2021 Main
| Pl | W | D | L | Diff | Pts | |||
| 1 | Cheonan City | 28 | 16 | 6 | 6 | 50:25 | 25 | 54 |
| 2 | Gimpo FC | 28 | 14 | 10 | 4 | 35:20 | 15 | 52 |
| 3 | Mokpo | 28 | 14 | 8 | 6 | 34:23 | 11 | 50 |
| 4 | Gyeongju KHNP | 28 | 13 | 7 | 8 | 39:30 | 9 | 46 |
| 5 | Gimhae | 28 | 12 | 8 | 8 | 39:35 | 4 | 44 |
| 6 | Busan Kyotong | 28 | 11 | 8 | 9 | 32:33 | -1 | 41 |
| 7 | Ulsan Citizen | 28 | 9 | 11 | 8 | 32:24 | 8 | 38 |
| 8 | Changwon | 28 | 9 | 11 | 8 | 28:27 | 1 | 38 |
| 9 | Daejeon Korail | 28 | 8 | 12 | 8 | 32:30 | 2 | 36 |
| 10 | Paju Citizen | 28 | 8 | 11 | 9 | 32:36 | -4 | 35 |
| 11 | Cheongju | 28 | 9 | 7 | 12 | 37:39 | -2 | 34 |
| 12 | Hwaseong | 28 | 8 | 10 | 10 | 29:34 | -5 | 34 |
| 13 | Pyeongtaek Citizen | 28 | 5 | 7 | 16 | 20:38 | -18 | 22 |
| 14 | Gangneung | 28 | 4 | 8 | 16 | 23:42 | -19 | 20 |
| 15 | Yangju | 28 | 4 | 8 | 16 | 17:43 | -26 | 20 |
Promotion ~ K3 League (Promotion ~ Play Offs: Final)
Promotion ~ K3 League (Promotion ~ Play Offs: Semi~finals)
Promotion ~ K3 League (Promotion ~ Play Offs: Quarter~finals)
K3 League (Relegation)
Relegation
2021 Promotion - Play Offs
Quarter-finals
| 1 | Cheonan City | Bye | |
| 3 | Gimpo FC | Bye | |
| 4 | Mokpo | Gyeongju KHNP | 1 : 1 |
Semi-finals
| 1 | Cheonan City | Bye | |
| 2 | Gimpo FC | Mokpo | 2 : 0 |
Final
| 1 | Cheonan City | Gimpo FC | 2 : 2, 0 : 1 |
Redes Sociales