Melbourne United won the 2020–21 NBL championship, beating the Perth Wildcats 3–0 in the Grand Final series. Melbourne United finished top of the regular season at 28–8, so took the double; nine clubs played 36 games each.
Bryce Cotton (Perth Wildcats) led the league in scoring with 23.5 points a game. John Mooney led in rebounds (11.4 a game) and Josh Giddey in assists (7.4). The season's best single-game score was Casper Ware's 40 points for the Sydney Kings against the Cairns Taipans on 17 April 2021. The biggest win was the NZ Breakers' 44-point defeat of the Adelaide 36ers, 106–62.
| # | Team | P | W | L | +/- |
|---|---|---|---|---|---|
| 1 | Melbourne United | 36 | 28 | 8 | +233 |
| 2 | Perth Wildcats | 36 | 25 | 11 | +233 |
| 3 | Illawarra Hawks | 36 | 20 | 16 | +8 |
| 4 | South East Melbourne Phoenix | 36 | 19 | 17 | +93 |
| 5 | Sydney Kings | 36 | 19 | 17 | +25 |
| 6 | Brisbane Bullets | 36 | 18 | 18 | -70 |
| 7 | Adelaide 36ers | 36 | 13 | 23 | -171 |
| 8 | NZ Breakers | 36 | 12 | 24 | -84 |
| 9 | Cairns Taipans | 36 | 8 | 28 | -267 |
Marked: the teams that played finals. Ordered by wins, then points difference; the league's own tiebreakers aren't applied.
Melbourne United, who beat the Perth Wildcats 3–0 in the Grand Final series.
The Melbourne United, with a 28–8 record in the regular season.
Bryce Cotton, with 23.5 points a game over 32 games.
Every champion since 1979: NBL champions. All seasons on file: the NBL archive.