| Competition: | OB I |
| Season: | 1925 |
| Winners: | Ferencváros |
| Prevseason: | 1924 |
| Nextseason: | 1926 |
1925 Országos Bajnokság I (men's water polo) was the 19th water polo championship in Hungary. There were seven teams who played one round match for the title.
| Team | M | W | D | L | G+ | G− | P | |
|---|---|---|---|---|---|---|---|---|
| 1. | Ferencvárosi TC | 6 | 6 | 0 | 0 | 54 | 7 | 12 |
| 2. | III. ker. TVE | 6 | 5 | 0 | 1 | 24 | 8 | 10 |
| 3. | Nemzeti SC | 6 | 3 | 1 | 2 | 30 | 21 | 7 |
| 4. | MAC | 6 | 2 | 2 | 2 | 15 | 15 | 6 |
| 5. | Vívó és Atlétikai Club | 6 | 2 | 0 | 4 | 14 | 36 | 4 |
| 6. | Újpesti TE | 6 | 1 | 1 | 4 | 10 | 28 | 3 |
| 7. | MAFC | 6 | 0 | 0 | 6 | 3 | 35 | 0 |
* M: Matches W: Win D: Drawn L: Lost G+: Goals earned G−: Goals got P: Point
1. MTK 4, 2. MUE 2, 3. MTE 0 pont.