The men's 100 metre freestyle event at the 1956 Olympic Games took place between 29 and 30 November. There were 34 competitors from 19 nations. Nations had been limited to three swimmers each since the 1924 Games. The event was won by Jon Henricks of Australia, the nation's first medal in the event. Australia would win a second 0.4 seconds later (John Devitt's silver) and a third 0.9 seconds after that (Gary Chapman's bronze), sweeping the podium—the first sweep in the men's 100 metre freestyle since the United States did it in 1920 and 1924, and the first sweep of any event by Australian competitors. This year, the Americans finished fourth through sixth. It was the first time since 1924 that Japan had competed (that is, excluding 1948) but not medaled.