2020 Main
| Pl | W | D | L | Diff | Pts | |||
| 1 | Nong Bua Pitchaya | 34 | 21 | 12 | 1 | 63:16 | 47 | 75 |
| 2 | Chiangmai Utd | 34 | 20 | 9 | 5 | 64:28 | 36 | 69 |
| 3 | Nakhon Pathom | 34 | 17 | 10 | 7 | 66:36 | 30 | 61 |
| 4 | Khonkaen Utd | 34 | 18 | 6 | 10 | 56:37 | 19 | 60 |
| 5 | Phrae | 34 | 16 | 11 | 7 | 49:27 | 22 | 59 |
| 6 | Chainat | 34 | 16 | 9 | 9 | 61:47 | 14 | 57 |
| 7 | Chiangmai FC | 34 | 16 | 8 | 10 | 56:45 | 11 | 56 |
| 8 | Ranong | 34 | 16 | 5 | 13 | 45:41 | 4 | 53 |
| 9 | Ayutthaya Utd | 34 | 13 | 8 | 13 | 46:45 | 1 | 47 |
| 10 | Khonkaen FC | 34 | 11 | 8 | 15 | 34:38 | -4 | 41 |
| 11 | Thai Navy | 34 | 11 | 7 | 16 | 47:53 | -6 | 40 |
| 12 | Lampang | 34 | 11 | 7 | 16 | 39:46 | -7 | 40 |
| 13 | Customs Utd | 34 | 11 | 6 | 17 | 37:62 | -25 | 39 |
| 14 | Udon Thani | 34 | 9 | 11 | 14 | 44:46 | -2 | 38 |
| 15 | Kasetsart | 34 | 11 | 5 | 18 | 36:53 | -17 | 38 |
| 16 | Sisaket | 34 | 9 | 9 | 16 | 34:44 | -10 | 36 |
| 17 | Uthai Thani | 34 | 5 | 10 | 19 | 34:53 | -19 | 25 |
| 18 | Samut Sakhon | 34 | 2 | 5 | 27 | 25:119 | -94 | 11 |
Promotion ~ Thai League 1
Promotion ~ Thai League 2 (Promotion ~ Play Offs: )
Relegation
2020 Promotion - Play Offs
Semi-finals
| 1 | Nakhon Pathom (3) | Chainat (6) | 2 : 0, 2 : 1 |
| 2 | Khonkaen Utd. (4) | Phrae (5) | 2 : 1, 3 : 1 |
Final
| 1 | Nakhon Pathom (3) | Khonkaen Utd. (4) | 2 : 2, 1 : 2 |
Redes Sociales