The 1989–90 OB I bajnokság season was the 53rd season of the OB I bajnokság, the top level of ice hockey in Hungary. Seven teams participated in the league, and Lehel SE Jaszbereny won the championship.
| Club | GP | W | T | L | Goals | Pts | ||
|---|---|---|---|---|---|---|---|---|
| 1. | 24 | 21 | 2 | 1 | 243:67 | 44 | ||
| 2. | 24 | 19 | 1 | 4 | 226:78 | 39 | ||
| 3. | 24 | 17 | 3 | 4 | 258:86 | 37 | ||
| 4. | 24 | 8 | 1 | 15 | 120:190 | 17 | ||
| 5. | 24 | 7 | 2 | 15 | 119:182 | 16 | ||
| 6. | 24 | 6 | 1 | 17 | 88:211 | 13 | ||
| 7. | 24 | 1 | 0 | 23 | 82:332 | 2 |