The men's 800 metres event at the 1956 Summer Olympics in Melbourne was held on 23, 24, and 26 November 1956. There were a total number of 38 competitors from 24 nations. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The event was won by Tom Courtney, the last of a streak of four American victories in the event and the seventh overall United States victory. Derek Johnson's silver put Great Britain back on the podium for the first time since that nation's own four-Games gold streak ended in 1932. Norway received its first men's 800 metres medal with Audun Boysen's bronze.