The equestrian events at the 1948 London Summer Olympics included dressage, eventing, and show jumping. All three disciplines had both individual and team competitions. The competitions were held from 9 to 14 August 1948, with the first five days held in the military complex at Aldershot, the endurance day on the army grounds of Aldershot at Tweseldown, and the jumping at the Empire Stadium in Wembley. World War II resulted in a greatly reduced number of competitors, including the absence of Germany, although Brazil made its first appearance in the equestrian events. 103 entries from 17 nations competed. The youngest participant was Aëcio Coelho from Brazil at 23 years old, while the oldest rider was the Italian Alessandro, Count Bettoni Cazzago, at 55 years old.

Sir Henry Morton Llewellyn, 3rd Baronet, was a British equestrian champion. He was born the second son of a colliery owner, Sir David Llewellyn, 1st Baronet.