) – 1934: Duke of York Handicap
Steinbeck
- Steinbeck (horse) – 1991–92: Prix Daphnis, Prix La Rochette
- Steinbeck (renamed Pure Champion) – 2010: Solonaway Stakes
Stephanotis
- Stephanotis (horse) – 1996–98: Autumn Stakes (Canada), Dominion Day Stakes, Eclipse Stakes (Canada), Ontario Derby, Prince of Wales Stakes
- Stephanotis (horse sired by Stardust) – 1956–57: Cambridgeshire Handicap, Ormonde Stakes
Sting
- Sting (horse) – b. 1921
- Sting (horse sired by Slane) – 1845: Molecomb Stakes
Stingo
- Stingo – 1930–31: King George Stakes, King's Stand Stakes
- Stingo (horse sired by Champion) – 1821: Dee Stakes
Stitch
- Stitch (horse) – 1845: Coronation Stakes
- Stitch (horse sired by Lauso) – 1968: Royal Whip Stakes, Ulster Derby
Stowaway
- Stowaway (horse) – 1893: Travers Stakes
- Stowaway (horse sired by Slip Anchor) – 1997–98: Dubai Sheema Classic, Gordon Stakes, Great Voltigeur Stakes
Straight Deal
- Straight Deal – b. 1940
- Straight Deal II – 1967: Delaware Handicap, Spinster Stakes, Top Flight Handicap
Stroller
- Stroller (horse) – b. 1950 (show jumping)
- Stroller (racehorse) – 1954: Supreme Novices' Hurdle
Stromboli
- Stromboli (horse) – 1914: Manhattan Handicap, Saranac Stakes
- Stromboli (horse sired by Stratege) – 1977: Prix La Flèche
Suavita
- Suavita – 1845: Prix de Diane
- Suavita (horse sired by St Victrix) – 1919: Prix Vanteaux
Succes
- Succes – 1874: Prix Hocquart
- Succes (horse sired by Antler) – 1961: Prix du Pin
Sudan
- Sudan (horse) – 2007–08: Gran Premio di Milano, 2008 WTR
- Sudan (horse sired by Nizam) – 1962: Deutsches St. Leger, Fürstenberg-Rennen
Sultan
- Sultan (horse) – b. 1816
- Sultan (horse foaled c. 1862) – 1866: Stewards' Cup (Great Britain)
- Sultan (horse sired by Crescent) – 1855: Cambridgeshire Handicap
Sundry
- Sundry (horse) – 1927: Queen Anne Stakes
- Sundry (horse sired by Nearco) – 1954: Falmouth Stakes
Sunfire
- Sunfire (horse) – b. 1925
- Sunfire (horse sired by Sundridge) – 1915: Greenham Stakes
Sunflower
- Sunflower (horse) – 1912: Prix de la Salamandre
- Sunflower II – 1912: Diamond Jubilee Stakes
Sunny Boy
- Sunny Boy (horse) – 1948–54: Prix Maurice de Nieuil, Leading sire in France
- Sunny Boy (horse foaled in 1930) – 1932: Prix Saint-Roman
Sunrise
- Sunrise (horse) – 2006: Ind. fr. dressage at Equestrian Games, Ind. sp. dressage at Equestrian Games
- Sunrise (racehorse) – 1885: Richmond Stakes
Superstition
- Superstition (horse) – 1962: Lockinge Stakes
- Superstition (horse sired by Kutub) – 2010: 2nd Baden Racing Stuten-Preis
Suzerain
- Suzerain (horse) – 1868: Prix du Jockey Club, Prix Lupin
- Suzerain (horse foaled c. 1925) – 1929: Prix du Pin
- Suzerain (horse sired by Son-in-Law) – 1938: Yorkshire Cup
Sweet Revenge
- Sweet Revenge (horse) – 1980: Alcibiades Stakes, Schuylerville Stakes
- Sweet Revenge (horse sired by Compensation) – 1971–72: King's Stand Stakes, Prix de l'Abbaye de Longchamp, Prix Maurice de Gheest
Sweetheart
- Sweetheart (horse) – 2010: Warfield Mares' Hurdle
- Sweetheart (horse foaled in 1847) – 1849: July Stakes
Swift and Sure
