1945 Országos Bajnokság I (men's water polo)

1945 Országos Bajnokság I (men's water polo) was the 39th water polo championship in Hungary. There were eight teams who played one-round match for the title.

Final list
 * M: Matches W: Win D: Drawn L: Lost G+: Goals earned G−: Goals got P: Point 

2. Class
1. NSC 14, 2. Tipográfia 11, 3. KaSE 10, 4. MTE 8, 5. Postás 6 point.