1927 Országos Bajnokság I (men's water polo) was the 21st water polo championship in Hungary. There were seven teams who played one-round match for the title.

Final list #TeamMWDLG+G−P1.Ferencvárosi TC66004011122.III. ker. TVE65014310103.MTK6302241484.Újpesti TE6203281965.MAC6204142546.Nemzeti SC6105134327.MUE60066460

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

OB I 1927Champions Ferencváros12th Title

2. Class

1. OTE 8, 2. BSZKRT SE 4, 3. BEAC 4 pont, Postás and VAC cancelled their participation.

Countryside

1. MOVE Eger SE, 2. Szegedi UE, 3. Pannonia UE Sopron, 4. Tatatóvárosi AC.

Sources Gyarmati Dezső: Aranykor (Hérodotosz Könyvkiadó és Értékesítő Bt., Budapest, 2002.) Sport-évkönyv 1927