Hungary competed at the 1912 Summer Olympics in , Sweden. Austrian and Hungarian results at early Olympic Games are generally kept separate despite the union of the two nations as Austria-Hungary at the time. 121 competitors, all men, took part in 52 events in 11 sports.

The following is the list of number of competitors participating in the Games:

The following is the list of dates, when Hungary won medals:

Eight swimmers competed for Hungary at the 1912 Games. It was the fifth time the nation appeared in swimming, in which Hungary had competed at every Olympic Games.

The 1912 Games were the first time that no Hungarian swimmer won a medal. Baronyi and Las-Torres each made a final once, placing fourth and fifth, respectively. The relay team also advanced to the final, but did not start.

Ranks given for each swimmer are within the heat.

Hungary made its Olympic debut in 1912. The squad's last place finish and 0-2 record are somewhat misleading; Hungary lost both its matches by a single goal in each.

27 athletes represented Hungary. It was the fifth appearance of the nation in athletics, in which Hungary had competed at each Olympics. Kóczán's bronze medal in the javelin throw was the only athletics medal won by a Hungarian; he and Wardener were the only two to advance to the finals via eliminations (Kárpáti and Ripszám ran the marathon, which consisted of only the final). Wardener finished 9th in the high jump.

Ranks given are within that athlete's heat for running events.

Five cyclists represented Hungary. It was the first appearance of the nation in cycling. István Müller had the best time in the time trial, the only race held, finishing 73rd. The four Hungarian cyclists who finished had a combined time that placed them twelfth in the team competition.

Thirteen fencers represented Hungary, including six of the eight men who had competed in 1908. It was the third appearance of the nation in fencing. The Hungarians dominated the sabre competition to an even greater extent than they had four years earlier, taking all three of the medals and having seven of the eight finalists in the individual event (they had taken the gold and silver, with five of eight finalists in 1908). Not one of the Hungarian sabrists was eliminated during the first two rounds. The sabre team also successfully defended its gold medal in the team competition. The Hungarians did not fare as well in either the foil or the épée, however, with only one fencer reaching the final in either of those two events as Béla Békessy placed seventh in the foil.

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