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Switzerland · Canton Code SO

Solothurn

SO

Capital: Solothurn

Total Population
289'872
Municipalities
104
Largest Municipality
19'265
Avg. Population per Municipality
2'787

Relief © swisstopo · TINITALY · geoland.at · LGL · IGN

Rankings for canton SolothurnPopulation & demographicsTaxesClimatePolitics & electionsGeographyTerrain & reliefEnergy & electricityAll rankings →

Top municipalities in canton Solothurn

Population & demographics
Taxes
Climate
Politics & elections
Geography
Terrain & relief
Energy & electricity

Top municipalities by population

BFS
#1Olten
19'265
#2Grenchen
18'973
#3Solothurn
16'830
#4Zuchwil
9'622
#5Biberist
9'531
#6Derendingen
7'219
#7Trimbach
6'928
#8Dornach
6'898
#9Oensingen
6'766
#10Balsthal
6'622

Religion

FSO · structural survey · 2022

Permanent resident population aged 15+, 2022

No affiliation38.7% 91'710
Roman Catholic28.8% 68'324
Reformed Protestant16.8% 39'946
Muslim communities7.7% 18'359
Other Christian5.4% 12'801
Other religions1.6% 3'784
Not stated0.8% 1'954
Jewish community0.1% 201

Sample survey (structural survey) with 95% confidence intervals; shares can sum slightly under 100% (suppressed small values). Religious affiliation has not been collected per municipality since the 2000 census — the canton is the finest level available.

Structural Survey 2022 · Federal Statistical Office (FSO), retrieved 31.08.2026

Energy & electricity

ElCom · BFE · 2026
Median tariff H4
30.42 Rp./kWh
Swiss median H4
27.7 Rp./kWh
Roof solar potential
2'358 GWh/yr
Cheapest municipalityEgerkingen 23.47 Rp./kWh
Most expensive municipalityKestenholz 43.61 Rp./kWh
All energy rankings →

Medians are ElCom's published household electricity prices for consumption profile H4 (4'500 kWh a year, standard product, excl. VAT) for the tariff year shown. The solar figure sums the BFE modelled roof potential of the 104 municipalities with a model — what roofs could generate, not what is installed.

