National apportionment of MP seats in the Riksdag explained

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 (Swedish: valkrets). The remaining 39 leveling seats (Swedish: 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]}

Apportionment of fixed constituency seats

Constituency	1970	1973	1976	1979	1982	1985	1988	1991	1994	1998	2002	2006	2010	2014	2018	2022
	31	29	27	26	26	25	25	25	25	26	27	27	28	29	29	29
	24	27	28	29	30	31	32	32	33	34	35	36	37	38	39	40
Uppsala län^[3]	8	8	9	9	9	9	9	9	10	10	10	11	11	11	11	12
	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
	15	15	15	15	15	15	15	15	15	15	15	14	14	14	14	14
	12	11	11	11	11	11	11	11	11	12	11	11	11	11	11	11	11
	6	6	6	6	7	6	6	6	6	6	6	6	6	6	6	6
	10	9	9	9	9	9	9	9	9	9	8	8	8	8	8	8
	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2
	6	6	6	6	6	6	6	6	6	6	5	5	5	5	5	5
Kristianstads län^[4]	10	10	10	11	11	11	11	11	11	-	-	-	-	-	-	-
Fyrstadskretsen^[5]	18	18	18	17	17	17	17	17	-	-	-	-	-	-	-	-
	10	10	10	11	11	11	11	11	-	-	-	-	-	-	-	-
Malmöhus läns norra	-	-	-	-	-	-	-	-	9	-	-	-	-	-	-	-
Malmöhus läns södra	-	-	-	-	-	-	-	-	11	-	-	-	-	-	-	-
	-	-	-	-	-	-	-	-	8	9	9	9	9	10	10	10
Skåne läns västra	-	-	-	-	-	-	-	-	-	9	9	9	9	9	9	9
Skåne läns södra	-	-	-	-	-	-	-	-	-	11	11	11	12	12	12	12
Skåne läns norra och östra	-	-	-	-	-	-	-	-	-	10	10	10	10	10	10	10
	7	8	8	9	9	9	9	9	9	10	10	10	10	10	10	10
	17	17	17	17	16	16	16	16	15	16	17	17	17	17	17	17
Bohuslän^[6]	10	10	10	10	10	11	11	11	11	-	-	-	-	-	-	-
Älvsborgs läns norra	9	9	9	9	9	9	9	9	9	-	-	-	-	-	-	-
Älvsborgs läns södra	7	7	7	7	7	7	6	7	6	-	-	-	-	-	-	-
	10	10	10	10	10	10	10	10	10	-	-	-	-	-	-	-
Västra Götalands läns västra^[7]	-	-	-	-	-	-	-	-	-	11	11	11	12	12	11	11
Västra Götalands läns norra	-	-	-	-	-	-	-	-	-	9	9	9	9	9	8	8
Västra Götalands läns södra	-	-	-	-	-	-	-	-	-	6	6	6	6	6	7	7
Västra Götalands läns östra	-	-	-	-	-	-	-	-	-	9	9	9	9	9	9	8
	11	11	11	11	11	11	11	10	10	10	10	10	9	9	9	9
	11	11	11	11	10	10	10	10	10	10	10	10	9	9	9	9
	9	9	9	9	9	9	9	9	9	9	9	8	8	8	8	8
Dalarnas län^[8]	11	11	11	11	11	11	11	11	11	10	10	10	10	9	9	9
	12	12	12	11	11	11	11	11	11	10	10	10	10	9	9	9
	11	11	11	10	10	10	10	10	10	9	9	9	8	8	8	8
	5	5	5	5	5	5	5	5	5	5	5	5	4	4	4	4
	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	8
	10	10	10	10	10	10	10	10	10	9	9	9	9	8	8	8
Total fixed constituency seats	310	310	310	310	310	310	310	310	310	310	310	310	310	310	310	310

Notes and References

1. See e.g.: SOU 2008:125 En reformerad grundlag (Constitutional Reform), Prime Ministers Office.
2. For the general election of 2010, See e.g.: Länet tappar ett mandat, Örnsköldsviks Allehanda, March 20, 2009.
3. By the election in 2006, Heby Municipality was transferred from Västmanlands län to Uppsala län.
4. Kristianstads län was abolished by the election of 1998. The constituency is now referred to as Skåne läns norra, and Skåne läns östra.
5. Fyrstadskretsen and Malmöhus län were adjusted by the election of 1994.
6. Västra Götalands län was created by the election of 1998. At the same time, Habo and Mullsjö Municipalities were transferred to Jönköpings län.
7. The borders of electoral districts within the Västra Götaland county underwent minor modifications in 2018. See: Fördelning av fasta valkretsmandat 2018, Valmyndigheten.
8. The constituency was named Kopparbergs län before the election of 1998.