1990 NBL season

The 1990 NBL season was the 12th season of competition since its establishment in 1979. With the addition of the Gold Coast Cougars a total of 14 teams contested the league.

Regular season
The 1990 regular season took place over 23 rounds between 30 March 1990 and 22 September 1990.

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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Round 23
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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.

''1Head-to-Head between Eastside Spectres and Brisbane Bullets (1-1). Eastside Spectres won For and Against (+7). ''

''2Head-to-Head between Melbourne Tigers and Perth Wildcats (1-1). Melbourne Tigers won For and Against (+11).''

3Sydney Kings won Head-to-Head (2-0).

Playoff bracket
There were two best of three Elimination finals, two best of three semifinals, and then best of three grand final series. All three of these finals were sudden death.

Elimination Finals
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Semifinals
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Grand Final
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NBL awards

 * Most Valuable Player: Derek Rucker, Brisbane Bullets
 * Most Valuable Player Grand Final: Ricky Grace, Perth Wildcats
 * Best Defensive Player: Leroy Loggins, Brisbane Bullets
 * Most Improved Player: Shane Heal, Geelong Supercats
 * Rookie of the Year: Justin Cass, Hobart Tassie Devils
 * Coach of the Year: Brian Kerle, Brisbane Bullets