1920 Országos Bajnokság I (men's water polo) was the 14th water polo championship in Hungary. There were four teams who played one round match for the title.
Final list #TeamMWDLG+G−P1.Ferencvárosi TC330010262.III. ker. TVE32017443.MAFC31026724.Nemzeti SC30030100
* M: Matches W: Win D: Drawn L: Lost G+: Goals earned G−: Goals got P: Point
OB I 1920Champions Ferencváros7th Title
Sources Gyarmati Dezső: Aranykor (Hérodotosz Könyvkiadó és Értékesítő Bt., Budapest, 2002.)