- Swift and Sure – 1985: Hamburger Stuten-Preis
- Swift and Sure (horse sired by Swynford) – 1926: Chester Vase
Sycomore
- Sycomore (horse) – 1885–86: Prix du Jockey Club, Prix Yacowlef
- Sycomore II – 1951: Northumberland Plate
Sylph
- Sylph (horse) – 1983: Princess Royal Stakes
- Sylph (horse sired by Solon) – 1883: Irish Derby
Sylphide
- Sylphide (horse) – 1947: Prix Penelope
- Sylphide (horse sired by Supreme Court) – 1957: Falmouth Stakes
Tactic
- Tactic (horse) – 2010: Curragh Cup, 2010 WTR
- Tactic (horse sired by Relic) – 1954: Prix La Rochette, Zukunfts-Rennen
Take Control
- Take Control (horse) – b. 2007
- Take Control (horse sired by Roselier) – 2002: Scottish Grand National
Talisman
- Talisman (horse) – b. 1941 (Selle Français), see Voltaire (horse)
- Talisman (racehorse) – 1884: Jersey Stakes
Talma
- Talma (horse) – 1951: Cumberland Lodge Stakes, St. Leger Stakes
- Talma (horse sired by Mon Talisman) – 1939: Prix Jean de Chaudenay
Tamerlane
- Tamerlane (horse) – 1973: Yonkers Trot
- Tamerlane (horse sired by Persian Gulf) – 1954–55: July Stakes, Norfolk Stakes (Great Britain), St. James's Palace Stakes
Tangle
- Tangle (horse) – 1906: American Champion Three-Year-Old Filly
- Tangle (horse sired by Mustang) – 1950: King's Stand Stakes
Tannenberg
- Tannenberg (horse) – 1978–79: Hungerford Stakes, Prix Perth
- Tannenberg (horse sired by Neckar) – 1972–74: Deutsches St. Leger, Grosser Preis von Berlin, Preis des Winterfavoriten
Taos
- Taos (horse) – 1998: Display Stakes
- Taos (horse sired by Sadler's Wells) – 1992: Autumn Stakes (Great Britain)
Tara
- Tara (horse) – 1955: International Stakes (Ireland)
- Tara (horse sired by Teddy) – 1935: Prix Quincey
Tarantella
- Tarantella (horse) – b. 1830
- Tarantella (horse sired by Melton) – 1902–03: Premio Presidente della Repubblica
Tarascon
- Tarascon (horse) – 1990: Southwest Stakes
- Tarascon (horse sired by Tirol) – 1997–98: Irish 1,000 Guineas, Moyglare Stud Stakes
Taraval
Tartar
- Tartar (horse) – b. 1743, see Florizel, Herod (horse), Highflyer (horse), Matchem, Partner (horse), Sir Peter Teazle etc.
- Tartar (horse, foaled 1789) – b. 1789
- Tartar (horse sired by Digby Grand) – 1883: Deutsches Derby, Union-Rennen
Tattoo
- Tattoo (horse) – 1927: Craven Stakes
- Tattoo (horse sired by Rataplan) – 1860: Portland Handicap
Taurus
- Taurus (horse) – 1841: Leading sire in Great Britain and Ireland
- Taurus (horse sired by Scottish Chief) – 1882: Deutsches Derby, Union-Rennen
Teal
- Teal (horse) – 1952: List of Grand National winners, List of Grand National first four placings
- Teal (horse sired by Foveros) – 1995: Durban July Handicap
Telescope
- Telescope (horse) – 1878: Portland Handicap
- Telescope (horse sired by Tyrant) – 1896: November Handicap
Tempest
- Tempest (horse) – 1957: Investec Derby Trial
- Tempest II – 1937: Queen Anne Stakes
Terror
- Terror (horse) – b. 1866, see Canadian Horse Racing Hall of Fame
- Terror (horse sired by Magistrate) – 1828: Dee Stakes
The Admiral
- The Admiral (horse) – 1973: Henry II Stakes
- The Admiral (horse sired by Sheet Anchor) – 1848: Stewards' Cup (Great Britain)
