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2020 Main
| Pl | W | D | L | Diff | Pts | |||
| 1 | Adelaide Comets | 22 | 14 | 2 | 6 | 45:24 | 21 | 44 |
| 2 | Campbelltown City | 22 | 13 | 4 | 5 | 36:27 | 9 | 43 |
| 3 | NE Metrostars | 22 | 12 | 5 | 5 | 52:32 | 20 | 41 |
| 4 | Croydon Kings | 22 | 11 | 3 | 8 | 42:32 | 10 | 36 |
| 5 | Adelaide Raiders | 22 | 9 | 7 | 6 | 30:27 | 3 | 34 |
| 6 | Adelaide City | 22 | 8 | 7 | 7 | 27:23 | 4 | 31 |
| 7 | Cumberland Utd | 22 | 9 | 4 | 9 | 31:43 | -12 | 31 |
| 8 | Adelaide Olympic | 22 | 8 | 4 | 10 | 32:32 | 0 | 28 |
| 9 | Blue Eagles | 22 | 6 | 9 | 7 | 25:27 | -2 | 27 |
| 10 | Adelaide U21 | 22 | 5 | 9 | 8 | 26:30 | -4 | 24 |
| 11 | Modbury Jets | 22 | 4 | 4 | 14 | 23:48 | -25 | 16 |
| 12 | Para | 22 | 3 | 2 | 17 | 18:42 | -24 | 11 |
Promotion ~ NPL South Australian (Play Offs: )
Relegation
2020 Play Offs
1/8-finals
| 1 | Adelaide Comets | Campbelltown City | 3 : 0, 0 : 0 |
| 5 | Campbelltown City | Bye | |
| 7 | Croydon Kings | Adelaide Raiders | 2 : 0 |
| 8 | NE Metrostars | Adelaide City | 1 : 4 |
Quarter-finals
| 1 | Adelaide Comets | Bye | |
| 3 | Campbelltown City | Bye | |
| 4 | Croydon Kings | Adelaide City | 1 : 3 |
Semi-finals
| 1 | Adelaide Comets | Bye | |
| 2 | Campbelltown City | Adelaide City | 4 : 0 |
Final
| 1 | Adelaide Comets | Campbelltown City | 1 : 3 |
