The 1989 NBL Finals was the championship series of the 1989 season of Australia's National Basketball League (NBL) and the conclusion of the season's playoffs.
The North Melbourne Giants defeated the Canberra Cannons in two games (2-0) for their first NBL championship.
The 1989 National Basketball League Finals started on 20 September and concluded on 20 October.
As the two top teams at the end of the regular season, the North Melbourne Giants and Canberra Cannons both qualified for home court advantage during the Semi-finals.
North Melbourne's 55 point win over Perth in game 3 of their semi-final series would have been the record winning margin for an NBL Semi-final breaking the previous record of 48 held by Adelaide for their 151–103 win over Newcastle in 1985, except that on the same day Canberra beat Sydney by 60 points in the other semi final series.