The Bard
- The Bard (American horse) – b. 1883
- The Bard (GB horse) – b. 1883
- The Bard (horse) – redirects to The Bard (American horse)
The Baron
- The Baron (horse) – b. 1842
- The Baron (horse sired by Xenophon) – 1887: Craven Stakes
The Colonel
- The Colonel (horse) – b. 1825
- The Colonel (steeplechase horse) – 1869–70: List of Grand National winners, List of Grand National first four placings
The Doctor
- The Doctor (horse) – 1870: List of Grand National first four placings
- The Doctor (horse foaled c. 1836) – 1840: Ayr Gold Cup
The Duchess
- The Duchess (horse) – b. 1813
- The Duchess (horse sired by St Albans) – 1867: Nassau Stakes
The Duke
- The Duke (horse) – 2005–07: Hong Kong Mile, 2005–06 WTRR, 2006–07 WTRR
- The Duke (horse sired by Stockwell) – 1866: Goodwood Cup
- The Duke (racehorse) – b. 1829
The Gunner
- The Gunner – 1904: List of Grand National first four placings
- The Gunner (horse sired by Crater) – 1875: Lincoln Handicap
The Lawyer
- The Lawyer (horse) – 1860–61: Railway Stakes (Ireland), Royal Whip Stakes
- The Lawyer III – 1908: List of Grand National first four placings
The Leopard
- The Leopard (horse) – 2007: Pilgrim Stakes
- The Leopard (horse sired by Tetratema) – 1930: Cheveley Park Stakes
The Marquis
- The Marquis – 1861–62: 2,000 Guineas Stakes, Champagne Stakes (Great Britain), St. Leger Stakes
- The Marquis (horse sired by Uncas) – 1850: Anglesey Stakes
The Page
- The Page – 1845: 1845 Grand National (refused)
- The Page (horse sired by Winkfield) – 1905: Ebor Handicap
The Recorder
- The Recorder (horse) – 1930–31: Princess of Wales's Stakes, Queen Anne Stakes
- The Recorder (horse foaled c. 1838) – 1842: Ayr Gold Cup
The Scout
- The Scout (horse) – 1987: Prix La Force
- The Scout (horse sired by The Ranger) – 1869: Irish Derby, Royal Whip Stakes
- The Scout II – 1930–31: Newmarket Stakes, Yorkshire Cup
The Shah
The Spy
The Switcher
- The Switcher – 1845: Royal Whip Stakes
- The Switcher – 1848: 1848 Grand National (fell)
Thorn
- Thorn (horse) – 1897: Kentucky Futurity / 1972: El Encino Stakes
- Thorn (horse sired by King of Trumps) – 1872–73: Gimcrack Stakes, Queen's Vase
- Thorn (horse sired by Sweetbriar) – 1789: Craven Stakes
Thornfield
- Thornfield – b. 1994
- Thornfield (steeplechase horse) – 1881: List of Grand National first four placings
Three Cheers
- Three Cheers – 1997: Bahrain Trophy, Prix de Lutèce
- Three Cheers (horse sired by Stalino) – 1951: Cesarewitch Handicap
Thrush
- Thrush (horse) – horse infection
- Thrush (racehorse) – b. 1902
Thumbs Up
- Thumbs Up (horse) – 1945: Santa Anita Handicap
- Thumbs Up (horse sired by Fidel) – 1993: Vincent O'Brien County Handicap Hurdle
- Thumbs Up (horse sired by Shinko King) – 2009–10: 2009 WTR, 2010 WTR
Thunder
- Thunder (horse) – List of historical horses
- Thunder (horse sired by Thunderbolt) – 1874–76: Queen Anne Stakes, Queen's Vase
Tiepolo
Tiger Hill
- Tiger Hill (horse) – 1998–99: Bavarian Classic, Bayerisches Zuchtrennen, Gerling-Preis, Grosser Preis von Baden, Mehl-Mülhens-Rennen etc.
