Athletics at the 1984 Summer Olympics – Men's 800 metres
The men's 800 metres event at the 1984 Summer Olympics in Los Angeles, California took place between 3 and 6 August. Sixty-nine athletes from 55 nations competed. The maximum number of athletes per nation had been set at 3 since the 1930 Olympic Congress. The event was won by Joaquim Cruz of Brazil, the nation's first medal in the men's 800 metres. Sebastian Coe of Great Britain repeated his silver-medal performance from 1980, the eighth man to win two medals in the event.