The 2008–09 NBL season was the 31st season of competition since its establishment in 1979. A total of 10 teams contested the league.

2008–09 league participants

Preseason transactions

Mid-season transactions

Sponsors

Apparel

Regular season

The 2008-09 regular season took place over 22 rounds between 13 September 2008 and 14 February 2009.

Round 1

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Round 2

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Round 3

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Round 4

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Round 5

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Round 6

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Round 7

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Round 8

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Round 9

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Round 10

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Round 11

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Round 12

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Round 13

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Round 14

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Round 15

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Round 16

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Round 17

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Round 18

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Round 19

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Round 20

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Round 21

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Round 22

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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. ''1Perth Wildcats won Head-to-Head (3-1). '' ''23-way Head-to-Head between Wollongong Hawks (5-2), Sydney Spirit (3-4) and Cairns Taipans (2-4). ''

Finals

Playoff bracket

Elimination Finals

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Semi-finals

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Grand Final

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Player of the Week

Player of the Month

Coach of the Month

NBL awards

Television coverage

Radio coverage