- Tiger Hill (horse sired by Golden Myth) – 1927: Gordon Stakes
Tim Whiffler
- Tim Whiffler – 1867: AJC Metropolitan Handicap, List of Melbourne Cup winners
- Tim Whiffler (horse sired by Van Galen) – 1862: Chester Cup, Doncaster Cup, Goodwood Cup, Queen's Vase
Tintagel
- Tintagel (horse) – 1935: American Champion Two-Year-Old Colt, Belmont Futurity Stakes
- Tintagel (horse sired by Blakeney) – 1979: Prix Corrida, Prix Fille de l'Air
- Tintagel II – 1969–70: Ebor Handicap, November Handicap
Tipperary Boy
- Tipperary Boy – 1849–50: 1849 Grand National (non-finisher), List of Grand National first four placings
- Tipperary Boy – 1899–1902: Galway Plate, Irish Grand National
Tippler
- Tippler (horse) – 1859: Prix Gladiateur, Prix Vicomtesse Vigier
- Tippler (horse sired by Tumbler) – 1863: Queen Anne Stakes
Tiresias
- Tiresias (horse) – b. 1816
- Tiresias (horse foaled in 1927) – 1930: Prix Berteux
Tomahawk
- Tomahawk (horse) – 1993: Lanzarote Hurdle
- Tomahawk (horse foaled c. 1955) – 1959: Prix Maurice de Gheest
- Tomahawk (horse sired by Thormanby) – 1874: Lincoln Handicap
Tontine
- Tontine (horse) – b. 1822
- Tontine (horse sired by Tetotum) – 1840: Prix du Jockey Club
Toro
- Toro (horse) – 1928: American Derby, Latonia Derby
- Toro (horse sired by Tudor Minstrel) – 1957: Coronation Stakes, Poule d'Essai des Pouliches
Toronado
- Toronado – fictional horse
- Toronado (racehorse) – 2012–13: Champagne Stakes (Great Britain), Craven Stakes, Winkfield Stakes
Torpid
- Torpid (horse) – 1957: Harness Horse of the Year, Little Brown Jug (horse racing)
- Torpid (horse sired by Match) – 1968–70: Jockey Club Stakes, John Porter Stakes, White Rose Stakes
Tourist
- Tourist (horse) – 1928: Princess of Wales's Stakes
- Tourist (horse sired by Daniel O'Rourke) – 1863: Royal Whip Stakes
Tournament
- Tournament (horse) – 1890: American Champion Three-Year-Old Male Horse
- Tournament (horse sired by Touchstone) – 1857: Stewards' Cup (Great Britain)
Tournesol
- Tournesol (horse) – 1926–39: Princess of Wales's Stakes, Leading sire in Japan
- Tournesol (horse sired by Le Destrier) – 1892: Prix Eclipse
Town Crier
- Town Crier (horse) – 1969: Queen Anne Stakes
- Town Crier (horse sired by Apelle) – 1930: Sagaro Stakes
Trafalgar
- Trafalgar (horse) – 1909–12: AJC Randwick Plate, see Repeat winners of horse races
- Trafalgar (horse sired by Pardal) – 1963: Princess of Wales's Stakes
Traghetto
- Traghetto – 1945: Derby Italiano, Gran Premio d'Italia
- Traghetto (horse foaled c. 1929) – 1933: Prix Quincey
Tranquil
- Tranquil (horse) – 1923: 1,000 Guineas Stakes, Jockey Club Cup, St. Leger Stakes
- Tranquil (horse sired by Gris Perle) – 1938: Prix Daphnis
Tresor
- Tresor (horse) – 2008: Equestrian at the 2008 Summer Olympics – Individual jumping
- Tresor (racehorse) – 1940: Prix Greffulhe
Trianon
- Trianon (horse) – 1977–78: Dr. Busch-Memorial, Herzog von Ratibor-Rennen
- Trianon III – 1914: List of Grand National first four placings
Trident
- Trident (horse) – 1886: Australian Derby
- Trident (horse sired by Ocean Wave) – 1899: Dee Stakes
Tristan
- Tristan (horse) – b. 1878
- Tristan (horse sired by Soapstone) – 1878: Herzog von Ratibor-Rennen
Triumph
