The men's 110 metres hurdles event at the 1984 Summer Olympics in Los Angeles, California took place on 5 and 6 August 1984.

World record holder Renaldo Nehemiah of the United States was also prevented from competing, because the IOC claimed "he had lost his amateur status" by playing professional football, an entirely different sport.

The favorite therefore was 1983 World Champion Greg Foster of the United States, though as usual all of the American hurdlers were potential medalists.

The "fastest loser" system, also introduced in 1964, was not used as unnecessary for achieving the correct number of hurdlers advancing to the semifinals and final.

Greg Foster equalized the standing Olympic record with 13.24 seconds; he and Roger Kingdom both matched that time in the semifinals as well.