2018 Final Stage
Quarter-finals
| 1 | Campbelltown City | Canberra Croatia | 3 : 0 |
| 2 | Perth SC | Sydney Olympic | 0 : 1 |
| 3 | Queensland Lions | Edgeworth E. | 1 : 0 |
| 4 | Devonport | Heidelberg Utd | 2 : 3 |
Semi-finals
| 1 | Campbelltown City | Sydney Olympic | 2 : 1 |
| 2 | Queensland Lions | Heidelberg Utd | 2 : 1 |
Final
| 1 | Campbelltown City | Queensland Lions | 2 : 1 |
2018 Main
| Pl | W | D | L | Diff | Pts | |||
| 1 | Campbelltown City | 22 | 16 | 3 | 3 | 54:24 | 30 | 51 |
| 2 | Adelaide City | 22 | 14 | 4 | 4 | 52:19 | 33 | 46 |
| 3 | NE Metrostars | 22 | 15 | 1 | 6 | 51:27 | 24 | 46 |
| 4 | Adelaide Comets | 22 | 13 | 5 | 4 | 40:26 | 14 | 44 |
| 5 | Adelaide U21 | 22 | 10 | 5 | 7 | 42:29 | 13 | 35 |
| 6 | Adelaide Olympic | 22 | 7 | 7 | 8 | 28:25 | 3 | 28 |
| 7 | West Adelaide | 22 | 8 | 3 | 11 | 30:46 | -16 | 27 |
| 8 | Para | 22 | 8 | 1 | 13 | 27:38 | -11 | 25 |
| 9 | South Adelaide | 22 | 6 | 3 | 13 | 29:55 | -26 | 21 |
| 10 | Croydon Kings | 22 | 5 | 4 | 13 | 28:39 | -11 | 19 |
| 11 | Sturt Lions | 22 | 5 | 4 | 13 | 24:48 | -24 | 19 |
| 12 | West Torrens | 22 | 4 | 2 | 16 | 20:49 | -29 | 14 |
Promotion ~ National Premier Leagues Play Offs
Promotion ~ NPL South Australian (Play Offs: )
Relegation
2018 Play Offs
1/8-finals
| 1 | Campbelltown City | Adelaide City | 1 : 0, 0 : 0 |
| 7 | NE Metrostars | Adelaide Olympic | 1 : 0 |
| 8 | Adelaide Comets | Adelaide U21 | 1 : 3 |
Quarter-finals
| 1 | Campbelltown City | Bye | |
| 4 | NE Metrostars | Adelaide U21 | 1 : 0 |
Semi-finals
| 1 | Campbelltown City | Bye | |
| 2 | Adelaide City | NE Metrostars | 2 : 0 |
Final
| 1 | Campbelltown City | Adelaide City | 1 : 0 |
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