2020–21 Országos Bajnokság I (men's water polo)

The 2020–21 Országos Bajnokság I (also known as the E.ON Férfi OB I Bajnokság for sponsorship reasons, OB I in short), is going to be the 115th season of top-tier water polo in Hungary.

Team information
The following 16 clubs compete in the OB I during the 2020–21 season:

Schedule and results
In the table below the home teams are listed on the left and the away teams along the top.

Matches
Szolnoki Dózsa won the series 7–1 with points ratio, and advanced to the Finals. --