Oh Kwang-Soo (Korean: 오광수; born October 30, 1965, in Goheung, South Jeolla Province) is a former South Korean boxer.
In 1985, Oh won the light flyweight gold medal at the Boxing World Cup. He defeated 1983 Pan American Games gold medalist Rafael Ramos in the semifinal bout.
In 1986, Oh won the bronze medal at the World Amateur Boxing Championships. In the preliminary bout, he beat Róbert Isaszegi, who won bronze at the 1988 Olympics, by RSC, scoring three knockdowns in the first round. In the second round, he defeated Commonwealth Games gold medalist Scotty Olson. In the quarter-final, Oh defeated another Olympic bronze medalist Marcelino Bolivar. He lost in the semi-final to Luis Román Rolón who was later disqualified after failing a drug test.[1][2]
Oh competed at the 1988 Summer Olympics where he was a favorite to medal, however, he was eliminated in his first bout by a narrow 3–2 decision against eventual silver medalist and future hall of fame champion Michael Carbajal. Oh had defeated Carbajal by a 3–0 margin in a previous meeting.[3]
In February 1990, Oh made his pro debut in minimumweight, and after only six fights challenged Ricardo Lopez for the WBC minimumweight title on January 31, 1993. However, he was TKO'd in the 9th round. Oh had struggled to make weight to minimumweight, and eventually retired after the bout with a record of 6-1-0 without moving up a weight class.