McKoy made a comeback at the 1991 World Championships, finishing fourth again in 110 m hurdles. At the Olympic Games in Barcelona, McKoy put his fourth-place streak behind him and won the gold medal in 13.12 seconds. It was the first Canadian Olympic gold medal in track and field since Duncan McNaughton's first-place finish in the high jump competition in 1932 and at the same time, Mark McKoy became the first black Canadian to win an Olympic gold medal. At the 1993 IAAF World Indoor Championships in Toronto he won the 60 m hurdles.