The Országos Bajnokság I (English: Nationwide Championship; commonly abbreviated OB I) is the highest level hockey league in Hungary.
After the formation of the MOL Liga, the OB I returned to having only Hungarian teams.
The regular season coincides with the games played between the Hungarian teams in the MOL Liga, with these games also counting towards the national championship.
[1] As of the 2024-25 season, seven Hungarian teams contest the Hungarian championship.
After the regular season of Erste Liga, a direct elimination playoff is played between these seven teams where the pairings are based on the table of the Erste Liga.