2026 · Federal Electricity Commission (ElCom), retrieved 28.08.2026

Municipalities in Canton

swisstopo · 104
104 municipalities

Aedermannsdorf

SO
Population:607
Postal codes:4
274747144717+1 more

Aeschi

SO
Population:1'342
Postal codes:2
33654556

Balm bei Günsberg

SO
Population:213
Postal codes:2
45244525

Balsthal

SO
Population:6'622
Postal codes:2
47104717

Bärschwil

SO
Population:806
Postal codes:2
42524253

Bättwil

SO
Population:1'185
Postal codes:2
41054112

Beinwil

SO
Population:248
Postal codes:3
282742294719

Bellach

SO
Population:5'632
Postal codes:2
45004512

Bettlach

SO
Population:4'935
Postal codes:1
2544

Biberist

SO
Population:9'531
Postal codes:4
450045284562+1 more

Biezwil

SO
Population:345
Postal codes:1
4585

Bolken

SO
Population:579
Postal codes:1
4556

Boningen

SO
Population:816
Postal codes:2
46184663

Breitenbach

SO
Population:4'440
Postal codes:2
42264232

Buchegg

SO
Population:2'979
Postal codes:11
457645774578+8 more

Büren

SO
Population:1'060
Postal codes:1
4413

Büsserach

SO
Population:2'473
Postal codes:1
4227

Däniken

SO
Population:3'108
Postal codes:1
4658

Deitingen

SO
Population:2'409
Postal codes:2
45424543

Derendingen

SO
Population:7'219
Postal codes:2
45524553

Dornach

SO
Population:6'898
Postal codes:1
4143

Drei Höfe

SO
Population:727
Postal codes:1
4558

Dulliken

SO
Population:5'489
Postal codes:2
46575746

Egerkingen

SO
Population:4'365
Postal codes:1
4622

Eppenberg-Wöschnau

SO
Population:336
Postal codes:1
5012

Erlinsbach

SO
Population:3'761
Postal codes:2
50155017

Erschwil

SO
Population:996
Postal codes:2
42284233

Etziken

SO
Population:1'093
Postal codes:1
4554

Fehren

SO
Population:619
Postal codes:1
4232

Feldbrunnen-St. Niklaus

SO
Population:1'068
Postal codes:1
4532

Flumenthal

SO
Population:1'023
Postal codes:2
45344543

Fulenbach

SO
Population:1'841
Postal codes:1
4629

Gempen

SO
Population:919
Postal codes:1
4145

Gerlafingen

SO
Population:5'859
Postal codes:1
4563

Grenchen

SO
Population:18'973
Postal codes:1
2540

Gretzenbach

SO
Population:2'825
Postal codes:2
46585014

Grindel

SO
Population:508
Postal codes:1
4247

Günsberg

SO
Population:1'169
Postal codes:2
45244715

Gunzgen

SO
Population:1'783
Postal codes:3
461446164617

Hägendorf

SO
Population:5'343
Postal codes:3
443846144615

Härkingen

SO
Population:1'763
Postal codes:1
4624

Hauenstein-Ifenthal

SO
Population:348
Postal codes:1
4633

Herbetswil

SO
Population:617
Postal codes:2
47154716

Himmelried

SO
Population:974
Postal codes:2
42044206

Hochwald

SO
Population:1'278
Postal codes:1
4146

Hofstetten-Flüh

SO
Population:3'410
Postal codes:3
411241144115

Holderbank

SO
Population:779
Postal codes:2
44384718

Horriwil

SO
Population:940
Postal codes:1
4557

Hubersdorf

SO
Population:727
Postal codes:1
4535

Hüniken

SO
Population:160
Postal codes:1
4554

Kammersrohr

SO
Population:32
Postal codes:1
4535

Kappel

SO
Population:3'591
Postal codes:2
46164618

Kestenholz

SO
Population:1'888
Postal codes:1
4703

Kienberg

SO
Population:526
Postal codes:1
4468

Kleinlützel

SO
Population:1'190
Postal codes:2
28144245

Kriegstetten

SO
Population:1'456
Postal codes:2
45634566

Langendorf

SO
Population:3'983
Postal codes:2
45134522

Laupersdorf

SO
Population:1'916
Postal codes:2
47124717

Lohn-Ammannsegg

SO
Population:2'940
Postal codes:1
4573

Lommiswil

SO
Population:1'615
Postal codes:2
45124514

Lostorf

SO
Population:4'113
Postal codes:2
46344654

Lüsslingen-Nennigkofen

SO
Population:1'131
Postal codes:1
4574

Luterbach

SO
Population:3'756
Postal codes:2
45424552

Lüterkofen-Ichertswil

SO
Population:923
Postal codes:1
4571

Matzendorf

SO
Population:1'439
Postal codes:2
47134717

Meltingen

SO
Population:623
Postal codes:2
42294233

Messen

SO
Population:1'506
Postal codes:3
325433074588

Metzerlen-Mariastein

SO
Population:970
Postal codes:2
41154116

Mümliswil-Ramiswil

SO
Population:2'472
Postal codes:4
