| 1989 NBL season | |
|---|---|
| League | National Basketball League |
| Sport | Basketball |
| Duration | 20 April 1989 – 24 September 1989 29 September 1989 – 8 October 1989 (Semi-Finals) 14 – 20 October 1989 (Grand Finals) |
| Number of teams | 13 |
| TV partner(s) | Seven Network |
| Regular season | |
| Top seed | North Melbourne Giants |
| Season MVP | Scott Fisher |
| Top scorer | Andrew Gaze (831 - 34.6 ppg) |
| Finals | |
| Champions | North Melbourne Giants |
| Runners-up | Canberra Cannons |
| Finals MVP | Scott Fisher |
The 1989 NBL season was the 11th season of competition since its establishment in 1979. A total of 13 teams contest the league.
The home and away season took place over 23 rounds between 20 April 1989 and 24 September 1989 with semi-final on 29 September 1989 until 8 October 1989 and grand final on 14 October until 20 October 1989.
There were two best of three Elimination finals, four best of three Semi-finals, and then best of three grand final.