Demographics
BFS · 2025Women
8'666 51.5%
Men
8'164 48.5%
Children & youth (0–19)
2'766 16.4%
Swiss citizens
12'992 77.2%
Foreign residents
3'838 22.8%
Population density
2'680 pop./km²
0–19 · 2'766 · 16.4%20–64 · 10'373 · 61.6%65+ · 3'691 · 21.9%
Foreign residents 22.8%0%64.0%
Population change 2025: −17 (−0.1%) · 150 births · 179 deaths · net migration +1
STATPOP 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026 · swisstopo, retrieved 24.09.2026 · BEVNAT (Statistik der natürlichen Bevölkerungsbewegung) 2025 · Federal Statistical Office (FSO), retrieved 24.09.2026
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% YesDistrict Bezirk Solothurn: 34.0% Yes
34.0% YesNo 66.0%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Solothurn: 15.2% Yes
15.2% YesNo 84.8%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Solothurn: 41.2% Yes
41.2% YesNo 58.8%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Solothurn: 27.8% Yes
27.8% YesNo 72.2%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% YesDistrict Bezirk Solothurn: 73.0% Yes
73.0% YesNo 27.0%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% YesDistrict Bezirk Solothurn: 73.0% Yes
73.0% YesNo 27.0%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Solothurn: 67.2% Yes
67.2% YesNo 32.8%
08.03.2026Popular Initiative ‘For a fair energy and climate policy: Investing for prosperity, jobs and the environment (Climate Fund Initiative)’Federal● Rejected · 29.3% YesDistrict Bezirk Solothurn: 40.5% Yes
40.5% YesNo 59.5%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Solothurn: 26.1% Yes
26.1% YesNo 73.9%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Solothurn: 26.1% Yes
26.1% YesNo 73.9%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SP27.3% · strongest party
SP27.3%
FDP19.8%
GRÜNE17.9%
SVP12.4%
Mitte10.6%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier112%
Cantonal tax multiplier104%
112%SO range 65%145%
Tax rank 25 of 104 in canton SolothurnTax burden
Single, 100'000 CHF gross income
16'163 CHF(16.2%)
Rank 25 of 104 in the canton · 1363 of 2110 in Switzerland
Median canton 16'810 CHF · median Switzerland 15'290 CHF
Cheapest Kammersrohr 13'027 CHF · most expensive Bolken 18'375 CHF
100'000 CHF:16'163 CHF(~16.2%)
SolothurnCanton range SolothurnSwitzerland median
Show data table
| Gross income | Solothurn | Solothurn | Switzerland median |
|---|---|---|---|
| 40'000 | 7.7% | 6.1–8.8% | 5.4% |
| 50'000 | 9.9% | 7.9–11.4% | 7.8% |
| 60'000 | 11.8% | 9.4–13.5% | 10.5% |
| 70'000 | 13.2% | 10.5–15.1% | 11.9% |
| 80'000 | 14.3% | 11.5–16.3% | 13.1% |
| 90'000 | 15.2% | 12.2–17.3% | 14.1% |
| 100'000 | 16.2% | 13–18.4% | 15.3% |
| 110'000 | 17% | 13.8–19.3% | 16.3% |
| 120'000 | 17.7% | 14.4–20.1% | 17.2% |
| 130'000 | 18.5% | 15.1–20.9% | 18.1% |
| 140'000 | 19.3% | 15.7–21.8% | 19% |
| 150'000 | 20% | 16.4–22.5% | 19.7% |
| 175'000 | 21.6% | 17.8–24.3% | 21.6% |
| 200'000 | 23% | 19.1–25.8% | 23.2% |
| 225'000 | 24.2% | 20.1–27% | 24.6% |
| 250'000 | 25.2% | 21.1–28.2% | 25.8% |
| 275'000 | 26.1% | 21.9–29.1% | 26.8% |
| 300'000 | 26.8% | 22.5–29.8% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–20209.7 °C
Precipitation 1991–20201'177 mm
9.7 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
500 m
Mean elevation
439 m
Relief
76 m
Mean slope
2°
Flat share
91.2%
South-facing
5.5%
Above 2000 m
0.0%
Relief 76 m0 m3'847 m
Terrain figures cover the whole municipal territory (swisstopo swissALTIRegio) — not the settlement point. Slope and south-facing share are resolution-dependent and measured at 40 m.
swissALTIRegio 2026 · swisstopo, retrieved 28.08.2026
Roof potential
96.4 GWh/yr
Roofs + façades
129.3 GWh/yr
≈ households powered
21'400
Per inhabitant
5'728 kWh/yr
96 GWh/yr01'133 GWh/yr
BFE solar factsheet ↗Modelled roof and façade potential from the BFE solar model — the electricity these surfaces could produce, not installed capacity or what the municipality actually generates today. The household figure divides the roof potential by 4'500 kWh per year, ElCom’s reference household (consumption profile H4, a 5-room apartment).
Swiss Federal Office of Energy (SFOE), retrieved 24.09.2026
Electricity
ElCom · 2027Tariff H4
28.51 Rp./kWh
Energy
11.92 Rp./kWh
Grid usage
11.32 Rp./kWh
Levies + grid surcharge
3.7 Rp./kWh
28.51 Rp./kWh10.5645.88
Canton median 28.51 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator Regio Energie Solothurn
ElCom tariff comparison ↗How this is measured
Total household electricity price for ElCom consumption profile H4 — 4'500 kWh a year, a 5-room flat with electric stove and tumble dryer — standard product, excluding VAT, for the tariff year shown. Energy, grid usage, levies to public bodies and the federal grid surcharge are included. Canton and Swiss medians are ElCom's own published figures.
