Athletics at the 1948 Summer Olympics – Men's 400 metres
The men's 400 metres sprint event at the 1948 Olympic Games took place between August 4 and August 5. Fifty-three athletes from 28 nations competed. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The final was won by Jamaican Arthur Wint coming from almost 10 meters back to catch teammate and world record holder Herb McKenley. This was Jamaica's first Olympic gold medal in any event, and broke a string of 3 straight American victories in the men's 400 metres.