| Competition: | Mestaruussarja |
| Season: | 1980 |
| Prevseason: | 1979 |
| Nextseason: | 1981 |
Statistics of Mestaruussarja in the 1980 season.
Preliminary Stage is performed in 12 teams, and higher 8 teams go into Championship Group. Lower 4 teams fought in promotion/relegation group with higher 4 teams of Ykkönen.
OPS Oulu won the championship.
The points were halved (rounded upwards in uneven cases) after the preliminary stage.
The teams obtained bonus points on the basis of their preliminary stage position.