The 1986–87 OB I bajnokság season was the 50th season of the OB I bajnokság, the top level of ice hockey in Hungary. Seven teams participated in the league, and Ujpesti Dozsa SC won the championship.
| Club | GP | W | T | L | Goals | Pts | |
|---|---|---|---|---|---|---|---|
| 1. | Újpesti Dózsa SC | 12 | 12 | 0 | 0 | 113:31 | 24 |
| 2. | Ferencvárosi TC | 12 | 10 | 0 | 2 | 87:38 | 20 |
| 3. | Alba Volán Székesfehérvár | 12 | 8 | 0 | 4 | 61:43 | 16 |
| 4. | Miskolci Kinizsi | 12 | 6 | 0 | 6 | 47:43 | 12 |
| 5. | Dunaújvárosi Kohász | 12 | 2 | 1 | 9 | 35:72 | 5 |
| 6. | KSI Budapest | 12 | 2 | 0 | 10 | 36:95 | 4 |
| 7. | Lehel Jászberény | 12 | 1 | 1 | 10 | 32:89 | 3 |
| Club | GP | W | T | L | Goals | Pts | |
|---|---|---|---|---|---|---|---|
| 1. | Újpesti Dózsa SC | 24 | 23 | 1 | 0 | 95:38 | 47 |
| 2. | Ferencvárosi TC | 24 | 16 | 1 | 7 | 48:43 | 33 |
| 3. | Alba Volán Székesfehérvár | 24 | 14 | 0 | 10 | 63:51 | 28 |
| 4. | Miskolci Kinizsi | 24 | 6 | 0 | 18 | 26:100 | 12 |
| Club | GP | W | T | L | Goals | Pts | |
|---|---|---|---|---|---|---|---|
| 5. | Lehel Jászberény | 20 | 6 | 2 | 12 | 28:26 | 14 |
| 6. | Dunaújvárosi Kohász | 20 | 5 | 2 | 13 | 25:30 | 12 |
| 7. | KSI Budapest | 20 | 4 | 2 | 14 | 25:22 | 10 |
The 1938–39 OB I bajnokság season was the third season of the OB I bajnokság, the top level of ice hockey in Hungary. Three teams participated in the league, and BKE Budapest won the championship.
The 1939–40 OB I bajnokság season was the fourth season of the OB I bajnokság, the top level of ice hockey in Hungary. Three teams participated in the league, and BKE Budapest won the championship.
The 1945–46 OB I bajnokság season was the ninth season of the OB I bajnokság, the top level of ice hockey in Hungary. 10 teams participated in the league, and BKE Budapest won the championship.
The 1946–47 OB I bajnokság season was the 10th season of the OB I bajnokság, the top level of ice hockey in Hungary. Five teams participated in the league, and MTK Budapest won the championship.
The 1951–52 OB I bajnokság season was the 15th season of the OB I bajnokság, the top level of ice hockey in Hungary. Six teams participated in the league, and Voros Meteor Budapest won the championship.
The 1953–54 OB I bajnokság season was the 17th season of the OB I bajnokság, the top level of ice hockey in Hungary. Seven teams participated in the league, and Postas Budapest won the championship.
The 1957–58 OB I bajnokság season was the 21st season of the OB I bajnokság, the top level of ice hockey in Hungary. Five teams participated in the league, and Ujpesti Dozsa SC won the championship.
The 1960–61 OB I bajnokság season was the 24th season of the OB I bajnokság, the top level of ice hockey in Hungary. Six teams participated in the league, and Ferencvarosi TC won the championship.
The 1962–63 OB I bajnokság season was the 26th season of the OB I bajnokság, the top level of ice hockey in Hungary. Six teams participated in the league, and Voros Meteor Budapest won the championship.
The 1963–64 OB I bajnokság season was the 27th 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.
The 1964–65 OB I bajnokság season was the 28th season of the OB I bajnokság, the top level of ice hockey in Hungary. Eight teams participated in the league, and Ujpesti Dozsa SC won the championship.
The 1970–71 OB I bajnokság season was the 34th season of the OB I bajnokság, the top level of ice hockey in Hungary. Six teams participated in the league, and Ferencvarosi TC won the championship.
The 1973–74 OB I bajnokság season was the 37th season of the OB I bajnokság, the top level of ice hockey in Hungary. Four teams participated in the league, and Ferencvarosi TC won the championship.
The 1975–76 OB I bajnokság season was the 39th season of the OB I bajnokság, the top level of ice hockey in Hungary. Four teams participated in the league, and Ferencvarosi TC won the championship.
The 1979–80 OB I bajnokság season was the 43rd season of the OB I bajnokság, the top level of ice hockey in Hungary. Four teams participated in the league, and Ferencvarosi TC won the championship.
The 1982–83 OB I bajnokság season was the 46th season of the OB I bajnokság, the top level of ice hockey in Hungary. Three teams participated in the league, and Ujpesti Dozsa SC won the championship.
The 2013–14 OB I bajnoksag season is the 77th season of the OB I bajnoksag, the top level of ice hockey in Hungary. The league proper was not contested this season, as four of the top Hungarian teams competed in the multi-national MOL Liga. The top-ranked Hungarian team in the league was crowned national champions. Dab.Docler was recognized as Hungarian champion this year.
The 2021–22 Országos Bajnokság I, is going to be the 116th season of top-tier water polo in Hungary. A total of fourteen teams contest this season's league, which began on 8 September 2021 and will conclude on 18 May 2022.
The 2022–23 Országos Bajnokság I, is going to be the 117th season of top-tier water polo in Hungary. A total of fourteen teams contest this season's league, which began on 8 October 2022 and will conclude on 18 May 2023.