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| 1989 NBL season | |
|---|---|
| League | National Basketball League |
| Sport | Basketball |
| Duration | 20 April – 24 September 1989 29 September – 8 October 1989 (Semi-finals) 14 – 20 October 1989 (Grand Finals) |
| Number of teams | 13 |
| TV partner(s) | Seven Network |
| Regular season | |
| Season champions | Canberra Cannons |
| Season MVP | Scott Fisher (North Melbourne) |
| Top scorer | Andrew Gaze (Melbourne) |
| Finals | |
| Champions | North Melbourne Giants (1st title) |
| Runners-up | Canberra Cannons |
| Finals MVP | Scott Fisher (North Melbourne) |
The 1989 NBL season was the 11th season of competition since its establishment in 1979. A total of 13 teams contest the league.