Országos Bajnokság I (women's water polo)

The Women's Water Polo First League (Női Országos Bajnokság I) is the premier Hungarian championship for women's water polo clubs.

First held in 1984, it is currently contested by ten teams.

[1] The champion takes part in the Champions' Cup.

[2] The teams in Bold play in the 2018-19 season of OB I.

The following table lists the Hungarian water polo champions by counties of Hungary.