Um Won-sang (Korean: 엄원상; born 6 January 1999) is a South Korean footballer, who plays as a winger for Ulsan Hyundai and the South Korea national under-23 football team.

He mainly plays as a right winger,[2] and he is considered one of the most promising players of his generation in South Korea, regarding his speed, his ball control, his dribbling skills and his creativity