The United States Equestrian Federation is the national governing body for most equestrian sports in the United States. It began on January 20, 1917, as the Association of American Horse Shows, later changed to the American Horse Shows Association. In 2001, the organization changed its name to USA Equestrian and, in 2003 it merged with the United States Equestrian Team. In 2017, USEF rebranded as US Equestrian. In 2019, USEF abandoned and sold its own laboratory to the University of Kentucky.
Competitions governed by US Equestrian include dressage, driving, endurance riding, eventing, hunt seat equitation, hunter, jumper, para-equestrian, reining, roadster, saddle seat equitation, vaulting, and western riding competition including equitation, western pleasure, reining, trail, western dressage, and related events.
The organization also governs breed shows held in the United States for the Andalusian, Lusitano, Arabian, Half-Arabian/Anglo-Arabian, Connemara, Friesian, Hackney, Morgan, American Saddlebred, National Show Horse, Paso Fino, Shetland, and Welsh breeds.
US Equestrian keeps track of yearly points accumulated at individual horse shows throughout the year and gives awards based on these points at the end of the year. Horse shows governed under the USEF are given an AA, A, B, or C rating. Shows with an AA rating are the most prestigious and often offer the most prize money, whereas shows with a C rating are more local, usually awarding less prize money. Competitions recognized by the USEF must follow its rules and bylaws.