The Melbourne Tigers won the 2005–06 NBL championship, beating the Sydney Kings 3–0 in the Grand Final series. The Sydney Kings finished top of the regular season at 26–6; eleven clubs played 32 games each.
Cortez Groves (Wollongong Hawks) led the league in scoring with 24.0 points a game. Larry Abney led in rebounds (11.3 a game) and Darryl McDonald in assists (7.0). The season's best single-game score was Derek Rucker's 45 points for the Brisbane Bullets against the West Sydney Razorbacks on 3 December 2005. The biggest win was the West Sydney Razorbacks' 50-point defeat of the NZ Breakers, 123–73.
| # | Team | P | W | L | +/- |
|---|---|---|---|---|---|
| 1 | Sydney Kings | 32 | 26 | 6 | +378 |
| 2 | Melbourne Tigers | 32 | 25 | 7 | +321 |
| 3 | Wollongong Hawks | 32 | 19 | 13 | +127 |
| 4 | Adelaide 36ers | 32 | 19 | 13 | -55 |
| 5 | Cairns Taipans | 32 | 18 | 14 | +93 |
| 6 | Brisbane Bullets | 32 | 17 | 15 | +93 |
| 7 | Perth Wildcats | 32 | 16 | 16 | +51 |
| 8 | Hunter Pirates | 32 | 13 | 19 | -186 |
| 9 | Townsville Crocodiles | 32 | 9 | 23 | -200 |
| 10 | NZ Breakers | 32 | 9 | 23 | -292 |
| 11 | West Sydney Razorbacks | 32 | 5 | 27 | -330 |
Marked: the teams that played finals. Ordered by wins, then points difference; the league's own tiebreakers aren't applied.
Melbourne Tigers, who beat the Sydney Kings 3–0 in the Grand Final series.
The Sydney Kings, with a 26–6 record in the regular season.
Cortez Groves, with 24.0 points a game over 33 games.
Every champion since 1979: NBL champions. All seasons on file: the NBL archive.