Mestaruussarja (Championship series) was the top division of Finnish football from 1930 to 1989.
During World War II years the league was sometimes cut short, abandoned or decided with cup competition instead.
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 Veikkausliiga.
The highest average attendance was 3,071 in 1967, a figure that is yet to be beaten by the current Veikkausliiga.