Spain competed in the Olympic water polo tournament for the first time in 1920. The Bergvall System was in use at the time. Spain took advantage of an Italian forfeit in the round of 16 to advance to the quarterfinals, but there met the dominant Great Britain—the British team was on its way to its fourth gold medal in four appearances. Losing to the gold medalist, however, had its advantages under the Bergvall System. Spain got a chance to contest the silver medal. It lost in the silver medal semifinals to the United States, however, and the Americans' loss to Belgium kept Spain from trying for the bronze.
14 athletes represented Spain in 1920. It was the nation's debut in athletics. Domínguez's 25th-place finish in the cross country was the only time a Spanish athlete competed in, and finished, an event final.
Spain competed in the Olympic football tournament for the first time. The team compiled a record of 4–1 on the way to a silver medal; the four wins were the most of any team in 1920. A first-round win over Denmark set up a quarterfinal contest against eventual gold-medalists Belgium—Spain's only loss. In the consolation tournament, the Spanish squad won its matches against Sweden and Italy to advance to the silver medal game against the Netherlands, which Spain won.
Spain competed in the Olympic polo tournament for the first time. The team took the silver medal, beating the United States in the semifinals but losing to Great Britain in the final.
Seven shooters represented Spain in 1920. It was the nation's debut in the sport. Spain's best result was sixth place, achieved in the team military pistol event.
Four tennis players, all men, competed for Spain in 1920. It was the nation's debut in the sport. Manuel Alonso had the most success in the singles, winning three matches to advance to the quarterfinals before being beaten. Fernández de Liencres and de Satrústegui were the better of the two doubles pairs, advancing to the second round.
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