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

''* M: Matches W: Win D: Drawn L: Lost G+: Goals earned G-: Goals got P: Point''

Sources

*Gyarmati Dezső: Aranykor (Hérodotosz Könyvkiadó és Értékesítő Bt., Budapest, 2002.) 1920 in water polo 1920 in Hungarian sport Seasons in Hungarian water polo competitions {{Hungary-waterpolo-competition-stub