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Switzerland · Canton Code SO

Solothurn

SO

Capital: Solothurn

Total Population
289'872
Municipalities
104
Districts
10
Largest Municipality
19'265
Avg. Population per Municipality
2'787
BFS canton number
11

Relief © swisstopo · TINITALY · geoland.at · LGL · IGN · swissTLM3D · swissTLMRegio

Rankings for canton SolothurnPopulation & demographicsTaxesClimatePolitics & electionsGeographyMobility & public transportTerrain & reliefEnergy & electricityAll rankings →

Top municipalities in canton Solothurn

Population & demographics
Taxes
Climate
Politics & elections
Geography
Mobility & public transport
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 · 2024

Permanent resident population aged 15+, 2024

No affiliation42.3% 102'871
Roman Catholic25.4% 61'869
Reformed Protestant15.5% 37'771
Muslim communities8.3% 20'306
Other Christian5.8% 14'106
Other religions1.8% 4'319
Not stated0.8% 1'933

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 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026

Taxes

ESTV · 2026

Income tax in the 5 cheapest and 5 most expensive municipalities of Solothurn at CHF 100'000 gross income.

Lowest tax

  1. Kammersrohr13'027
  2. Feldbrunnen-St. Niklaus13'227
  3. Däniken14'104
  4. Härkingen14'628
  5. Dornach14'808

Highest tax

  1. Bolken18'375
  2. Trimbach18'061
  3. Zullwil17'974
  4. Holderbank17'497
  5. Nuglar-St. Pantaleon17'431

Median Solothurn: CHF 16'810

Total income tax (federal, cantonal, municipal and personal tax) for a single person without children, no church affiliation, on CHF 100'000 gross employment income, tax year 2026. Because the same household is computed everywhere, the franc amounts are comparable across Switzerland — the tax multiplier is not.

Tax burden · Full ranking →

Energy & electricity

ElCom · BFE · 2027
Median tariff H4
28.51 Rp./kWh
Swiss median H4
26.53 Rp./kWh
Cheapest municipality
21.15 Rp./kWh
Egerkingen
Most expensive municipality
45.88 Rp./kWh
Kestenholz
Roof solar potential
2'358 GWh/yr
Solar potential per capita
8'133 kWh/yr
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.

2027 · Federal Electricity Commission (ElCom), retrieved 12.09.2026

Health-insurance premiums

BAG · 2024
Ø premium canton
424 CHF/mo
Estimate Switzerland
465.3 CHF/mo
Rank in comparison
18. of 26 cantons
Cheapest canton
293 CHF/mo
Appenzell Innerrhoden
Most expensive canton
539 CHF/mo
Geneva
Compare all premiums in canton Solothurn →Premiums explained →

Average adult premium actually paid in the canton (2024, BAG health-insurance statistics) — the mean across all regions, models and deductibles, not the cheapest offer. The 2026 figure is BAG's forward national mean premium.

Districts of the canton of Solothurn

10 Districts — municipalities and residents per unit
Bezirk Olten
15 Municipalities · 59'428 Residents
Bezirk Wasseramt
17 Municipalities · 54'436 Residents
Bezirk Lebern
15 Municipalities · 48'743 Residents
Bezirk Gösgen
10 Municipalities · 26'303 Residents
Bezirk Gäu
8 Municipalities · 23'418 Residents
Bezirk Dorneck
11 Municipalities · 21'261 Residents
Bezirk Solothurn
1 Municipalities · 16'830 Residents
Bezirk Thal
8 Municipalities · 15'651 Residents
Bezirk Thierstein
12 Municipalities · 15'529 Residents
Bezirk Bucheggberg
7 Municipalities · 8'273 Residents

