Flyweights were limited to those boxers weighing a maximum of 51 kilograms (112.4 lbs).
Like all Olympic boxing events, the competition was a straight single-elimination tournament.
Both semifinal losers were awarded bronze medals, so no boxers competed again after their first loss.
Bouts consisted of six rounds each.
[1] 1 Cintrón was ejected from the competition after officials discovered he was underage on the morning of the first round.