The 1989 2. divisjon was a Norwegian second-tier football league season. The league was contested by 24 teams, divided into two groups; A and B. The winners of group A and B were promoted to the 1990 Tippeligaen.
The second placed teams met the 10th position finisher in the 1. divisjon in a qualification round where the winner was promoted to Tippeligaen. The bottom three teams inn both groups were relegated to the 3. divisjon.
Fyllingen won group A with 43 points and Strømsgodset won group B with 45 points. Both teams promoted to the 1990 Tippeligaen. The second-placed teams, Djerv 1919 and HamKam met VÃÂ¥lerengen in the promotion play-offs. VÃÂ¥lerengen won the qualification and remained in the Tippeligaen.
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VÃÂ¥lerengen won the qualification round and remained in the Tippeligaen.
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