Last updated: 31 December 2020 Source: Fixtures and Results at FC Seoul Official Website Fixtures and Results at FC Seoul Official Website (in English) All players registered for the 2020 season are listed.

Note: Where a player has not declared an international allegiance, nation is determined by place of birth.

※ In: Transferred from other teams in the middle of the season.

※ Discharged: Transferred from Sanjgu Sangmu for military service in the middle of the season (registered in 2020 season).

※ Conscripted: Transferred to Sanjgu Sangmu for military service after the end of the season.