| Competition: | Mestaruussarja |
| Season: | 1965 |
| Winners: | Haka Valkeakoski |
| Relegated: | Upon Pallo Lahti, ÅIFK Turku, TaPa Tampere |
| Prevseason: | 1964 |
| Nextseason: | 1966 |
Statistics of Mestaruussarja in the 1965 season.
It was contested by 12 teams, and Haka Valkeakoski won the championship.