The league was contested by 12 teams, with Malmö FF winning the league and IFK Norrköping winning the Swedish championship after the play-offs.
The 1989 Allsvenskan play-offs was the eighth edition of the competition.
League runners-up IFK Norrköping won the competition and the Swedish championship after defeating Allsvenskan champions Malmö FF.
The champion was determined by a final in best of three matches in contrast to previous years.
IFK Norrköping won 2–1 in matches.