Athletics at the 1952 Summer Olympics – Men's 400 metres
The men's 400 metres sprint event at the 1952 Olympic Games took place between July 24 and July 25. Seventy-one athletes from 35 nations competed. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The event was won by George Rhoden of Jamaica, the second consecutive title in the event by a Jamaican. Herb McKenley repeated his silver medal performance from 1948, becoming the second man to win two medals in the event (after Guy Butler of Great Britain in 1920 and 1924). 