The polo pony: a horse by any other name.

Why a horse is called a pony

A modern polo pony is a full-sized horse. The word survives from the early rules, which capped how tall a polo mount could be. The HPA's own introduction to polo says the term comes from that original limit, which was dropped after the First World War. Wikipedia adds that "pony" now describes a type, quick and handy, rather than a size.

Today neither of the main rulebooks sets a height. Under the HPA's 2026 rules (Rule 3a), ponies of any height may be played. Under the USPA's 2024 Outdoor Rules (Rule 5a), a mount is a horse or pony of any breed or size. The USPA revises its rules each year, so check the current book.

How big are polo ponies now?

Sources give slightly different ranges.

A La Nacion guide to the Campo Argentino de Polo (2001, updated 2020) puts the average Argentine Open pony at about 450 kg, with a top speed of about 60 km/h, and says about 80 percent are mares. That guide is the only source we have for those figures and they could not be confirmed elsewhere.

The old height limit, and why its history is disputed

Everyone agrees that polo once had a height limit and that it has gone. Beyond that, the sources give different heights and different years. We show each version with who gives it, because none of them could be settled from a primary historical rulebook.

So the raise to 14.2 hands is dated 1895 by the HPA and Royal Horse, and 1899 in the Horse & Hound summary. The end of the limit is given as 1916, 1919, around 1920, or simply after the First World War. No primary source was found for when the limit ended in the United States.

The same 14.2 figure turns up in breeding. The National Pony Society says it began in 1893 as the Polo Pony Stud Book Society, formed in a tent at the Royal Agricultural Society's show at Chester, with a rule that its stallions and mares must not exceed 14.2 hh. It published a detailed document on measuring polo ponies in 1907 and renamed itself the National Pony Society in 1913. Foxhams Stud notes that a UK show class for polo and riding pony geldings still uses a 14.2 limit, confirmed by a vet or a "Hurlingham Certificate". That is a showing rule, not a rule for playing polo.

The first polo ponies really were small

• Manipur. Scroll.in describes the Manipuri pony as one of India's five recognised horse breeds, often called the only living original polo pony, usually 11 to 13 hands. Sahapedia says it probably descends from the Mongolian pony. Royal Horse says the Manipur ponies used by tea planters at Silchar were generally no taller than about 1.22 m.
• England, 1869. The Field reports that about 17 ponies of roughly 12.2 hands were brought from Ireland for the early games, after cavalry chargers proved unsuitable.
• United States, 1876. The Museum of Polo says James Gordon Bennett Jr. had ponies sent from Texas when he set polo up in New York.

The Manipuri pony is now scarce. Scroll.in reports that its numbers fell from 1,898 in the 2003 livestock census to 1,101 in 2012, and that the latest breed report counts 994 in India, 918 of them in Manipur. Manipur adopted a pony conservation policy in 2016, which Scroll describes as weakly implemented. The Manipur history page covers the game the British found there.

Breeds

Polo has no breed rule, and the HPA and USPA rules quoted above accept any breed. What plays in practice:

• The HPA names Thoroughbreds, Quarter Horses and the Argentine Polo Pony (Polo Argentino), or crosses of them, as the common breeds. It also says many retired racehorses find a second career in polo.
• Wikipedia lists Himalayan mountain ponies, Manipur ponies, Arabians, and Thoroughbreds and their crosses. It says Thoroughbreds are often crossed with Quarter Horses in the US, Thoroughbred and Criollo crosses have become popular, and Australian Stock Horses are the most common in Australian polo.
• EBSCO says early players used only Thoroughbreds but mixed breeds soon became common, and that the best ponies often come from Argentina, the US Southwest and the Rocky Mountain region.

The Polo Argentino has its own page: the Argentine polo pony.

Ages and working life

Wikipedia says polo horses begin training at about 3, mature at about 5, peak at about 6 to 7 and may play until 18 to 20. The Museum of Polo says most playing ponies are 5 to 15 years old. The HPA says many play into their late teens or early twenties. The La Nacion guide (single, older source) says Argentine ponies play from about 4, or 5 to 6 at Palermo, to about 17. The rules add their own ages: the HPA's 2026 rules advise a vet heart and eye test each season for ponies aged 16 or over, and the Pony Club's 2026 rules require ponies to be at least 4. The welfare rules page has those limits in full.

How a polo pony looks on match day

You can usually tell a playing pony by its turnout. The St. Moritz Snow Polo programme says manes are hogged (clipped very short) so sticks, reins and hands do not tangle, and tails are plaited and taped up so sticks do not catch. The South African Polo Association gives the same reasons. Under the HPA's 2026 rules (Rule 3c), ponies must wear bandages or boots on all four legs and have their tails put up. The pony leg protection page covers the rules on boots and bandages body by body.

Ponies win prizes too

Many tournaments name a best playing pony alongside the most valuable player. Recent examples from the research:

• 2025 Gold Cup for the British Open, Cowdray Park: Mia Cambiaso's mare DS Altamira (Your Horse).
• 2026 U.S. Open Polo Championship: Open Texas (USPA).
• 2026 U.S. Open Women's Polo Championship: Latia Bancada, played by Milly Hine (Global Polo).
• 2025 Snow Polo World Cup St. Moritz: Dolfina Aureliana, owned by Adolfo Cambiaso and ridden by Chris Mackenzie (GC Polo).
• 2025 Tortugas Open, Argentina: best horse Show Down, ridden by Barto Castagnola. The AAP also awards a breeders' association prize for the best Polo Argentino bred horse of the final.