422944184717+1 more

Neuendorf

SO
Population:2'412
Postal codes:2
46224623

Niederbuchsiten

SO
Population:1'369
Postal codes:1
4626

Niedergösgen

SO
Population:4'297
Postal codes:1
5013

Nuglar-St. Pantaleon

SO
Population:1'580
Postal codes:2
44124421

Nunningen

SO
Population:1'948
Postal codes:2
42044208

Oberbuchsiten

SO
Population:2'382
Postal codes:4
462346254626+1 more

Oberdorf

SO
Population:1'806
Postal codes:2
45154522

Obergerlafingen

SO
Population:1'232
Postal codes:2
45634564

Obergösgen

SO
Population:2'553
Postal codes:2
46524653

Oensingen

SO
Population:6'766
Postal codes:2
47024710

Olten

SO
Population:19'265
Postal codes:3
460046124663

Recherswil

SO
Population:2'260
Postal codes:1
4565

Rickenbach

SO
Population:1'208
Postal codes:1
4613

Riedholz

SO
Population:2'319
Postal codes:2
45234533

Rodersdorf

SO
Population:1'398
Postal codes:1
4118

Rüttenen

SO
Population:1'498
Postal codes:3
450045224532

Schnottwil

SO
Population:1'159
Postal codes:1
3253

Schönenwerd

SO
Population:5'437
Postal codes:1
5012

Seewen

SO
Population:1'088
Postal codes:2
42044206

Selzach

SO
Population:3'750
Postal codes:3
254545124574

Solothurn

SO
Population:16'830
Postal codes:1
4500

Starrkirch-Wil

SO
Population:2'020
Postal codes:3
460046564657

Stüsslingen

SO
Population:1'265
Postal codes:1
4655

Subingen

SO
Population:3'311
Postal codes:1
4553

Trimbach

SO
Population:6'928
Postal codes:3
460046324634

Unterramsern

SO
Population:230
Postal codes:1
4588

Walterswil

SO
Population:768
Postal codes:1
5746

Wangen bei Olten

SO
Population:5'598
Postal codes:2
46124632

Welschenrohr-Gänsbrunnen

SO
Population:1'199
Postal codes:1
4716

Winznau

SO
Population:2'061
Postal codes:1
4652

Wisen

SO
Population:451
Postal codes:1
4634

Witterswil

SO
Population:1'475
Postal codes:2
41084112

Wolfwil

SO
Population:2'473
Postal codes:1
4628

Zuchwil

SO
Population:9'622
Postal codes:2
45004528

Zullwil

SO
Population:704
Postal codes:2
42334234

Vote results for Solothurn

BFS
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% Yes
58.7% YesNo 41.3%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% Yes
58.6% YesNo 41.4%
14.06.2026Volksinitiative «Keine 10-Millionen-Schweiz! (Nachhaltigkeitsinitiative)»Federal● Rejected · 45.2% Yes
50.7% YesNo 49.3%
14.06.2026Änderung des Bundesgesetzes über den zivilen Ersatzdienst (Zivildienstgesetz, ZDG)Federal● Accepted · 52.5% Yes
54.9% YesNo 45.1%
08.03.2026Neubau «KAPO-Stützpunkt» in Oensingen; Bewilligung eines VerpflichtungskreditesCantonal SO● Accepted · 61.0% Yes
61.0% YesNo 39.0%
08.03.2026Änderung des Sozialgesetzes (SG); Umsetzung Massnahmenplan 2024 DDI: Finanzierung der erlassenen Mindestbeiträge an die AHV durch die EinwohnergemeindenCantonal SO● Rejected · 35.9% Yes
35.9% YesNo 64.1%
08.03.2026Änderung des Sozialgesetzes (SG); Umsetzung Massnahmenplan 2024 DDI: Weiterverrechnung der Verwaltungskosten für die Durchführung der Alimentenhilfe an die EinwohnergemeindenCantonal SO● Rejected · 34.1% Yes
34.1% YesNo 65.9%
08.03.2026Teilrevision des Sozialgesetzes (SG); Anhebung der FamilienzulagenCantonal SO● Accepted · 59.1% Yes
59.1% YesNo 40.9%
08.03.2026Volksinitiative «Ja zu einer unabhängigen, freien Schweizer Währung mit Münzen oder Banknoten (Bargeld ist Freiheit)»Federal● Rejected · 45.6% Yes
45.1% YesNo 54.9%
08.03.2026Bundesbeschluss über die schweizerische Währung und die Bargeldversorgung (Gegenvorschlag zur Bargeldinitiative)Federal● Accepted · 73.4% Yes
72.5% YesNo 27.5%
All votes in Solothurn →

Frequently asked questions

How many municipalities does canton Solothurn have?
Canton Solothurn has 104 municipalities. The largest are Olten, Grenchen, Solothurn.
What is the population of canton Solothurn?
Canton Solothurn has about 289'872 residents.
What is the capital of canton Solothurn?
The capital of canton Solothurn is Solothurn.

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