The term "Polo Pony" is a traditional designation that has become a misnomer in the modern era. Originally, polo mounts were indeed ponies, with height limits of 13.2 hands in the sport's early days and 14.2 hands before 1919. When height restrictions were eliminated, Thoroughbreds and larger horses became predominant, yet the traditional name persisted. Today's polo ponies are full-sized horses typically standing 15-16 hands, with the "pony" designation honoring the sport's heritage rather than describing actual size.
The Argentine Polo Pony, or Polo Argentino, represents the closest thing to a standardized breed within polo. The AsociaciΓ³n Argentina de Criadores de Caballos de Polo (Argentine Association of Polo Horse Breeders), established in 1984, maintains a registry for these horses. Argentina's dominance in polo, both in player development and horse breeding, has made Argentine Polo Ponies the gold standard worldwide, commanding prices that can exceed $100,000 for top competition horses.
In other polo-playing nations, polo ponies may come from various breeds and crosses. The United States commonly uses Thoroughbred-Quarter Horse crosses, while Australian polo favors Australian Stock Horses. Britain has historically used Thoroughbreds and various crosses. Regardless of origin, all polo ponies share the essential characteristics demanded by the sport: speed, agility, courage, stamina, and the temperament to perform under the intense pressure of competition. The term "polo pony" thus describes a type of horse selected and trained for polo rather than a specific breed.

