| 01 Mar 21 | r01   | Seongnam FCSeongnam FC | 0 - 0 | Jeju United FCJeju United F |
| |
| 06 Mar 21 | r02 | Jeju United FCJeju United F | 1 - 1 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| |
| 09 Mar 21 | r03 | Jeju United FCJeju United F | 1 - 0 | Pohang SteelersPohang Steele |
| |
| 13 Mar 21 | r04 | Daegu FCDaegu FC | 1 - 1 | Jeju United FCJeju United F |
| |
| 16 Mar 21 | r05 | Ulsan Hyundai FCUlsan Hyundai | 0 - 0 | Jeju United FCJeju United F |
| |
| 20 Mar 21 | r06 | Jeju United FCJeju United F | 1 - 1 | Gwangju FCGwangju FC |
| |
| 04 Apr 21 | r07 | Suwon FCSuwon FC | 2 - 1 | Jeju United FCJeju United F |
| |
| 07 Apr 21 | r08 | Jeju United FCJeju United F | 1 - 1 | Gangwon FCGangwon FC |
| |
| 11 Apr 21 | r09 | Jeju United FCJeju United F | 2 - 1 | Suwon Samsung BluewingsSuwon Samsung |
| |
| 17 Apr 21 | r10 | Incheon United FCIncheon Unite | 0 - 3 | Jeju United FCJeju United F |
| |
| 21 Apr 21 | r11 | Jeju United FCJeju United F | 2 - 1 | FC SeoulFC Seoul |
| |
| 24 Apr 21 | r12 | Pohang SteelersPohang Steele | 0 - 0 | Jeju United FCJeju United F |
| |
| 02 May 21 | r13 | Jeonbuk Hyundai MotorsJeonbuk Hyund | 1 - 1 | Jeju United FCJeju United F |
| |
| 08 May 21 | r14 | Jeju United FCJeju United F | 1 - 3 | Suwon FCSuwon FC |
| |
| 12 May 21 | r15 | Suwon Samsung BluewingsSuwon Samsung | 3 - 2 | Jeju United FCJeju United F |
| |
| 16 May 21 | r16 | Jeju United FCJeju United F | 1 - 2 | Daegu FCDaegu FC |
| |
| 19 May 21 | r17  | Gwangju FCGwangju FC | 0 - 0 | Jeju United FCJeju United F |
| |
| 22 May 21 | r18 | Jeju United FCJeju United F | 2 - 2 | Seongnam FCSeongnam FC |
| |
| 29 May 21 | r19 | Jeju United FCJeju United F | 1 - 2 | Ulsan Hyundai FCUlsan Hyundai |
| |
| 25 Jul 21 | r21 | Gangwon FCGangwon FC | 2 - 2 | Jeju United FCJeju United F |
| |
| 31 Jul 21 | r22 | Jeju United FCJeju United F | 1 - 4 | Incheon United FCIncheon Unite |
| |
| 07 Aug 21 | r23 | Suwon Samsung BluewingsSuwon Samsung | 0 - 0 | Jeju United FCJeju United F |
| |
| 14 Aug 21 | r25 | Jeju United FCJeju United F | 2 - 2 | Ulsan Hyundai FCUlsan Hyundai |
| |
| 18 Aug 21 | r20 | FC SeoulFC Seoul | 0 - 1 | Jeju United FCJeju United F |
| |
| 21 Aug 21 | r26 | Suwon FCSuwon FC | 1 - 0 | Jeju United FCJeju United F |
| |
| 29 Aug 21 | r28 | Jeju United FCJeju United F | 1 - 0 | FC SeoulFC Seoul |
| |
| 11 Sep 21 | r29 | Incheon United FCIncheon Unite | 1 - 2 | Jeju United FCJeju United F |
| |
| 18 Sep 21 | r30 | Gwangju FCGwangju FC | 1 - 1 | Jeju United FCJeju United F |
| |
| 22 Sep 21 | r31 | Jeju United FCJeju United F | 0 - 1 | Daegu FCDaegu FC |
| |
| 25 Sep 21 | r32 | Pohang SteelersPohang Steele | 2 - 4 | Jeju United FCJeju United F |
| |
| 03 Oct 21 | r33 | Jeju United FCJeju United F | 2 - 1 | Seongnam FCSeongnam FC |
| |
| 10 Oct 21 | r27 | Gangwon FCGangwon FC | 2 - 2 | Jeju United FCJeju United F |
| |
| 24 Oct 21 | r24 | Jeju United FCJeju United F | 2 - 2 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| |
| 31 Oct 21 | r01 | Daegu FCDaegu FC | 0 - 5 | Jeju United FCJeju United F |
| |
| 06 Nov 21 | r02 | Jeju United FCJeju United F | 2 - 0 | Suwon Samsung BluewingsSuwon Samsung |
| |
| 21 Nov 21 | r03 | Ulsan Hyundai FCUlsan Hyundai | 3 - 1 | Jeju United FCJeju United F |
| |
| 27 Nov 21 | r04 | Jeju United FCJeju United F | 1 - 0 | Suwon FCSuwon FC |
| |
| 05 Dec 21 | r05 | Jeonbuk Hyundai MotorsJeonbuk Hyund | 2 - 0 | Jeju United FCJeju United F |
Team 2021 Schedules
Bucheon FC 1995
Daejeon Hana Citizen
FC Anyang
FC Seoul
Gangwon FC
Gimcheon Sangmu
Gwangju FC
Incheon United
Jeju SK
Jeonbuk Hyundai Motors
Pohang Steelers
Ulsan HD
League Table
List
Poster
= Banner Image 
= Fanart Image 
= Timeline Details