1904 Országos Bajnokság I (men's water polo) was the first water polo championship hold in Hungary. It was organised by the swimming division of the Hungarian Athletes' Association. There were four participating teams in the championship. There was only one round. All the matches were held in Császárfüddő during the first three weekends of September.

This article relies largely or entirely on a single source. (August 2012)

Best team of the previous years, MUE did not take part in the championship, because some swimmers were not satisfied with the leadership in connection with the Olympics held in St. Louis.

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

• Gyarmati Dezső: Aranykor (Hérodotosz Könyvkiadó és Értékesítő Bt., Budapest, 2002.)

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