Municipalities in Canton

swisstopo · 104
104 municipalities

Aedermannsdorf

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

Aeschi

SO
Bezirk Wasseramt
Population:1'342
Postal codes:2
33654556

Balm bei Günsberg

SO
Bezirk Lebern
Population:213
Postal codes:2
45244525

Balsthal

SO
Bezirk Thal
Population:6'622
Postal codes:2
47104717

Bärschwil

SO
Bezirk Thierstein
Population:806
Postal codes:2
42524253

Bättwil

SO
Bezirk Dorneck
Population:1'185
Postal codes:2
41054112

Beinwil

SO
Bezirk Thierstein
Population:248
Postal codes:3
282742294719

Bellach

SO
Bezirk Lebern
Population:5'632
Postal codes:2
45004512

Bettlach

SO
Bezirk Lebern
Population:4'935
Postal codes:1
2544

Biberist

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

Biezwil

SO
Bezirk Bucheggberg
Population:345
Postal codes:1
4585

Bolken

SO
Bezirk Wasseramt
Population:579
Postal codes:1
4556

Boningen

SO
Bezirk Olten
Population:816
Postal codes:2
46184663

Breitenbach

SO
Bezirk Thierstein
Population:4'440
Postal codes:2
42264232

Buchegg

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

Büren

SO
Bezirk Dorneck
Population:1'060
Postal codes:1
4413

Büsserach

SO
Bezirk Thierstein
Population:2'473
Postal codes:1
4227

Däniken

SO
Bezirk Olten
Population:3'108
Postal codes:1
4658

Deitingen

SO
Bezirk Wasseramt
Population:2'409
Postal codes:2
45424543

Derendingen

SO
Bezirk Wasseramt
Population:7'219
Postal codes:2
45524553

Dornach

SO
Bezirk Dorneck
Population:6'898
Postal codes:1
4143

Drei Höfe

SO
Bezirk Wasseramt
Population:727
Postal codes:1
4558

Dulliken

SO
Bezirk Olten
Population:5'489
Postal codes:2
46575746

Egerkingen

SO
Bezirk Gäu
Population:4'365
Postal codes:1
4622

Eppenberg-Wöschnau

SO
Bezirk Olten
Population:336
Postal codes:1
5012

Erlinsbach

SO
Bezirk Gösgen
Population:3'761
Postal codes:2
50155017

Erschwil

SO
Bezirk Thierstein
Population:996
Postal codes:2
42284233

Etziken

SO
Bezirk Wasseramt
Population:1'093
Postal codes:1
4554

Fehren

SO
Bezirk Thierstein
Population:619
Postal codes:1
4232

Feldbrunnen-St. Niklaus

SO
Bezirk Lebern
Population:1'068
Postal codes:1
4532

Flumenthal

SO
Bezirk Lebern
Population:1'023
Postal codes:2
45344543

Fulenbach

SO
Bezirk Olten
Population:1'841
Postal codes:1
4629

Gempen

SO
Bezirk Dorneck
Population:919
Postal codes:1
4145

Gerlafingen

SO
Bezirk Wasseramt
Population:5'859
Postal codes:1
4563

Grenchen

SO
Bezirk Lebern
Population:18'973
Postal codes:1
2540

Gretzenbach

SO
Bezirk Olten
Population:2'825
Postal codes:2
46585014

Grindel

SO
Bezirk Thierstein
Population:508
Postal codes:1
4247

Günsberg

SO
Bezirk Lebern
Population:1'169
Postal codes:2
45244715

Gunzgen

SO
Bezirk Olten
Population:1'783
Postal codes:3
461446164617

Hägendorf

SO
Bezirk Olten
Population:5'343
Postal codes:3
443846144615

Härkingen

SO
Bezirk Gäu
Population:1'763
Postal codes:1
4624

Hauenstein-Ifenthal

SO
Bezirk Gösgen
Population:348
Postal codes:1
4633

Herbetswil

SO
Bezirk Thal
Population:617
Postal codes:2
47154716

Himmelried

SO
Bezirk Thierstein
Population:974
Postal codes:2
42044206

Hochwald

SO
Bezirk Dorneck
Population:1'278
Postal codes:1
4146

Hofstetten-Flüh

SO
Bezirk Dorneck
Population:3'410
Postal codes:3
411241144115

Holderbank

SO
Bezirk Thal
Population:779
Postal codes:2
44384718

Horriwil

SO
Bezirk Wasseramt
Population:940
Postal codes:1
4557

Hubersdorf

SO
Bezirk Lebern
Population:727
Postal codes:1
4535

Hüniken

SO
Bezirk Wasseramt
Population:160
Postal codes:1
4554

Kammersrohr

SO
Bezirk Lebern
Population:32
Postal codes:1
4535

Kappel

SO
Bezirk Olten
Population:3'591
Postal codes:2
46164618

Kestenholz

SO
Bezirk Gäu
Population:1'888
Postal codes:1
4703

Kienberg

SO
Bezirk Gösgen
Population:526
Postal codes:1
4468

Kleinlützel

SO
Bezirk Thierstein
Population:1'190
Postal codes:2
28144245

Kriegstetten

SO
Bezirk Wasseramt
Population:1'456
Postal codes:2
45634566

Langendorf

SO
Bezirk Lebern
Population:3'983
Postal codes:2
45134522

Laupersdorf

SO
