1998–99 Országos Bajnokság I (men's water polo)
1998–99 Országos Bajnokság I was the 93rd water polo championship in Hungary.
Pld - Played; W - Won; L - Lost; PF - Points for; PA - Points against; Diff - Difference; Pts - Points.| Rank | Team |
| BVSC-Brendon |
| Ferencvárosi TC-Vitalin |
| Honvéd-Spartacus VE |
| Vasas-Plaket |
| 5 | Újpesti TE-Taxi2000 |
| 6 | ÚVMK Eger-Egervin |
| 7 | Kontavill-Szentesi VK |
| 8 | Szolnoki VSC |
| 9 | ELTE-BEAC-Intruder |
| 10 | Tabán Trafik-Szegedi VE |
| 11 | OSC |
| 12 | MAFC-P&P |
Play-off
Tabán Trafik-Szegedi VE – OSC 10–6, 3–7, 9–8, 4–6, 10–3
ELTE-BEAC-Intruder – Tabán Trafik-Szegedi VE 10–5, 8–4, 9–8
