2021 Season for K League 1 of South Korea

The 2021 season was the K League 1's 18th, and 24 teams competed in the league that year.

The league is also known as K League Classic.

Daegu FC (13-10-10) - Roster | Statistics
FC Seoul (9-14-10) - Roster | Statistics
Gangwon FC (9-14-10) - Roster | Statistics
Gwangju FC (9-19-5) - Roster | Statistics
Incheon United (11-15-7) - Roster | Statistics
Jeju United (10-8-15) - Roster | Statistics
Jeonbuk FC (18-5-10) - Roster | Statistics
Pohang Steelers (11-13-9) - Roster | Statistics
Seongnam FC (9-14-10) - Roster | Statistics
Suwon Bluewings (12-12-9) - Roster | Statistics
Suwon FC (12-12-9) - Roster | Statistics
Ulsan Hyundai (18-5-10) - Roster | Statistics

2021 Championship Season
Daegu FC (15-13-10) - Roster | Statistics
Jeju United (13-10-15) - Roster | Statistics
Jeonbuk FC (22-6-10) - Roster | Statistics
Suwon Bluewings (12-16-10) - Roster | Statistics
Suwon FC (14-15-9) - Roster | Statistics
Ulsan Hyundai (21-6-11) - Roster | Statistics

2021 Relegation Season
FC Seoul (12-15-11) - Roster | Statistics
Gangwon FC (10-15-13) - Roster | Statistics
Gwangju FC (10-21-7) - Roster | Statistics
Incheon United (12-15-11) - Roster | Statistics
Pohang Steelers (12-16-10) - Roster | Statistics
Seongnam FC (11-16-11) - Roster | Statistics

Marker indicates city location, not venue address.