Athletics at the 1928 Summer Olympics – Men's 400 metres
The men's 400 metres was an event at the 1928 Summer Olympics in Amsterdam. Fifty athletes from 20 nations competed. NOCs were limited to 4 competitors each. The event was won by Ray Barbuti of the United States, the first title for the Americans in the event since 1912 and the fifth overall. Jimmy Ball won Canada's first medal in the event, a silver.