2003–04 Országos Bajnokság I (men's water polo) was the 98th water polo championship in Hungary.

First stage #TeamMWDLG+G−P1.Vasas SC-Plaket-Euroleasing22220028597442.Domino-Bp. Honvéd222002300119403.BVSC-Brendon221705214112344.Jégcsillag-Ferencvárosi TC221516224138315.Újpesti TE-Taxi2000221246198169286.Szeged-Beton VE2211110147198237.ZF Hungária-Egri VK227411135182188.OSC-British Knights226412153208169.Legrand-Szentesi VK2242161452211010.Szent István Egyetem223217128260811.Szolnoki VSC223217142239812.Ceglédi VSE-Geosaurus2212191122404

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 2003–04Champions Honvéd4th Title

European competition Playoff

Relegation Playoff

Sources Magyar sportévkönyv 2005