The 1989–90 Norwegian 1. Divisjon season was the 51st season of ice hockey in Norway. Ten teams participated in the league, and Furuset IF won the championship.
Regular season
edit| Club | GP | W | T | L | GF–GA | Pts | |
|---|---|---|---|---|---|---|---|
| 1. | Furuset | 36 | 24 | 5 | 7 | 237:117 | 53 |
| 2. | Vålerenga | 36 | 24 | 3 | 9 | 232:137 | 51 |
| 3. | Sparta | 36 | 25 | 0 | 11 | 197:144 | 50 |
| 4. | Stjernen | 36 | 23 | 3 | 10 | 218:148 | 49 |
| 5. | Storhamar | 36 | 23 | 3 | 10 | 200:131 | 49 |
| 6. | Trondheim | 36 | 15 | 4 | 17 | 165:145 | 34 |
| 7. | Frisk Asker | 36 | 12 | 3 | 21 | 157:210 | 27 |
| 8. | Manglerud Star | 36 | 11 | 3 | 22 | 152:172 | 25 |
| 9. | Viking | 36 | 8 | 4 | 24 | 146:201 | 20 |
| 10. | Bergen/Djerv | 36 | 1 | 0 | 35 | 64:363 | 2 |
Playoffs
edit| Semi-finals | Final | |||||
| Furuset | 2 | |||||
| Stjernen | 1 | |||||
| Furuset | 3 | |||||
| Vålerenga | 0 | |||||
| Vålerenga | 2 | |||||
| Sparta | 1 | |||||
| Third place | ||||||
| Not played | ||||||