Electoral system for national legislature

Constitution, 2000-03-01 (last amended 2011)

Section 25:  The Representatives shall be elected by a direct, proportional and secret vote. Every citizen who has the right to vote has equal suffrage in the elections. For the parliamentary elections, the country shall be divided, on the basis of the number of Finnish citizens, into at least twelve and at most eighteen constituencies. In addition, the Åland Islands shall form their own constituency for the election of one Representative. […]