The 2005–06 NBL season was the 28th season of competition since its establishment in 1979. A total of 11 teams contested the league.

Regular season

The 2005–06 regular season took place over 23 rounds between 2 September 2005 to 5 February 2006.

Round 1

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 2

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 3

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 4

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 5

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 6

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 7

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 8

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 9

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 10

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 11

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 12

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 13

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 14

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 15

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 16

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 17

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 18

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 19

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 20

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 21

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 22

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Round 23

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Ladder

The NBL tie-breaker system as outlined in the NBL Rules and Regulations states that in the case of an identical win–loss record, the results in games played between the teams will determine order of seeding. ''1Wollongong Hawks won Head-to-Head (2-1). '' ''2New Zealand Breakers won Head-to-Head (2-1). ''

Finals

Playoff bracket

Elimination Finals

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Semi-finals

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

Grand Final

!width=90| Date !width=180| Home !width=60| Score !width=180| Away !width=260| Venue !width=70| Crowd !width=70| Boxscore

All Star Game

Most Valuable Player

Awards

The MVP was awarded to Chris Anstey of the Melbourne Tigers. The Grand Final MVP was also awarded to Chris Anstey. The Coach of the Year went to Alan Westover of the Melbourne Tigers who coached the team to the title. The Rookie of the Year went to Mark Worthington of the Sydney Kings.

All NBL Team