2004–05 Országos Bajnokság I (men's water polo) was the 99th water polo championship in Hungary.

First stage #TeamMWDLG+G−P1.Domino-Bp. Honvéd222101306110422.TEVA-Vasas SC-Plaket221903234120383.Brendon-ZF-Egri VK221903236119384.Szeged-Beton VE221417173139295.Betonút-Ferencvárosi TC221408195123286.Újpesti TE-VB Leasing221309188181267.Legrand-Szentesi VK228113166205178.BVSC-Turbo227114169196159.OSC-British Knights2262141392271410.Szolnoki VSC2253141402061311.Neptun VSC222020107260412.Szent István Egyetem220022932600

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

Championship Playoff

OB I 2004–05Champions Honvéd5th Title

European competition Playoff

Relegation Playoff

Sources Magyar sportévkönyv 2006