2027 · Federal Electricity Commission (ElCom), retrieved 12.09.2026
Health-insurance premiums
BAG · 2024Standard model, deductible 300606 CHF/mo
Ø premium in canton Solothurn424 CHF/mo
Estimate Switzerland 2026465.3 CHF/mo
Premiums are set not per municipality but per canton and premium region. Shown is the average adult premium paid in canton Solothurn (2024, BAG) — it applies canton-wide, not to any single location.
2024 · Federal Office of Public Health (FOPH), retrieved 12.09.2026
Housing
BFS · AREVacancy rate
1.24 %
Second homes
13.3 %
Avg. rooms
3.4
Dwellings
10'110
Built before 194637.7%
Built since 200112.0%
1.24 %0 %12 %
Vacancy rate from the BFS vacant-dwelling count (2025); building age and room count from the Buildings and Dwellings Statistics (2024). The average room count treats the ‘6 rooms or more’ class as 6, so it is a slight lower bound. The vacancy rate is volatile for small municipalities.
Buildings and Dwellings Statistics 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026 · Vacant dwellings survey 2025 · Federal Statistical Office (FSO), retrieved 24.09.2026 · Dwelling inventory and second-home share 2026 · Federal Office for Spatial Development (ARE), retrieved 24.09.2026
Economy
BFS · 2024Jobs
22'346
Workplaces
2'217
Services share
87.2 %
Jobs by sector: Primary 16 (0.1%) · Secondary 2'834 (12.7%) · Tertiary 19'496 (87.2%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
2
Organic share
50 %
Farmland
103 ha
Landwirtschaftliche Strukturerhebung 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026
Accessibility
ARE · NPVMNational Passenger Transport Model (NPVM) 2025 · Federal Office for Spatial Development (ARE), retrieved 24.09.2026
Municipality
Wikidata · CC0BFS municipality number2601
Head of governmentKurt Fluri · FDP.Die Liberalen
Websitestadt-solothurn.ch ↗
DistrictBezirk Solothurn
Wikidata · continuously updated, retrieved 24.09.2026
Largest municipalities16'830 #3 SO · #78 CHGrowing municipalities-0.1% #67 SO · #1481 CHShrinking municipalities-0.1% #38 SO · #628 CHJobs per resident1.33 #2 SO · #44 CHFamilies & children16.4% #99 SO · #1889 CHAge structure21.9% #58 SO · #873 CHWomen share51.5% #6 SO · #233 CHForeign residents22.8% #27 SO · #667 CHPopulation density2'680/km² #2 SO · #39 CHTax burden16'163 #25 SO · #1363 CHTaxes112% #25 SOWarmest municipalities9.7 °C #22 SO · #795 CHSunniest municipalities40% #97 SO · #1880 CHRainiest municipalities1'177 mm #23 SO · #750 CHVoter turnout56.9% #30 SO · #962 CHAgainst Switzerland16.7% #24 SO · #775 CHAligned with Switzerland83.3% #54 SO · #666 CHSVP strongholds12.4% #104 SO · #2062 CHSP strongholds27.3% #2 SO · #105 CHCentre strongholds10.6% #93 SO · #1144 CHFDP strongholds19.8% #31 SO · #468 CHGLP strongholds8.8% #5 SO · #465 CHGreen strongholds17.9% #2 SO · #39 CHLargest by area6.3 km² #48 SO · #1356 CHHighest municipalities435 m #80 SO · #1664 CHSecond homes13.3% #10 SO · #743 CHOrganic farming50% #3 SO · #117 CHBest-connected municipalities60 min #38 SO · #775 CHRemotest municipalities60 min #68 SO · #1335 CHHighest peaks500 m #85 SO · #1879 CHHighest-lying municipalities439 m #86 SO · #1802 CHGreatest vertical range76 m #83 SO · #1944 CHSteepest municipalities2° #93 SO · #2004 CHSolar potential96 GWh #3 SO · #89 CHSolar potential per capita5'728 kWh #99 SO · #1866 CHCheapest electricity28.51 Rp./kWh #52 SO · #1405 CHMost expensive electricity28.51 Rp./kWh #57 SO · #706 CH
Postal codes (1)
swisstopoLocalities
swisstopo · 1Nearby municipalities
swisstopo- What is the postal code of Solothurn?
- The postal code of Solothurn is 4500.
- What is the tax rate in Solothurn?
- The municipal tax multiplier of Solothurn is 112% (2026); canton SO levies 104%.
- How much tax do you pay in Solothurn?
- A single person without children pays about 16'163 CHF income tax in Solothurn on 100'000 CHF gross income (federal, cantonal, municipal), rank 25 of 104 in canton SO. Source: ESTV (2026).
- How many residents does Solothurn have?
- Solothurn has 16'830 residents (2025).
- How many foreign residents live in Solothurn?
- Solothurn has 3'838 foreign residents, a share of 22.8% (2025).
Map
OpenStreetMapSolothurn compared with
- Solothurn vs. Olten
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- Solothurn vs. Zuchwil
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- Solothurn vs. Trimbach
- Solothurn vs. Dornach
- Solothurn vs. Oensingen
- Solothurn vs. Balsthal
- Solothurn vs. Gerlafingen
- Solothurn vs. Olten
- Solothurn vs. Grenchen
- Solothurn vs. Zuchwil
- Solothurn vs. Biberist
- Solothurn vs. Derendingen
- Solothurn vs. Trimbach
- Solothurn vs. Dornach
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