Oh Sang-uk (born 30 September 1996) is a South Korean sabre fencer.
He is the individual gold medalist at the 2019 World Fencing Championships, 2019 Asian Fencing Championships, and 2019 Summer Universiade.
He is also the team gold medalist at the 2019 World Fencing Championships, 2019 Summer Universiade, 2018 World Fencing Championships, 2018 Asian Games, 2017 World Fencing Championships, 2017 Asian Fencing Championships, and 2016 Asian Fencing Championships.