The electoral system in Sweden is proportional. Of the 349 seats in the national diet, the unicameral Riksdag, 310 are fixed constituency seats (Swedish: valkretsmandat) allocated to constituencies in relation to the number of people entitled to vote in each constituency (valkrets). The remaining 39 leveling seats (utjämningsmandat) are used to correct the deviations from proportional national distribution that may arise when allocating the fixed constituency seats. There is a constraint in the system that means that only a party that has received at least four per cent of the votes in the whole country participates in the distribution of seats. However, a party that has received at least twelve per cent of the votes in a constituency participates in the distribution of the fixed constituency seats in that constituency.[1][2]
^For the general election of 2010, See e.g.: Länet tappar ett mandat, Örnsköldsviks Allehanda, March 20, 2009.
^By the election in 2006, Heby Municipality was transferred from Västmanlands län to Uppsala län.
^Kristianstads län was abolished by the election of 1998. The constituency is now referred to as Skåne läns norra, and Skåne läns östra.
^Fyrstadskretsen and Malmöhus län were adjusted by the election of 1994.
^Västra Götalands län was created by the election of 1998. At the same time, Habo and Mullsjö Municipalities were transferred to Jönköpings län.
^The borders of electoral districts within the Västra Götaland county underwent minor modifications in 2018. See: Fördelning av fasta valkretsmandat 2018, Valmyndigheten.
^The constituency was named Kopparbergs län before the election of 1998.