| Competition: | Női OB I |
| Season: | 2018–19 |
| Winners: | UVSE-Hunguest Hotels (5th title) |
| League Topscorer: | Rita Keszthelyi (69 goals) |
| Prevseason: | 2017-18 |
| Nextseason: | 2019-20 |
The 2018–19 Országos Bajnokság I was the 36th season of the Országos Bajnokság I, Hungary's premier Water polo league.
The following 9 clubs compete in the OB I during the 2018–19 season:
| bgcolor=#DD0000 align="center" colspan="17" | OB I | ||||
| Team | City | Pool | Founded | Colours | |
|---|---|---|---|---|---|
| BVSC | Budapest (XIV. ker) | Szőnyi úti uszoda | 1911 | ||
| Dunaújváros | Dunaújváros | Fabó Éva Sportuszoda | 1989 | ||
| Eger | Eger | Bitskey Aladár uszoda | 1910 | ||
| FTC | Budapest (IX. ker) | Népligeti uszoda | 1899 | ||
| Honvéd | Budapest (XIX. ker) | Kőér utcai uszoda | 1950 | ||
| Szeged | Szeged | Ligetfürdő | 1993 | ||
| Szentes | Szentes | Dr. Rébeli Szabó József Sportuszoda | 1934 | ||
| Tatabánya | Tatabánya | Tatabányai Sportuszoda | 1992 | ||
| UVSE | Budapest (IV. ker) | Hajós Alfréd Sportuszoda | 2008 |
In the table below the home teams are listed on the left and the away teams along the top.
Teams in bold won the playoff series. Numbers to the left of each team indicate the team's original playoff seeding. Numbers to the right indicate the score of each playoff game.
| Team 1 | Points | Team 2 | Games in the season | Game 1 | Game 2 | Game 3 | ||
|---|---|---|---|---|---|---|---|---|
| BVSC-Zugló Diapolo (3) | 9–0 | 18-6 | 15-5 | 14-4 | ／ | ／ | ||
| FTC-Telekom (4) | 9–0 | 14-10 | 6-5 | 15-8 | ／ | ／ |
Higher ranked team hosted Game 1 plus Game 3 if necessary. The lower ranked hosted Game 2.
| Team 1 | Team 2 | Game 1 | Game 2 | Game 3 | ||
|---|---|---|---|---|---|---|
| UVSE-Hunguest Hotels | 2–0 | 17-8 | 11-8 | ／ | ||
| DUE-Maarsk Graphics | 2–1 | 11-10 | 7-10 | 11-10 (p) |
Higher ranked team hosted Game 1 and Game 3 plus Game 5 if necessary. The lower ranked hosted Game 2 plus Game 4 if necessary.
--------UVSE-Hunguest Hotels won the Final series 3–0.
Higher ranked team hosted Game 1 plus Game 3 if necessary. The lower ranked hosted Game 2.
--------BVSC-Zugló Diapolo won the Third place.
Higher ranked team hosted Game 1 plus Game 3 if necessary. The lower ranked hosted Game 2.
Higher ranked team hosted Game 1 plus Game 3 if necessary. The lower ranked hosted Game 2.
| Team 1 | Team 2 | Game 1 | Game 2 | Game 3 | ||
|---|---|---|---|---|---|---|
| Hungerit Szentes (6) | 2–0 | 10-4 | 15-7 | ／ | ||
| ZF-Eger (5) | 2–1 | 9-7 | 13-14 (p) | 16-10 |
| Rank | Player | Team | Goals | |
|---|---|---|---|---|
| 1 |  Rita Keszthelyi | UVSE | 69 | |
| 2 | Dorottya Szilágyi | Eger | 56 | |
| 3 | Gréta Gurisatti | Dunaújváros | 53 | |
| 4 | Barbara Bujka | FTC | 52 | |
| 5 | Dominika Lengyel | Szeged | 50 | |
| 6 | Szonja Kuna | BVSC | 47 | |
| Dóra Tóth-Csabai | FTC | 47 | ||
| 8 | Krisztina Garda | Dunaújváros | 46 | |
| 9 | Vanda Vályi | Dunaújváros | 45 | |
| 10 | Dóra Leimeter | BVSC | 43 |
| Rank | Player | Team | Rating | |
|---|---|---|---|---|
| 1 | Rita Keszthelyi | UVSE | 83.1 | |
| 2 | Szonja Kuna | BVSC | 62.7 | |
| 3 | Gréta Gurisatti | Dunaújváros | 60.2 | |
| 4 | Barbara Bujka | FTC | 56.4 | |
| 5 | Dorottya Szilágyi | Eger | 54.5 | |
| 6 | Anikó Gyöngyössy | BVSC | 50.6 | |
| 7 | Vanda Vályi | Dunaújváros | 48.9 | |
| 8 | Kamilla Faragó | UVSE | 46.7 | |
| 9 | Dóra Tóth-Csabai | FTC | 43.7 | |
| 10 | Lilla Ráski | Eger | 40.9 |
| Pos. | County (megye) | № of teams | Teams | |
|---|---|---|---|---|
| 1 | Budapest (capital) | 4 | BVSC, FTC, Honvéd and UVSE | |
| 2 | Csongrád | 2 | Szegedi NVE and Szentesi VK | |
| 3 | Fejér | 1 | Dunaújvárosi FVE | |
| Heves | 1 | Egri VK | ||
| Komárom-Esztergom | 1 | Tatabányai VSE | ||