Kim Ryun-sung is a 24-year-old professional football player from KOR. He currently plays for Jeju SK FC, wearing the number 40 shirt. He plays primarily as a Defender. He stands at 178cm tall and weighs 73kg. His preferred foot is Right. His current market value is estimated at 350K €.

His most recent move was a Free from Pohang Steelers to Jeju SK FC on 2025-01-16. The reported fee was 0.203M €.

Throughout the Korean K League 1 2026, Kim Ryun-sung featured in 1 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.