| National Soccer League Cup | |
|---|---|
| Tournament details | |
| Country | Australia |
| Dates | 18 March – 20 August 1989 |
| Teams | 14 |
| Final positions | |
| Champions | Adelaide City (2nd title) |
| Runner-up | Sydney Olympic |
| Tournament statistics | |
| Matches played | 13 |
| Goals scored | 43 (3.31 per match) |
| Attendance | 46,696 (3,592 per match) |
The 1989 NSL Cup was the 13th edition of the NSL Cup, which was the main national association football knockout cup competition in Australia.
APIA Leichhardt were the defending champions, having defeated South Melbourne to win their first title in the previous year's final, but they were eliminated in the semi-finals by Sydney Olympic.[1]
Adelaide City defeated Sydney Olympic 2–0 in the final to win their second NSL Cup title.[2]