| 1983 NBL season | |
|---|---|
| League | National Basketball League |
| Sport | Basketball |
| Duration | 10 February – 18 June 1983 (Regular season) 23 June – 4 July 1983 (Finals) |
| Number of games | 22 |
| Number of teams | 16 |
| TV partner(s) | ABC |
| Regular season | |
| Season champions | Sydney Supersonics (Eastern) Geelong Cats (Western) |
| Season MVP | Owen Wells (Sydney) |
| Top scorer | Mike Jones (Illawarra) |
| Finals | |
| Champions | Canberra Cannons (1st title) |
| Runners-up | West Adelaide Bearcats |
The 1983 NBL season was the fifth season of the National Basketball League (NBL). The regular season began on 10 February and ended on 18 June. The finals began on 23 June with the divisional finals before concluding on 4 July with the NBL Grand Final.