Yoo Yong-sung (Korean: 유용성; Hanja: 柳鏞成; born 25 October 1974) is a retired badminton player from South Korea.

He is two time Olympic silver medalist.

[1] Men's doubles Men's doubles Men's doubles Men's doubles Mixed doubles Men's doubles Mixed doubles Men's doubles Mixed doubles Men's doubles Mixed doubles The World Badminton Grand Prix sanctioned by International Badminton Federation (IBF) since 1983.

Men's doubles Mixed doubles Men's doubles