- Triumph (horse) – 1923: Goodwood Cup, Princess of Wales's Stakes
- Triumph (horse sired by King Herod) – 1780: Craven Stakes
Trophonius
- Trophonius (horse) – b. 1808
- Trophonius (horse sired by Beningbrough) – 1810: Doncaster Cup
Troubadour
- Troubadour (horse) – b. 1882
- Troubadour (horse sired by Danehill) – 2004: Solonaway Stakes
- Troubadour (horse sired by St Amant) – 1914: Cesarewitch Handicap
Trouville
- Trouville (horse) – 1894: List of Grand National first four placings
- Trouville (horse sired by Dogat) – 1955: Golden Jubilee Stakes
True Blue
- True Blue (horse) – 1839: List of Grand National first four placings
- True Blue II – 1890: Queen Anne Stakes
Tullamore
- Tullamore (horse) – 1919–20: Grand Prix de Deauville, Prix Kergorlay, Prix du Prince d'Orange
- Tullamore (horse sired by Theatrical) – 2009: 16th 2009 Prix de l'Arc de Triomphe
Turco
- Turco (horse) – 1869: Prix du Gros Chêne
- Turco II – 1950–51: Dewhurst Stakes, Solario Stakes, St. James's Palace Stakes
Turkoman
- Turkoman (horse) – b. 1982
- Turkoman (horse sired by Patch) – 1982: November Handicap
Turquoise
- Turquoise (horse) – b. 1825
- Turquoise (horse foaled in 1941) – 1943: Critérium de Maisons-Laffitte
Tycoon
- Tycoon (horse) – 2004–05: 2004 WTRR, 2004–05 WTRR
- Tycoon (horse sired by Tamerlane) – 1965: Prix Perth
Tyrant
- Tyrant (horse) – b. 1799
- Tyrant (horse sired by Beauclerc) – 1890: Chester Cup, Doncaster Cup, Queen's Vase
- Tyrant (horse sired by Great Tom) – 1885: Belmont Stakes
Ultimus
- Ultimus (horse) – b. 1906, see Bold Venture (horse), High Time (horse)
- Ultimus (horse sired by William the Third) – 1911: November Handicap
Umpire
- Umpire (horse) – 1863: King's Stand Stakes
- Umpire (horse sired by Tom King) – 1876: Irish Derby
Uncas
- Uncas (horse) – b. 1876, see Sheepshead Bay Race Track
- Uncas (horse sired by Stockwell) – 1867–68: Anglesey Stakes, Dee Stakes, Railway Stakes (Ireland)
Ungaro
- Ungaro (horse) – 1997–99: Deutsches St. Leger, Frühjahrs Dreijährigen-Preis, Gran Premio di Milano, Grosser Preis von Berlin, Rheinland-Pokal
- Ungaro (horse sired by Epervier Bleu) – 2006: Feltham Novices' Chase, Heroes Handicap Hurdle
Union
- Union (horse) – 1909: Prix Greffulhe, Prix de Diane
- Union (horse) – 1933: Belmont Stakes Top three finishers
Union Jack
- Union Jack (horse) – 1938: Northumberland Plate
- Union Jack (horse foaled in 1861) – 1863: Railway Stakes (Ireland)
- Union Jack (horse sired by Gladiator) – 1859: Prix Lupin
Upset
- Upset (horse) – 1919–20: Latonia Derby, Sanford Stakes
- Upset (horse sired by See Saw) – 1887: Stewards' Cup (Great Britain)
Uriel
- Uriel (horse) – 1849: St. James's Palace Stakes
- Uriel (horse sired by Macdonald II) – 1909: Prix Jean-Luc Lagardère, Prix Yacowlef
- Uriel (horse sired by St Nicholas) – 1853: Union-Rennen
Utrecht
- Utrecht (horse) – 2007: Prix Chloe
- Utrecht (horse sired by King Lud) – 1885: Prix de Condé
Utrillo
- Utrillo (horse) – 1961–63: Cesarewitch Handicap, Northumberland Plate
- Utrillo (horse sired by Orator) – 1958: Gerling-Preis
Vacarme
- Vacarme – 1958–59: Jockey Club Cup, Prix Vicomtesse Vigier, Sagaro Stakes
- Vacarme (horse sired by Lyphard) – 1983: Mill Reef Stakes, Richmond Stakes (disq.)
