The 1988–89 Primera División season was the second category of the Spanish basketball league system during the 1988–89 season.
It was the first played with the name of Primera División.
16 teams played this season.
A total of 16 teams contested the league, including 11 sides from the 1987–88 season, two promoted from the Segunda División and three Wild Cards.
Semifinal winners are promoted to Liga ACB.