2023 Championship Group
| Pl | W | D | L | Diff | Pts | |||
| 1 | Ulsan HD | 38 | 23 | 7 | 8 | 63:42 | 21 | 76 |
| 2 | Pohang | 38 | 16 | 16 | 6 | 53:40 | 13 | 64 |
| 3 | Gwangju FC | 38 | 16 | 11 | 11 | 47:35 | 12 | 59 |
| 4 | Jeonbuk | 38 | 16 | 9 | 13 | 45:35 | 10 | 57 |
| 5 | Incheon | 38 | 14 | 14 | 10 | 46:42 | 4 | 56 |
| 6 | Daegu | 38 | 13 | 14 | 11 | 42:43 | -1 | 53 |
Promotion ~ AFC Champions League
Promotion ~ AFC Champions League (Qualification: )
Promotion ~ AFC Champions League 2 (Qualification: )
2023 Main
| Pl | W | D | L | Diff | Pts | |||
| 1 | Ulsan HD ✔ | 33 | 20 | 7 | 6 | 56:36 | 20 | 67 |
| 2 | Pohang ✔ | 33 | 15 | 13 | 5 | 48:35 | 13 | 58 |
| 3 | Gwangju FC | 33 | 15 | 9 | 9 | 45:30 | 15 | 54 |
| 4 | Jeonbuk | 33 | 14 | 7 | 12 | 39:31 | 8 | 49 |
| 5 | Daegu | 33 | 12 | 13 | 8 | 38:36 | 2 | 49 |
| 6 | Incheon | 33 | 12 | 12 | 9 | 38:37 | 1 | 48 |
| 7 | Seoul | 33 | 12 | 11 | 10 | 55:42 | 13 | 47 |
| 8 | Daejeon ✔ | 33 | 11 | 12 | 10 | 49:52 | -3 | 45 |
| 9 | Jeju Utd ✔ | 33 | 9 | 8 | 16 | 39:45 | -6 | 35 |
| 10 | Suwon FC ✔ | 33 | 8 | 7 | 18 | 37:65 | -28 | 31 |
| 11 | Gangwon ✔ | 33 | 4 | 14 | 15 | 25:38 | -13 | 26 |
| 12 | Suwon Bluewings ✔ | 33 | 6 | 7 | 20 | 29:51 | -22 | 25 |
Promotion ~ K League 1 (Championship Group: )
K League 1 (Relegation Group: )
Clinched Spots for Teams
Ulsan HD is Qualified for K League 1 (Championship Group )Pohang is Qualified for K League 1 (Championship Group )
Daejeon is K League 1 (Relegation Group )
Jeju Utd is K League 1 (Relegation Group )
Suwon FC is K League 1 (Relegation Group )
Gangwon is K League 1 (Relegation Group )
Suwon Bluewings is K League 1 (Relegation Group )
2023 Relegation
Final
| 1 | Gangwon | Gimpo FC | 2 : 1, 0 : 0 |
| 2 | Suwon FC | Busan | 5 : 2, 1 : 2 |
2023 Relegation Group
| Pl | W | D | L | Diff | Pts | |||
| 7 | Seoul | 38 | 14 | 13 | 11 | 63:49 | 14 | 55 |
| 8 | Daejeon | 38 | 12 | 15 | 11 | 56:58 | -2 | 51 |
| 9 | Jeju Utd | 38 | 10 | 11 | 17 | 43:49 | -6 | 41 |
| 10 | Gangwon | 38 | 6 | 16 | 16 | 30:41 | -11 | 34 |
| 11 | Suwon FC | 38 | 8 | 9 | 21 | 44:76 | -32 | 33 |
| 12 | Suwon Bluewings | 38 | 8 | 9 | 21 | 35:57 | -22 | 33 |
K League 1 (Relegation)
Relegation ~ K League 2
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