1984 Országos Bajnokság I (men's water polo) was the 78th water polo championship in Hungary.

First stage Group I #TeamMWDLG+G−P1.Vasas SC121110167107232.Bp. Spartacus12615116122133.Eger SE12444107112124.Tungsram SC12516109125115.Szentesi Vízmű12345112114106.Bp. Honvéd1232710812287.Medicor-OSC123181021197

Group II #TeamMWDLG+G−P1.BVSC12110114994222.Ferencvárosi TC12903123106183.Szolnoki Vízügy12615118102134.Újpesti Dózsa12525110102115.Tatabányai Bányász12606124122126.Szegedi EOL AK1221911513157.Hódmezővásárhelyi VSE121011981812

Championship Playoff Relegation Playoff Pld - Played; W - Won; L - Lost; PF - Points for; PA - Points against; Diff - Difference; Pts - Points.

Final round Semifinals

Final

OB I 1984Champions Vasas12th Title

3rd Place

5th Place

7th Place

9th Place

11.-14. Place

11th Place

13th Place

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