Demographics
BFS · 2025Women
163 47.2%
Men
182 52.8%
Children & youth (0–19)
70 20.3%
Swiss citizens
328 95.1%
Foreign residents
17 4.9%
Population density
83 pop./km²
0–19 · 70 · 20.3%20–64 · 183 · 53.0%65+ · 92 · 26.7%
Foreign residents 4.9%0%64.0%
Population change 2025: +0 (+0%) · 2 births · 1 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 Bucheggberg: 22.3% Yes
15.4% YesNo 84.6%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Bucheggberg: 28.6% Yes
33.8% YesNo 66.2%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Bucheggberg: 56.7% Yes
69.1% YesNo 30.9%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Bucheggberg: 53.4% Yes
62.7% YesNo 37.3%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% YesDistrict Bezirk Bucheggberg: 55.1% Yes
44.6% YesNo 55.4%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% YesDistrict Bezirk Bucheggberg: 55.3% Yes
44.6% YesNo 55.4%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Bucheggberg: 51.2% Yes
48.8% YesNo 51.2%
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 Bucheggberg: 21.6% Yes
14.8% YesNo 85.2%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Bucheggberg: 40.6% Yes
46.2% YesNo 53.8%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Bucheggberg: 39.7% Yes
43.9% YesNo 56.1%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP38.0% · strongest party
SVP38.0%
FDP32.6%
SP7.9%
Mitte7.7%
GRÜNE6.0%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier125%
Cantonal tax multiplier104%
125%SO range 65%145%
Tax rank 82 of 104 in canton SolothurnTax burden
Single, 100'000 CHF gross income
17'030 CHF(17%)
Rank 75 of 104 in the canton · 1857 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:17'030 CHF(~17%)
BiezwilCanton range SolothurnSwitzerland median
Show data table
| Gross income | Biezwil | Solothurn | Switzerland median |
|---|---|---|---|
| 40'000 | 8.1% | 6.1–8.8% | 5.4% |
| 50'000 | 10.5% | 7.9–11.4% | 7.8% |
| 60'000 | 12.4% | 9.4–13.5% | 10.5% |
| 70'000 | 13.9% | 10.5–15.1% | 11.9% |
| 80'000 | 15.1% | 11.5–16.3% | 13.1% |
| 90'000 | 16% | 12.2–17.3% | 14.1% |
| 100'000 | 17% | 13–18.4% | 15.3% |
| 110'000 | 17.9% | 13.8–19.3% | 16.3% |
| 120'000 | 18.6% | 14.4–20.1% | 17.2% |
| 130'000 | 19.5% | 15.1–20.9% | 18.1% |
| 140'000 | 20.3% | 15.7–21.8% | 19% |
| 150'000 | 21% | 16.4–22.5% | 19.7% |
| 175'000 | 22.7% | 17.8–24.3% | 21.6% |
| 200'000 | 24.1% | 19.1–25.8% | 23.2% |
| 225'000 | 25.3% | 20.1–27% | 24.6% |
| 250'000 | 26.4% | 21.1–28.2% | 25.8% |
| 275'000 | 27.3% | 21.9–29.1% | 26.8% |
| 300'000 | 28% | 22.5–29.8% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–20209.1 °C
Precipitation 1991–20201'147 mm
9.1 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
671 m
Mean elevation
600 m
Relief
140 m
Mean slope
5.8°
Flat share
46.1%
South-facing
8.2%
Above 2000 m
0.0%
Relief 140 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
5.3 GWh/yr
Roofs + façades
6.7 GWh/yr
≈ households powered
1'200
Per inhabitant
15'362 kWh/yr
5 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
33.73 Rp./kWh
Energy
12.9 Rp./kWh
Grid usage
16.84 Rp./kWh
Levies + grid surcharge
2.3 Rp./kWh
33.73 Rp./kWh10.5645.88
Canton median 28.51 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator GEBNET 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 %
Second homes
12.7 %
Avg. rooms
4.4
Dwellings
166
Built before 194646.4%
Built since 200117.5%
0 %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
82
Workplaces
21
Services share
29.3 %
Jobs by sector: Primary 29 (35.4%) · Secondary 29 (35.4%) · Tertiary 24 (29.3%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
9
Organic share
22.2 %
Farmland
210 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 municipalities345 #98 SO · #1927 CHGrowing municipalities0% #61 SO · #1407 CHShrinking municipalities0% #41 SO · #681 CHJobs per resident0.24 #70 SO · #1577 CHFamilies & children20.3% #39 SO · #1032 CHAge structure26.7% #10 SO · #255 CHWomen share47.2% #98 SO · #1985 CHForeign residents4.9% #102 SO · #2015 CHPopulation density83/km² #92 SO · #1575 CHTax burden17'030 #76 SO · #1858 CHTaxes125% #82 SOWarmest municipalities9.1 °C #73 SO · #1307 CHSunniest municipalities40.5% #45 SO · #1605 CHRainiest municipalities1'147 mm #34 SO · #843 CHVoter turnout61.7% #11 SO · #447 CHSVP strongholds38% #21 SO · #769 CHSP strongholds7.9% #84 SO · #1702 CHCentre strongholds7.7% #102 SO · #1479 CHFDP strongholds32.6% #3 SO · #53 CHGLP strongholds3.5% #88 SO · #1490 CHGreen strongholds6% #65 SO · #1327 CHLargest by area4.2 km² #78 SO · #1679 CHHighest municipalities586 m #18 SO · #865 CHSecond homes12.7% #17 SO · #823 CHOrganic farming22.2% #23 SO · #542 CHBest-connected municipalities69 min #72 SO · #1054 CHRemotest municipalities69 min #32 SO · #1056 CHHighest peaks671 m #54 SO · #1288 CHHighest-lying municipalities600 m #32 SO · #1009 CHGreatest vertical range140 m #68 SO · #1640 CHSteepest municipalities5.8° #67 SO · #1424 CHSolar potential5 GWh #94 SO · #1883 CHSolar potential per capita15'362 kWh #6 SO · #386 CHCheapest electricity33.73 Rp./kWh #102 SO · #2052 CHMost expensive electricity33.73 Rp./kWh #3 SO · #55 CH
Postal codes (1)
swisstopoLocalities
swisstopo · 1Nearby municipalities
swisstopo- What is the postal code of Biezwil?
- The postal code of Biezwil is 4585.
- What is the tax rate in Biezwil?
- The municipal tax multiplier of Biezwil is 125% (2026); canton SO levies 104%.
- How much tax do you pay in Biezwil?
- A single person without children pays about 17'030 CHF income tax in Biezwil on 100'000 CHF gross income (federal, cantonal, municipal), rank 75 of 104 in canton SO. Source: ESTV (2026).
- How many residents does Biezwil have?
- Biezwil has 345 residents (2025).
- How many foreign residents live in Biezwil?
- Biezwil has 17 foreign residents, a share of 4.93% (2025).
Map
OpenStreetMapBiezwil compared with
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