2018 Championship Group
| Pl | W | D | L | Diff | Pts | |||
| 1 | Jeonbuk | 38 | 26 | 8 | 4 | 75:31 | 44 | 86 |
| 2 | Gyeongnam | 38 | 18 | 11 | 9 | 59:44 | 15 | 65 |
| 3 | Ulsan Hyundai | 38 | 17 | 12 | 9 | 61:46 | 15 | 63 |
| 4 | Jeju Utd | 38 | 14 | 12 | 12 | 42:42 | 0 | 54 |
| 5 | Pohang | 38 | 15 | 9 | 14 | 48:49 | -1 | 54 |
| 6 | Suwon Bluewings | 38 | 13 | 11 | 14 | 53:54 | -1 | 50 |
Promotion ~ AFC Champions League
Promotion ~ AFC Champions League (Qualification: )
2018 Main
| Pl | W | D | L | Diff | Pts | |||
| 1 | Jeonbuk | 33 | 24 | 5 | 4 | 68:28 | 40 | 77 |
| 2 | Gyeongnam | 33 | 16 | 10 | 7 | 54:39 | 15 | 58 |
| 3 | Ulsan Hyundai | 33 | 15 | 11 | 7 | 53:38 | 15 | 56 |
| 4 | Suwon Bluewings | 33 | 13 | 10 | 10 | 48:42 | 6 | 49 |
| 5 | Pohang | 33 | 13 | 8 | 12 | 40:41 | -1 | 47 |
| 6 | Jeju Utd | 33 | 11 | 11 | 11 | 37:40 | -3 | 44 |
| 7 | Gangwon | 33 | 10 | 9 | 14 | 51:55 | -4 | 39 |
| 8 | Daegu | 33 | 11 | 6 | 16 | 42:54 | -12 | 39 |
| 9 | Seoul | 33 | 8 | 11 | 14 | 35:42 | -7 | 35 |
| 10 | Gimcheon Sangmu | 33 | 8 | 9 | 16 | 38:49 | -11 | 33 |
| 11 | Jeonnam | 33 | 8 | 8 | 17 | 39:59 | -20 | 32 |
| 12 | Incheon | 33 | 6 | 12 | 15 | 46:64 | -18 | 30 |
Promotion ~ K League 1 (Championship Group: )
K League 1 (Relegation Group: )
2018 Relegation
Quarter-finals
| 1 | Seoul | Bye | |
| 3 | Busan | Bye | |
| 4 | Daejeon | Gwangju FC | 1 : 0 |
Semi-finals
| 1 | Seoul | Bye | |
| 2 | Busan | Daejeon | 3 : 0 |
Final
| 1 | Seoul | Busan | 1 : 1, 3 : 1 |
2018 Relegation Group
| Pl | W | D | L | Diff | Pts | |||
| 1 | Daegu | 38 | 14 | 8 | 16 | 47:56 | -9 | 50 |
| 2 | Gangwon | 38 | 12 | 10 | 16 | 56:60 | -4 | 46 |
| 3 | Incheon | 38 | 10 | 12 | 16 | 55:69 | -14 | 42 |
| 4 | Seoul | 38 | 9 | 13 | 16 | 40:48 | -8 | 40 |
| 5 | Gimcheon Sangmu | 38 | 10 | 10 | 18 | 41:52 | -11 | 40 |
| 6 | Jeonnam | 38 | 8 | 8 | 22 | 43:69 | -26 | 32 |
K League 1 (Relegation)
Relegation ~ K League 2
Redes Sociales