| Tournament details | |
|---|---|
| Country |  Australia New Zealand |
| Dates | 10 February – 30 October 2018 |
| Teams | 781 |
| Final positions | |
| Champions | Adelaide United (2nd title) |
| Runner-up | Sydney FC |
| Tournament statistics | |
| Matches played | 31 |
| Goals scored | 100 (3.23 per match) |
| Attendance | 89,128 (2,875 per match) |
| Top goal scorer(s) | Craig Goodwin (5 goals) |
The 2018 FFA Cup was the fifth season of the FFA Cup, the main national soccer knockout cup competition in Australia. 32 teams contested the competition proper (from the round of 32), including the 10 A-League teams and 21 Football Federation Australia (FFA) member federation teams determined through individual state qualifying rounds, as well as the reigning National Premier Leagues Champion (Heidelberg United from Victoria).