Demographics
BFS · 2025Women
751 50.9%
Men
724 49.1%
Children & youth (0–19)
301 20.4%
Swiss citizens
1'205 81.7%
Foreign residents
270 18.3%
Population density
552 pop./km²
0–19 · 301 · 20.4%20–64 · 827 · 56.1%65+ · 347 · 23.5%
Foreign residents 18.3%0%64.0%
Population change 2025: −25 (−1.7%) · 13 births · 12 deaths · net migration −27
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 Dorneck: 29.8% Yes
29.1% YesNo 71.0%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Dorneck: 29.4% Yes
30.8% YesNo 69.2%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Dorneck: 51.2% Yes
54.7% YesNo 45.3%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Dorneck: 45.4% Yes
48.1% YesNo 51.9%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% YesDistrict Bezirk Dorneck: 62.8% Yes
60.8% YesNo 39.2%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% YesDistrict Bezirk Dorneck: 62.7% Yes
61.5% YesNo 38.5%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Dorneck: 52.7% Yes
50.8% YesNo 49.2%
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 Dorneck: 28.1% Yes
27.6% YesNo 72.4%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Dorneck: 37.0% Yes
33.4% YesNo 66.6%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Dorneck: 38.5% Yes
38.5% YesNo 61.5%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP26.9% · strongest party
SVP26.9%
Mitte19.1%
SP18.0%
FDP12.5%
GRÜNE10.7%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier110%
Cantonal tax multiplier104%
110%SO range 65%145%
Tax rank 20 of 104 in canton SolothurnTax burden
Single, 100'000 CHF gross income
16'019 CHF(16%)
Rank 20 of 104 in the canton · 1284 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:16'019 CHF(~16%)
WitterswilCanton range SolothurnSwitzerland median
Show data table
| Gross income | Witterswil | Solothurn | Switzerland median |
|---|---|---|---|
| 40'000 | 7.6% | 6.1–8.8% | 5.4% |
| 50'000 | 9.8% | 7.9–11.4% | 7.8% |
| 60'000 | 11.7% | 9.4–13.5% | 10.5% |
| 70'000 | 13.1% | 10.5–15.1% | 11.9% |
| 80'000 | 14.2% | 11.5–16.3% | 13.1% |
| 90'000 | 15% | 12.2–17.3% | 14.1% |
| 100'000 | 16% | 13–18.4% | 15.3% |
| 110'000 | 16.9% | 13.8–19.3% | 16.3% |
| 120'000 | 17.6% | 14.4–20.1% | 17.2% |
| 130'000 | 18.4% | 15.1–20.9% | 18.1% |
| 140'000 | 19.1% | 15.7–21.8% | 19% |
| 150'000 | 19.8% | 16.4–22.5% | 19.7% |
| 175'000 | 21.4% | 17.8–24.3% | 21.6% |
| 200'000 | 22.8% | 19.1–25.8% | 23.2% |
| 225'000 | 24% | 20.1–27% | 24.6% |
| 250'000 | 25.1% | 21.1–28.2% | 25.8% |
| 275'000 | 25.9% | 21.9–29.1% | 26.8% |
| 300'000 | 26.6% | 22.5–29.8% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–202010.7 °C
Precipitation 1991–2020932 mm
10.7 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
501 m
Mean elevation
361 m
Relief
179 m
Mean slope
6.5°
Flat share
61.9%
South-facing
5.6%
Above 2000 m
0.0%
Relief 179 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
12.3 GWh/yr
Roofs + façades
15.6 GWh/yr
≈ households powered
2'700
Per inhabitant
8'325 kWh/yr
12 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
31.74 Rp./kWh
Energy
13.45 Rp./kWh
Grid usage
13.78 Rp./kWh
Levies + grid surcharge
3.45 Rp./kWh
31.74 Rp./kWh10.5645.88
Canton median 28.51 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator Primeo Netz AG
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
0.45 %
Second homes
8.6 %
Avg. rooms
4.4
Dwellings
667
Built before 194613.5%
Built since 200118.3%
0.45 %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
570
Workplaces
86
Services share
57 %
Jobs by sector: Primary 50 (8.8%) · Secondary 195 (34.2%) · Tertiary 325 (57.0%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
4
Organic share
0 %
Farmland
104 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 · CC0Wikidata · continuously updated, retrieved 24.09.2026
Largest municipalities1'475 #55 SO · #1186 CHGrowing municipalities-1.7% #95 SO · #1946 CHShrinking municipalities-1.7% #10 SO · #161 CHJobs per resident0.39 #35 SO · #880 CHFamilies & children20.4% #37 SO · #1005 CHAge structure23.5% #35 SO · #583 CHWomen share50.9% #18 SO · #442 CHForeign residents18.3% #38 SO · #1011 CHPopulation density552/km² #28 SO · #470 CHTax burden16'019 #20 SO · #1284 CHTaxes110% #20 SOWarmest municipalities10.7 °C #3 SO · #155 CHSunniest municipalities42.1% #1 SO · #1112 CHRainiest municipalities932 mm #102 SO · #1864 CHVoter turnout58% #25 SO · #819 CHAgainst Switzerland5.9% #67 SO · #1402 CHAligned with Switzerland94.1% #4 SO · #53 CHSVP strongholds26.9% #86 SO · #1461 CHSP strongholds18% #27 SO · #622 CHCentre strongholds19.1% #49 SO · #579 CHFDP strongholds12.5% #86 SO · #1087 CHGLP strongholds7.4% #21 SO · #677 CHGreen strongholds10.7% #21 SO · #474 CHLargest by area2.7 km² #90 SO · #1920 CHHighest municipalities338 m #103 SO · #2031 CHSecond homes8.6% #66 SO · #1486 CHOrganic farming0% #72 SO · #1756 CHBest-connected municipalities33 min #1 SO · #126 CHRemotest municipalities33 min #104 SO · #1988 CHHighest peaks501 m #84 SO · #1874 CHHighest-lying municipalities361 m #104 SO · #2062 CHGreatest vertical range179 m #62 SO · #1448 CHSteepest municipalities6.5° #62 SO · #1317 CHSolar potential12 GWh #63 SO · #1399 CHSolar potential per capita8'325 kWh #67 SO · #1398 CHCheapest electricity31.74 Rp./kWh #94 SO · #1979 CHMost expensive electricity31.74 Rp./kWh #6 SO · #122 CH
Postal codes (2)
swisstopoLocalities
swisstopo · 2Nearby municipalities
swisstopo- What is the postal code of Witterswil?
- Witterswil has 2 postal codes: 4108, 4112.
- What is the tax rate in Witterswil?
- The municipal tax multiplier of Witterswil is 110% (2026); canton SO levies 104%.
- How much tax do you pay in Witterswil?
- A single person without children pays about 16'019 CHF income tax in Witterswil on 100'000 CHF gross income (federal, cantonal, municipal), rank 20 of 104 in canton SO. Source: ESTV (2026).
- How many residents does Witterswil have?
- Witterswil has 1'475 residents (2025).
- How many foreign residents live in Witterswil?
- Witterswil has 270 foreign residents, a share of 18.31% (2025).
Map
OpenStreetMapWitterswil compared with
- Witterswil vs. Olten
- Witterswil vs. Grenchen
- Witterswil vs. Solothurn
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- Witterswil vs. Olten
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