| 28 Feb 21 | r01   | Pohang SteelersPohang Steele | 2 - 1 | Incheon United FCIncheon Unite |
| |
| 06 Mar 21 | r02 | Incheon United FCIncheon Unite | 2 - 1 | Daegu FCDaegu FC |
| |
| 09 Mar 21 | r03 | Ulsan Hyundai FCUlsan Hyundai | 3 - 1 | Incheon United FCIncheon Unite |
| |
| 13 Mar 21 | r04 | Incheon United FCIncheon Unite | 0 - 1 | FC SeoulFC Seoul |
| |
| 17 Mar 21 | r05 | Incheon United FCIncheon Unite | 4 - 1 | Suwon FCSuwon FC |
| |
| 21 Mar 21 | r06 | Gangwon FCGangwon FC | 2 - 0 | Incheon United FCIncheon Unite |
| |
| 04 Apr 21 | r07 | Gwangju FCGwangju FC | 2 - 1 | Incheon United FCIncheon Unite |
| |
| 07 Apr 21 | r08 | Incheon United FCIncheon Unite | 0 - 0 | Suwon Samsung BluewingsSuwon Samsung |
| |
| 11 Apr 21 | r09 | Jeonbuk Hyundai MotorsJeonbuk Hyund | 5 - 0 | Incheon United FCIncheon Unite |
| |
| 17 Apr 21 | r10 | Incheon United FCIncheon Unite | 0 - 3 | Jeju United FCJeju United F |
| |
| 21 Apr 21 | r11 | Seongnam FCSeongnam FC | 1 - 3 | Incheon United FCIncheon Unite |
| |
| 25 Apr 21 | r12 | Incheon United FCIncheon Unite | 0 - 0 | Ulsan Hyundai FCUlsan Hyundai |
| |
| 02 May 21 | r13 | Incheon United FCIncheon Unite | 1 - 0 | Gangwon FCGangwon FC |
| |
| 08 May 21 | r14 | Daegu FCDaegu FC | 3 - 0 | Incheon United FCIncheon Unite |
| |
| 11 May 21 | r15 | Incheon United FCIncheon Unite | 1 - 1 | Pohang SteelersPohang Steele |
| |
| 15 May 21 | r16 | Incheon United FCIncheon Unite | 2 - 1 | Gwangju FCGwangju FC |
| |
| 21 May 21 | r18 | Suwon FCSuwon FC | 2 - 2 | Incheon United FCIncheon Unite |
| |
| 29 May 21 | r19 | Incheon United FCIncheon Unite | 1 - 1 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| |
| 14 Jul 21 | r17 | FC SeoulFC Seoul | 0 - 1 | Incheon United FCIncheon Unite |
| |
| 23 Jul 21 | r21 | Suwon Samsung BluewingsSuwon Samsung | 1 - 2 | Incheon United FCIncheon Unite |
| |
| 31 Jul 21 | r22 | Jeju United FCJeju United F | 1 - 4 | Incheon United FCIncheon Unite |
| |
| 08 Aug 21 | r23  | Incheon United FCIncheon Unite | 0 - 0 | Suwon FCSuwon FC |
| |
| 15 Aug 21 | r25 | Gwangju FCGwangju FC | 1 - 0 | Incheon United FCIncheon Unite |
| |
| 18 Aug 21 | r20 | Incheon United FCIncheon Unite | 1 - 0 | Seongnam FCSeongnam FC |
| |
| 25 Aug 21 | r27 | Incheon United FCIncheon Unite | 2 - 0 | Daegu FCDaegu FC |
| |
| 29 Aug 21 | r28 | Ulsan Hyundai FCUlsan Hyundai | 3 - 2 | Incheon United FCIncheon Unite |
| |
| 11 Sep 21 | r29 | Incheon United FCIncheon Unite | 1 - 2 | Jeju United FCJeju United F |
| |
| 19 Sep 21 | r30 | Incheon United FCIncheon Unite | 0 - 1 | Seongnam FCSeongnam FC |
| |
| 22 Sep 21 | r31 | FC SeoulFC Seoul | 0 - 0 | Incheon United FCIncheon Unite |
| |
| 25 Sep 21 | r32 | Jeonbuk Hyundai MotorsJeonbuk Hyund | 2 - 0 | Incheon United FCIncheon Unite |
| |
| 02 Oct 21 | r33 | Incheon United FCIncheon Unite | 0 - 1 | Suwon Samsung BluewingsSuwon Samsung |
| |
| 06 Oct 21 | r26 | Incheon United FCIncheon Unite | 0 - 1 | Gangwon FCGangwon FC |
| |
| 24 Oct 21 | r24 | Pohang SteelersPohang Steele | 0 - 1 | Incheon United FCIncheon Unite |
| |
| 30 Oct 21 | r01 | Incheon United FCIncheon Unite | 2 - 0 | FC SeoulFC Seoul |
| |
| 03 Nov 21 | r02 | Seongnam FCSeongnam FC | 1 - 1 | Incheon United FCIncheon Unite |
| |
| 07 Nov 21 | r03 | Gangwon FCGangwon FC | 1 - 1 | Incheon United FCIncheon Unite |
| |
| 28 Nov 21 | r04 | Incheon United FCIncheon Unite | 0 - 0 | Pohang SteelersPohang Steele |
| |
| 04 Dec 21 | r05 | Gwangju FCGwangju FC | 1 - 1 | Incheon United FCIncheon Unite |
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