Mestaruussarja (Championship series) was the top division of Finnish football from 1930 to 1989. It was replaced by Veikkausliiga in 1990.
In 1930 league format was used for the first time to decide Finnish champion. Before that from 1908 to 1929 the championship was decided with cup competition. The league was dominated by clubs from Helsinki, Turku and Vyborg. The first champion was HIFK from Helsinki. In 1935 four best clubs were from Helsinki and in 1934 and 1936 top three clubs also came from Helsinki. From 1908 to 1940 the championship went outside of Helsinki on only six occasions. Kuopio was the first inland city to get into the league when Pallotoverit were promoted in 1938. During World War I years the league was sometimes cut short, abandoned or decided with cup competition instead. In 1940s TUL clubs also participated.
The last Mestaruussarja season was 1989 and FC Kuusysi was crowned as the last champions. The new top level division was at first called SM-liiga and later renamed as Veikkausliiga.
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 teams obtained bonus points on the basis of their preliminary stage position. Those points are given in parentheses.
The 1946 season was the sixteenth completed season of Finnish Football League Championship, which culminated in a final between the winners of the Palloliiton league and the Työväen Urheiluliiton league.