Equestrianism (from Latin equester, equestr-, horseman, horse) more often known as riding, horseback riding (American English) or horse riding (British English) refers to the skill of riding, driving, steeplechasing or vaulting with horses. This broad description includes the use of horses for practical working purposes, transportation, recreational activities, artistic or cultural exercises, and competitive sport.

Horses are trained and ridden for practical working purposes such as in police work or for controlling herd animals on a ranch. They are also used in competitive sports including, but not limited to, dressage, endurance riding, eventing, reining, show jumping, tent pegging, vaulting, polo, horse racing, driving, and rodeo. (See additional equestrian sports listed later in this article for more examples.) Some popular forms of competition are grouped together at horse shows, where horses perform in a wide variety of disciplines. Horses (and other equids such as mules and donkeys) are used for non-competitive recreational riding such as fox hunting, trail riding or hacking. There is public access to horse trails in almost every part of the world; many parks, ranches, and public stables offer both guided and independent riding. Horses are also used for therapeutic purposes, both in specialized paraequestrian competition as well as non-competitive riding to improve human health and emotional development.