| Competition: | OB I |
| Season: | 1926 |
| Winners: | Ferencváros |
| Prevseason: | 1925 |
| Nextseason: | 1927 |
1926 Országos Bajnokság I (men's water polo) was the 20th water polo championship in Hungary. There were six teams who played one round match for the title.
| Team | M | W | D | L | G+ | G− | P | |
|---|---|---|---|---|---|---|---|---|
| 1. | Ferencvárosi TC | 5 | 5 | 0 | 0 | 34 | 3 | 10 |
| 2. | III. ker. TVE | 5 | 4 | 0 | 1 | 22 | 10 | 8 |
| 3. | MTK | 5 | 3 | 0 | 2 | 11 | 16 | 6 |
| 4. | Nemzeti SC | 5 | 2 | 0 | 3 | 13 | 19 | 4 |
| 5. | MAC | 5 | 1 | 0 | 4 | 6 | 21 | 2 |
| 6. | Újpesti TE | 5 | 0 | 0 | 5 | 4 | 21 | 0 |
* M: Matches W: Win D: Drawn L: Lost G+: Goals earned G−: Goals got P: Point
1. MUE 12, 2. BSZKRT SE 10, 3. OTE 8, 4. BEAC 6, 5. Bankszövetség 4, 6. Postás 2, 7. BAK 0 points.
1. MOVE Eger SE, 2. Szegedi UE, 3. Bajai SE, 4. Tatatóvárosi AC