| Competition: | 2. divisjon |
| Season: | 1989 |
| Winners: | Fyllingen Strømsgodset |
| Promoted: | Fyllingen Strømsgodset |
| Relegated: | Vard Vidar Clausenengen Drøbak/Frogn Harstad Bodø/Glimt |
| Matches: | 264 |
| Total Goals: | 789 |
| Prevseason: | 1988 |
| Nextseason: | 1990 |
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.[1] 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 Vålerengen in the promotion play-offs. Vålerengen won the qualification and remained in the Tippeligaen.
Vålerengen won the qualification round and remained in the Tippeligaen.