Vagabond
- Vagabond (horse) – 1945–46: Prix de la Forêt, Prix de Meautry, Prix de Seine-et-Oise
- Vagabond (horse sired by Musjid) – 1869: Queen Anne Stakes
Valentine
- Valentine (horse) – 1840: List of Grand National first four placings
- Valentine (horse sired by Alycidon) – 1961: Horris Hill Stakes
Valentino
- Valentino (horse) – 2004–05: Prix André Baboin, Prix Edmond Blanc, Prix Perth
- Valentino (horse sired by Suffolk) – 1880–82: Golden Jubilee Stakes, Queen Anne Stakes
Valerius
- Valerius (horse) – 1935–36: Chester Vase, Yorkshire Cup
- Valerius (horse sired by Pardon) – 1921: Gran Premio di Milano
- Valerius (horse sired by The Palmer) – 1882: Goldene Peitsche
Valley Victory
- Valley Victory – 1989: Yonkers Trot
- Valley Victory (horse sired by Welsh Chanter) – 1985: Killavullan Stakes
Valmy
- Valmy (horse) – 1968: Prix Hocquart
- Valmy (horse sired by Massena) – 1912: St. Leger Italiano
Valparaiso
- Valparaiso (horse) – 1896–98: Prix du Gros Chêne, Prix Jean Prat, Prix de la Salamandre
- Valparaiso (horse sired by Asterus) – 1934: Herzog von Ratibor-Rennen
Vanguard
- Vanguard (American horse) – 1882: Preakness Stakes
- Vanguard (British horse) – b. 1835
- Vanguard (horse) – redirects to Vanguard (British horse)
Vasco de Gama
- Vasco de Gama (horse) – 1966: Prix Jean de Chaudenay, Prix Royal-Oak
- Vasco de Gama (horse sired by Souverain) – 1955: Premio Parioli
Vedette
- Vedette (horse) – b. 1854
- Vedette (standardbred horse) – 1951: Inter Dominion Pacing Championship
Vela
- Vela (horse) – 1969: Prix Marcel Boussac
- Vela (horse sired by Tornado) – 1949: Prix du Conseil de Paris
Velasquez
- Velasquez (horse) – 1896–98: Champagne Stakes (Great Britain), Champion Stakes, Eclipse Stakes, Princess of Wales's Stakes etc.
- Velasquez (horse sired by Fricandeau) – 1899: Prix Chaudenay
Velocity
- Velocity (horse) – 1941: Caulfield Cup
- Velocity (horse sired by Speed) – 1905–07: Cambridgeshire Handicap, Doncaster Cup
Vengeance
- Vengeance (horse) – 1890: Caulfield Cup
- Vengeance (horse sired by Chanticleer) – 1856: Cesarewitch Handicap
Vent du Nord
- Vent du Nord – 1967–69: Canadian International Stakes, Prix La Rochette
- Vent du Nord (horse foaled c. 1934) – 1938: Prix du Pin
Veracity
- Veracity (horse) – 2008–09: Jockey Club Cup, 2009 WTR
- Veracity (horse sired by Wisdom) – 1888: Cambridgeshire Handicap, Lincoln Handicap
Verglas
- Verglas (horse) – 1996: Coventry Stakes
- Verglas (horse foaled in 1965) – 1967: Prix des Chênes
Vermouth
- Vermouth (horse) – 1916–17: List of Grand National winners, List of Grand National first four placings
- Vermouth (horse sired by The Nabob) – 1864: Grand Prix de Paris, Grosser Preis von Baden
Veronese
- Veronese (horse) – 1901: Prince of Wales's Stakes
- Veronese (horse sired by Le Haar) – 1963–64: Gran Premio del Jockey Club, Gran Premio di Milano, Premio Presidente della Repubblica, Premio Roma
Vertigineux
- Vertigineux – b. 1995
- Vertigineux (horse sired by Nombre Premier) – 2008–10: Prix du Muguet, Prix Perth, Prix de la Porte Maillot, 2010 WTR
Verveine
- Verveine – 1991–93: Prix du Calvados, Prix de l'Opéra, 9th 1992 Prix de l'Arc de Triomphe
- Verveine (horse sired by Mourle) – 1888: Prix Vanteaux
Victorious
- Victorious (horse) – 1891: Breeders' Stakes, Queen's Plate
- Victorious (horse) – 1982: Saratoga Special Stakes
- Victorious (horse sired by Florizel) – 1906: Gordon Stakes
Vigo
- Vigo (horse) – 1955–57: July Cup, Seaton Delaval Stakes
