Kim Won-sik (; born 5 November 1991) is a South Korean professional footballer who plays as a centre-back or defensive midfielder for K League 2 club Cheonan City.
He trained in Reading Academy by KFA overseas training program and played for Pau in the Championnat de France Amateurs.
Kim joined FC Seoul as 2012 K League draft pick.
Kim left Seoul E-Land on 30 December 2023.
On 22 August 2024, Kim moved to Vietnam, signing for V.League 1 club Dong A Thanh Hoa. In October 2024, Kim parted ways with Dong A Thanh Hoa.
While a free agent, Kim signed a contract with K League 2 club Cheonan City in 2025.