1990–91 OB I bajnoksag season

The 1990–91 OB I bajnokság season was the 54th season of the OB I bajnokság, the top level of ice hockey in Hungary. Eight teams participated in the league, and Ferencvarosi TC won the championship.

7th place

 * Újpesti Dózsa SC II - Sziketherm HK Dunaújváros 2:0 (4:3, 5:3)

5th place

 * Miskolci HC - Nepstadion NSzE Budapest 2:0 (7:3, 8:4)

3rd place

 * Újpesti Dózsa SC - Alba Volán Székesfehérvár 3:0 (6:3, 10:2, 9:3)

Final

 * Ferencvárosi TC - Lehel SE Jászberény 4:2 (0:3, 18:3, 3:2, 2:6, 7:2, 3:2)