- Vigo (horse foaled in 1856) – 1860: Lincoln Handicap
Vinaigrette
- Vinaigrette (horse) – 1875: Kentucky Oaks
- Vinaigrette (horse sired by Patricien) – 1877: Grand Prix de Deauville
Violette
- Violette (horse) – 2005: Firth of Clyde Stakes
- Violette (horse sired by Ion) – 1860: Prix Daru
Viscount
- Viscount (horse) – 2000–01: Australian Champion Two Year Old
- Viscount (horse sired by Stamford) – 1813: Doncaster Cup
Volante
- Volante (horse) – 1885–86: American Derby, Champion Stakes (United States)
- Volante (horse sired by Highflyer) – 1792: Epsom Oaks
- Volante (horse sired by Rowlston) – 1836: Prix Gladiateur
Volga
- Volga (horse) – 1916: Kentucky Futurity
- Volga (horse) – 2001–03: E. P. Taylor Stakes, Matchmaker Stakes, Prix de Royaumont
Voltaire
- Voltaire (horse) – b. 1979 (show jumping)
- Voltaire (horse foaled c. 1949) – 1953: Prix du Chemin de Fer du Nord
- Voltaire (racehorse) – b. 1826
Volturno
- Volturno (horse) – b. 1968 (eventing), see Donnerhall
- Volturno (racehorse) – 1874: Jersey Stakes
Votre Altesse
- Votre Altesse – 1980–81: Prix de Flore, Prix des Réservoirs
- Votre Altesse (horse sired by Palais Royal) – 1935: Prix Berteux
Vulcan
- Vulcan (horse) – 1871: Lincoln Handicap
- Vulcan (horse sired by Verulam) – 1841: Cambridgeshire Handicap
Waidmannsheil
- Waidmannsheil – 1960: Rheinland-Pokal
- Waidmannsheil (horse sired by Savernake) – 1879: Zukunfts-Rennen
Wall Street
- Wall Street (horse) – 1996: Cumberland Lodge Stakes
- Wall Street (horse sired by Montjeu) – 2010: 2010 WTR
Wallace
- Wallace (horse) – 1915–16: Leading sire in Australia
- Wallace (horse sired by Royal Academy) – 1999: Summer Mile Stakes
Waltz
- Waltz (horse) – 1959: Dwyer Stakes, Jersey Derby
- Waltz (horse sired by Alcide) – 1976: Union-Rennen
Walzertraum
- Walzertraum – 2008: Bavarian Classic
- Walzertraum (horse sired by Prunus) – 1928: Herzog von Ratibor-Rennen, Zukunfts-Rennen
Wanderer
- Wanderer (horse) – 1855: List of Grand National winners, List of Grand National first four placings
- Wanderer (horse sired by Tambourine) – 1972: Prix d'Hédouville
War Eagle
- War Eagle (horse) – 1959: Highlander Stakes, King Edward Stakes, Seaway Stakes
- War Eagle (horse sired by Lanercost) – 1847–48: Doncaster Cup, Queen Anne Stakes
Warm Spell
- Warm Spell – b. 1988
- Warm Spell (horse sired by Northern State) – 1996: Lanzarote Hurdle
Warren
- Warren (horse) – 2004: Olympics – Individual jumping, Olympics – Team jumping
- Warren (racehorse) – 1968: International Stakes (Ireland)
Warrior
- Warrior (horse) – 1869: List of Melbourne Cup winners
- Warrior (horse foaled c. 1876) – 1880: Wokingham Stakes
- Warrior (horse sired by Portlaw) – 1942: Prix de Fontainebleau
Washington
- Washington (horse) – b. 1819, see Timoleon (horse)
- Washington (horse sired by Donovan) – 1897: Prix Morny
- Washington (horse sired by Golden Cloud) – 1966: Greenlands Stakes
Weathercock
- Weathercock (horse) – 1857–58: List of Grand National first four placings
- Weathercock (horse sired by Gallinule) – 1906: Richmond Stakes
Weathervane
- Weathervane (horse) – 1922–23: Greenham Stakes, Royal Hunt Cup
- Weathervane (horse sired by Son-in-Law) – 1937: Ebor Handicap
Wenlock
Wentworth
- Wentworth (horse) – 2012: Haynes, Hanson and Clark Conditions Stakes
- Wentworth (horse sired by Bay Middleton) – 1856: Newmarket Stakes
Westminster
- Westminster (horse) – 1989: Railway Stakes (New Zealand)
- Westminster (steeplechase horse) – 1857: List of Grand National first four placings
