2002–03 Országos Bajnokság I (men's water polo) was the 97th water polo championship in Hungary.
First stage #TeamMWDLG+G−P1.Domino-Bp. Honvéd221831260110392.Vasas SC-Plaket-Euroleasing221831256101393.BVSC-Brendon221642227131364.Ferencvárosi TC-VMAX221435196111315.Újpesti TE-Taxi2000221336194165296.Szeged-Beton VE221408185144287.OSC-British Knights227114147218158.ZF Hungária-Egri VK226115124207139.Kontavill-Szentesi VK2252151341961210.Szolnoki VSC2252151341961211.Ceglédi VSE-Geosaurus222218101214612.Kecskeméti VSC2212191122604
Championship Playoff Relegation Pld - Played; W - Won; L - Lost; PF - Points for; PA - Points against; Diff - Difference; Pts - Points.
Championship Playoff
Final 1st leg
2nd leg
Final standing
Qualified for the 2003–04 LEN Euroleague Qualified for the 2003–04 LEN Cup Relegation to the 2003–04 OB I/B
RankTeam Domino-BHSE Vasas-Plaket-Euroleasing BVSC-Brendon 4 FTC-VMAX 5 UTE-Taxi 2000 6 Szeged-Beton VE 7 OSC-British Knights 8 ZF Hungária-Egri VK 9 Kontavill-Szentesi VK 10 Ceglédi VSE-Geosaurus 11 Szolnoki VSC 12 Kecskeméti VSC
2002–03 OB I Champions Domino-BHSE3rd Title Attila Bárány, Miklós Bereczki, Péter Biros, Rajmund Fodor, Ottó FrikkIstván Gergely, Gergely Kiss, Olivér Kovács, Zoltán KovácsTamás Molnár, Sándor Sugár, Márton SzívósImre Tóth, Attila VáriHead coachIstván Kovács
Sources Magyar sportévkönyv 2004