Bezirk Thal
Population:1'916
Postal codes:2
47124717

Lohn-Ammannsegg

SO
Bezirk Wasseramt
Population:2'940
Postal codes:1
4573

Lommiswil

SO
Bezirk Lebern
Population:1'615
Postal codes:2
45124514

Lostorf

SO
Bezirk Gösgen
Population:4'113
Postal codes:2
46344654

Lüsslingen-Nennigkofen

SO
Bezirk Bucheggberg
Population:1'131
Postal codes:1
4574

Luterbach

SO
Bezirk Wasseramt
Population:3'756
Postal codes:2
45424552

Lüterkofen-Ichertswil

SO
Bezirk Bucheggberg
Population:923
Postal codes:1
4571

Matzendorf

SO
Bezirk Thal
Population:1'439
Postal codes:2
47134717

Meltingen

SO
Bezirk Thierstein
Population:623
Postal codes:2
42294233

Messen

SO
Bezirk Bucheggberg
Population:1'506
Postal codes:3
325433074588

Metzerlen-Mariastein

SO
Bezirk Dorneck
Population:970
Postal codes:2
41154116

Mümliswil-Ramiswil

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

Neuendorf

SO
Bezirk Gäu
Population:2'412
Postal codes:2
46224623

Niederbuchsiten

SO
Bezirk Gäu
Population:1'369
Postal codes:1
4626

Niedergösgen

SO
Bezirk Gösgen
Population:4'297
Postal codes:1
5013

Nuglar-St. Pantaleon

SO
Bezirk Dorneck
Population:1'580
Postal codes:2
44124421

Nunningen

SO
Bezirk Thierstein
Population:1'948
Postal codes:2
42044208

Oberbuchsiten

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

Oberdorf

SO
Bezirk Lebern
Population:1'806
Postal codes:2
45154522

Obergerlafingen

SO
Bezirk Wasseramt
Population:1'232
Postal codes:2
45634564

Obergösgen

SO
Bezirk Gösgen
Population:2'553
Postal codes:2
46524653

Oensingen

SO
Bezirk Gäu
Population:6'766
Postal codes:2
47024710

Olten

SO
Bezirk Olten
Population:19'265
Postal codes:3
460046124663

Recherswil

SO
Bezirk Wasseramt
Population:2'260
Postal codes:1
4565

Rickenbach

SO
Bezirk Olten
Population:1'208
Postal codes:1
4613

Riedholz

SO
Bezirk Lebern
Population:2'319
Postal codes:2
45234533

Rodersdorf

SO
Bezirk Dorneck
Population:1'398
Postal codes:1
4118

Rüttenen

SO
Bezirk Lebern
Population:1'498
Postal codes:3
450045224532

Schnottwil

SO
Bezirk Bucheggberg
Population:1'159
Postal codes:1
3253

Schönenwerd

SO
Bezirk Olten
Population:5'437
Postal codes:1
5012

Seewen

SO
Bezirk Dorneck
Population:1'088
Postal codes:2
42044206

Selzach

SO
Bezirk Lebern
Population:3'750
Postal codes:3
254545124574

Solothurn

SO
Bezirk Solothurn
Population:16'830
Postal codes:1
4500

Starrkirch-Wil

SO
Bezirk Olten
Population:2'020
Postal codes:3
460046564657

Stüsslingen

SO
Bezirk Gösgen
Population:1'265
Postal codes:1
4655

Subingen

SO
Bezirk Wasseramt
Population:3'311
Postal codes:1
4553

Trimbach

SO
Bezirk Gösgen
Population:6'928
Postal codes:3
460046324634

Unterramsern

SO
Bezirk Bucheggberg
Population:230
Postal codes:1
4588

Walterswil

SO
Bezirk Olten
Population:768
Postal codes:1
5746

Wangen bei Olten

SO
Bezirk Olten
Population:5'598
Postal codes:2
46124632

Welschenrohr-Gänsbrunnen

SO
Bezirk Thal
Population:1'199
Postal codes:1
4716

Winznau

SO
Bezirk Gösgen
Population:2'061
Postal codes:1
4652

Wisen

SO
Bezirk Gösgen
Population:451
Postal codes:1
4634

Witterswil

SO
Bezirk Dorneck
Population:1'475
Postal codes:2
41084112

Wolfwil

SO
Bezirk Gäu
Population:2'473
Postal codes:1
4628

Zuchwil

SO
Bezirk Wasseramt
Population:9'622
Postal codes:2
45004528

Zullwil

SO
Bezirk Thierstein
Population:704
Postal codes:2
42334234

Vote results for Solothurn

BFS
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% Yes
27.5% YesNo 72.5%
27.09.2026Popular Initiative 'For food security – through increased sustainable domestic production, more plant-based food and clean drinking water (Food Initiative)'Federal● Rejected · 27.5% Yes
25.8% YesNo 74.2%
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%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% Yes
50.7% YesNo 49.3%
14.06.2026Amendment to the Civilian Service ActFederal● 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%
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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