- The first recorded history of polo in China and the Persian Empire.
- British officers stationed in India found the Silchar Polo Club, the first polo club of modern times.
- The Calcutta Polo Club, the world's oldest polo club still active today, is founded.
- British polo players bring the sport back with them when they return from India to England.
- James Gordon Bennett, Jr., the wealthy publisher of the New York Herald, brings polo from England to New York and leads the founding of America's first polo club, the Westchester Polo Club.
- At the first Westchester Cup match, held in Newport, Rhode Island, the United Kingdom defeats the U.S. team.
- The U.S. adopts the player handicap system, a form of scoring system.
- The United States Polo Association (USPA) is founded.
- The maximum height of polo ponies is raised from 14 hands to 14.2.
- Polo is played at the Olympics (1900, 1908, 1920, 1924, 1936). The 1800s.
- At the first United States Open Polo Championship, held in New York, the U.S. team defeats the British team.
- The player handicap system is introduced in England and India.
- The Indoor Polo Association, originally established for arena polo, later becomes part of the U.S. Polo Association. The ball used in arena polo is between 12.5 and 15 inches in diameter.
- The height restriction on polo ponies is lifted.
- More than 30,000 spectators regularly attend matches at the Meadowbrook Polo Club on Long Island, New York.
- Amateur polo player Walt Disney releases an animated short titled "Mickey's Polo Team".
- Polo revives in the 1940s and is especially loved and embraced by cowboys, particularly in Texas.
- Elizabeth Daily, Sue Sally Hale, Virginia Merchant and Jorie Butler Richardson become the first women to be assigned a handicap by the USPA.
- Ami Shinitsky publishes the first issue of Polo Player's Edition, the official publication of the USPA.
- The United States Polo Association creates its licensor program to manage its brands and promote the sport of polo.
- The Federation of International Polo (FIP) is founded to support polo's return to the Olympics.
- The U.S. polo team wins the FIP World Cup in Berlin. The team consists of Julio Arellano, John Wigdahl, Horton Schwartz and Charlie Bostwick.
- The U.S. Polo Association celebrates its 100th anniversary.
- Certified professional umpires are trained to meet the rising number of professional players.
- The Polo Museum and Hall of Fame opens its doors in Lake Worth, Florida.
- The Santa Barbara Polo & Racquet Club hosts the FIP World Championship, and former United States Ambassador Glen Holden is elected president of the American FIP for the first time in America.
- The International Polo Club opens in Palm Beach, and the 100th anniversary of the U.S. Open Polo Championship is celebrated.
- The USPA meets England's Hurlingham Polo Association for the Westchester Cup. Played in the United States for the first time in 70 years, the match becomes a historic contest.
- After a 13-year hiatus, England defeats the U.S. by a single goal in the international Westchester Cup and takes the historic trophy back home.
- Qualifiers begin in Florida for the official Team USPA training and mentorship program for young American male and female polo players.
