The individual show jumping in equestrian at the 1948 Summer Olympics in London was held at the Wembley Stadium on 14 August. The competition consisted of a single round of jumping. In the case of a tie in points, a jump-off was arranged. The jump-off had no time limit, however, the time taken to complete the jump-off was used as a tie-breaker. The points from the individual competition were also used in the team competition. There were 44 competitors from 15 nations, with nations able to send up to three riders each. The event was won by Humberto Mariles of Mexico, with his teammate Rubén Uriza taking silver at the top of a three-way jump-off for second place. Mariles' win was Mexico's first victory in the event. Jean-François d'Orgeix of France earned that nation's first individual jumping medal since 1928 with his bronze.

Argentina at the 1948 Summer Olympics in London, England was the nation's eighth appearance out of eleven editions of the Summer Olympic Games. Argentina sent to the 1948 Summer Olympics its fifth national team, under the auspices of the Argentine Olympic Committee of 199 athletes who competed in 101 events in 16 sports. It would not be until the 2016 Summer Olympics that the athlete delegation were surpassed. The medals haul of 3 golds, 3 silvers, and a bronze tied the medals haul in 1928. The achievement of 7 medals in an edition of the Olympics has yet to be matched.