1921 Országos Bajnokság I (men's water polo) was the 15th water polo championship in Hungary. There were five teams who played one round match for the title.
Final list #TeamMWDLG+G−P1.Ferencvárosi TC440025382.III. ker. TVE430111763.MAC420217744.MAFC4103121325.Nemzeti SC40041360
* M: Matches W: Win D: Drawn L: Lost G+: Goals earned G−: Goals got P: Point
OB I 1921Champions Ferencváros8th Title
Sources Gyarmati Dezső: Aranykor (Hérodotosz Könyvkiadó és Értékesítő Bt., Budapest, 2002.)