White Star
- White Star (horse) – 1911: Champagne Stakes (Great Britain), Dewhurst Stakes, July Stakes, Molecomb Stakes
- White Star (horse sired by Venture) – 1965: Prix de Guiche
Whitefoot
- Whitefoot (horse) – 2000: Fillies' Trial Stakes
- Whitefoot (horse sired by Relko) – 1970: Musidora Stakes
- Whitefoot (horse sired by Young Blacklock) – 1833: Anglesey Stakes
Whittier
- Whittier (horse) – 1922–25: Caulfield Cup
- Whittier (horse foaled c. 1890) – 1894: Challenge Stakes
Widerhall
- Widerhall – 1975: Bénazet-Rennen
- Widerhall (horse sired by Prunus) – 1932: Grosser Preis von Baden, Mehl-Mülhens-Rennen
Wiener Walzer
- Wiener Walzer (horse) – 2009: Deutsches Derby, Rheinland-Pokal, Union-Rennen, 2009 WTR, 2010 WTR
- Wiener Walzer (horse sired by Oleander) – 1936: Oettingen-Rennen
- Wiener Walzer (horse sired by Olymp) – 1959–60: Dr. Busch-Memorial, Mehl-Mülhens-Rennen, Preis des Winterfavoriten
Windsor Castle
- Windsor Castle (horse) – 2000: Remsen Stakes
- Windsor Castle (horse sired by Generous) – 1997: Northumberland Plate, Queen's Vase
Windy City
- Windy City (horse) – b. 1949
- Windy City (horse sired by Upset) – 1929: American Derby
Wirbel
- Wirbel (horse) – 1966: Flieger Trophy, Silberne Peitsche
- Wirbel (horse sired by Caius) – 1918: Hansa-Preis
Wise Counsellor
- Wise Counsellor – 1923: American Champion Two-Year-Old Colt, Kentucky Jockey Club Stakes
- Wise Counsellor (horse sired by Alleged) – 1986: Desmond Stakes, 17th 1986 Epsom Derby
Woodburn
- Woodburn (horse) – United States at the 2008 Summer Olympics
- Woodburn (horse sired by Bois Roussel) – 1948–49: Cesarewitch Handicap, Yorkshire Cup
Woodman
- Woodman (horse) – b. 1983
- Woodman (horse sired by Red Hart) – 1864: Royal Whip Stakes
Woolley
- Woolley (horse) – 1969: Bunbury Cup
- Woolley (horse foaled c. 1903) – 1907: Portland Handicap
Xenophon
- Xenophon (horse) – 2003: Boylesports.com Hurdle, Coral Cup
- Xenophon (horse sired by Le Sancy) – 1904: Prix Daniel Wildenstein
Yawl
- Yawl (horse) – 1942: King Edward Stakes
- Yawl (horse sired by Rainbow Quest) – 1992: Oh So Sharp Stakes, Rockfel Stakes
Yellowstone
- Yellowstone (horse) – 2007: Gordon Stakes, 8th 2007 Epsom Derby, 11th 2007 Prix de l'Arc de Triomphe, 2007 WTRR
- Yellowstone (horse sired by Colorado) – 1932: Dee Stakes
Yvrande
- Yvrande – 1883–84: Poule d'Essai des Pouliches, Prix La Rochette
- Yvrande (horse sired by Sky High) – 1954: Prix Minerve
Zaidee
Zanga
- Zanga – 1837: BD 1837 Grand Liverpool Steeplechase
- Zanga (horse foaled in 1786) – 1789: St. Leger Stakes (disq.)
Zany
- Zany (horse) – b. 2005, redirects to Tin Cup Chalice
- Zany (horse sired by Morisco) – 1830: July Stakes
Zanzibar
- Zanzibar (horse) – 1888: Nassau Stakes, Sussex Stakes
- Zanzibar (horse sired by In the Wings) – 2001: Oaks d'Italia
- Zanzibar (horse sired by King's Bench) – 1960: Diadem Stakes
Zenith
- Zenith (horse) – 1912: Prix Hocquart
- Zenith (horse sired by Archer) – 1905: Deutsches St. Leger
Zenobia
Zeus
- Zeus (horse) – 1911: King Edward Stakes
- Zeus II – 1930: La Coupe
Zipping
- Zipping (horse) – b. 2001
- Zipping (horse sired by Zafonic) – 2001–02: Prix Robert Papin, Prix de Ris-Orangis
Zoffany
- Zoffany (horse) – b. 1980
- Zoffany (horse sired by Dansili) – 2010: Golden Fleece Stakes, Phoenix Stakes, Tyros Stakes
Zucchero
- Zucchero (horse) – 1951–53: Investec Derby Trial, Coronation Cup, Princess of Wales's Stakes
- Zucchero (horse sired by Dilum) – 2002: Lincoln Handicap