Electoral districts of Finland

The boundaries of the electoral districts are based on the provinces in use from 1634 to 1997, and have remained largely the same since the first parliamentary election in 1907.

Some minor border changes between the regions of Finland have affected the electoral districts, but there have also been larger changes, detailed below.

After the Continuation War, the electoral districts of Eastern and Western Viipuri, which lost much of their territories to the Soviet Union, were united into the new electoral district of Kymi.

In 1954, Helsinki City was cut from the electoral district of Uusimaa Province.

The number of seats per electoral district are based on the 2015 parliamentary election.