Kim Un-guk (; born 28 October 1988) is a North Korean weightlifter, Olympic champion, and two-time world champion.
He is also a Labor Hero and People's Athlete.
At the Olympic Games 2012 he competed in the Men's 62-kg division, in the snatch portion of the competition he set an Olympic Record and matched the current world record of 153 kg. In the clean & jerk portion, his final attempt of 174 kg set a new world record total of 327 kg.
At the 2015 World Weightlifting Championships he failed a doping test and had his results disqualified. He was the original silver medalist.
Kim is an athlete at the April 25 Sports Club.