Demographics
BFS · 2025Women
3'262 48.2%
Men
3'504 51.8%
Children & youth (0–19)
1'414 20.9%
Swiss citizens
4'036 59.7%
Foreign residents
2'730 40.4%
Population density
559 pop./km²
0–19 · 1'414 · 20.9%20–64 · 4'202 · 62.1%65+ · 1'150 · 17.0%
Foreign residents 40.4%0%64.0%
Population change 2025: −51 (−0.8%) · 65 births · 41 deaths · net migration −77
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 Gäu: 19.4% Yes
23.5% YesNo 76.5%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Gäu: 32.5% Yes
36.1% YesNo 63.9%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Gäu: 64.0% Yes
60.5% YesNo 39.5%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Gäu: 62.1% Yes
62.4% YesNo 37.6%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% YesDistrict Bezirk Gäu: 50.2% Yes
50.5% YesNo 49.5%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% YesDistrict Bezirk Gäu: 50.6% Yes
51.1% YesNo 48.9%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Gäu: 48.6% Yes
50.7% YesNo 49.3%
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 Gäu: 16.6% Yes
19.7% YesNo 80.3%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Gäu: 46.6% Yes
47.4% YesNo 52.6%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Gäu: 43.2% Yes
43.4% YesNo 56.6%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP34.1% · strongest party
SVP34.1%
Mitte26.0%
FDP14.6%
SP12.9%
GRÜNE5.6%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier116%
Cantonal tax multiplier104%
116%SO range 65%145%
Tax rank 36 of 104 in canton SolothurnTax burden
Single, 100'000 CHF gross income
16'410 CHF(16.4%)
Rank 35 of 104 in the canton · 1517 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:16'410 CHF(~16.4%)
OensingenCanton range SolothurnSwitzerland median
Show data table
| Gross income | Oensingen | Solothurn | Switzerland median |
|---|---|---|---|
| 40'000 | 7.7% | 6.1–8.8% | 5.4% |
| 50'000 | 10.1% | 7.9–11.4% | 7.8% |
| 60'000 | 11.9% | 9.4–13.5% | 10.5% |
| 70'000 | 13.4% | 10.5–15.1% | 11.9% |
| 80'000 | 14.5% | 11.5–16.3% | 13.1% |
| 90'000 | 15.4% | 12.2–17.3% | 14.1% |
| 100'000 | 16.4% | 13–18.4% | 15.3% |
| 110'000 | 17.3% | 13.8–19.3% | 16.3% |
| 120'000 | 18% | 14.4–20.1% | 17.2% |
| 130'000 | 18.8% | 15.1–20.9% | 18.1% |
| 140'000 | 19.6% | 15.7–21.8% | 19% |
| 150'000 | 20.3% | 16.4–22.5% | 19.7% |
| 175'000 | 21.9% | 17.8–24.3% | 21.6% |
| 200'000 | 23.3% | 19.1–25.8% | 23.2% |
| 225'000 | 24.5% | 20.1–27% | 24.6% |
| 250'000 | 25.6% | 21.1–28.2% | 25.8% |
| 275'000 | 26.5% | 21.9–29.1% | 26.8% |
| 300'000 | 27.2% | 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 °C
Precipitation 1991–20201'125 mm
9 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
1'020 m
Mean elevation
534 m
Relief
589 m
Mean slope
9.4°
Flat share
53.9%
South-facing
27.8%
Above 2000 m
0.0%
Relief 589 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
66.1 GWh/yr
Roofs + façades
82.6 GWh/yr
≈ households powered
14'700
Per inhabitant
9'775 kWh/yr
66 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
25.59 Rp./kWh
Energy
7.97 Rp./kWh
Grid usage
11.91 Rp./kWh
Levies + grid surcharge
3.8 Rp./kWh
25.59 Rp./kWh10.5645.88
Canton median 28.51 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator BKW Energie 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
1.2 %
Second homes
6.9 %
Avg. rooms
3.7
Dwellings
3'250
Built before 194616.4%
Built since 200136.2%
1.2 %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
5'791
Workplaces
479
Services share
63.7 %
Jobs by sector: Primary 56 (1.0%) · Secondary 2'047 (35.3%) · Tertiary 3'688 (63.7%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
10
Organic share
20 %
Farmland
262 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 municipalities6'766 #9 SO · #298 CHGrowing municipalities-0.8% #84 SO · #1732 CHShrinking municipalities-0.8% #21 SO · #378 CHJobs per resident0.86 #7 SO · #128 CHFamilies & children20.9% #21 SO · #843 CHAge structure17% #102 SO · #1771 CHWomen share48.2% #87 SO · #1816 CHForeign residents40.4% #6 SO · #77 CHPopulation density559/km² #27 SO · #460 CHTax burden16'410 #36 SO · #1518 CHTaxes116% #36 SOWarmest municipalities9 °C #79 SO · #1365 CHSunniest municipalities40.1% #76 SO · #1801 CHRainiest municipalities1'125 mm #43 SO · #954 CHVoter turnout48.1% #92 SO · #1915 CHAgainst Switzerland17.6% #21 SO · #691 CHAligned with Switzerland82.4% #56 SO · #740 CHSVP strongholds34.1% #38 SO · #1031 CHSP strongholds12.9% #58 SO · #1175 CHCentre strongholds26% #26 SO · #329 CHFDP strongholds14.6% #61 SO · #860 CHGLP strongholds4.6% #74 SO · #1285 CHGreen strongholds5.6% #74 SO · #1422 CHLargest by area12.1 km² #17 SO · #808 CHHighest municipalities465 m #58 SO · #1418 CHSecond homes6.9% #93 SO · #1832 CHOrganic farming20% #31 SO · #624 CHBest-connected municipalities72 min #82 SO · #1150 CHRemotest municipalities72 min #22 SO · #959 CHHighest peaks1'020 m #20 SO · #716 CHHighest-lying municipalities534 m #45 SO · #1290 CHGreatest vertical range589 m #19 SO · #623 CHSteepest municipalities9.4° #48 SO · #976 CHSolar potential66 GWh #5 SO · #195 CHSolar potential per capita9'775 kWh #47 SO · #1104 CHCheapest electricity25.59 Rp./kWh #23 SO · #714 CHMost expensive electricity25.59 Rp./kWh #80 SO · #1577 CH
Postal codes (2)
swisstopoLocalities
swisstopo · 2Nearby municipalities
swisstopo- What is the postal code of Oensingen?
- Oensingen has 2 postal codes: 4702, 4710.
- What is the tax rate in Oensingen?
- The municipal tax multiplier of Oensingen is 116% (2026); canton SO levies 104%.
- How much tax do you pay in Oensingen?
- A single person without children pays about 16'410 CHF income tax in Oensingen on 100'000 CHF gross income (federal, cantonal, municipal), rank 35 of 104 in canton SO. Source: ESTV (2026).
- How many residents does Oensingen have?
- Oensingen has 6'766 residents (2025).
- How many foreign residents live in Oensingen?
- Oensingen has 2'730 foreign residents, a share of 40.35% (2025).
Map
OpenStreetMapOensingen compared with
- Oensingen vs. Olten
- Oensingen vs. Grenchen
- Oensingen vs. Solothurn
- Oensingen vs. Zuchwil
- Oensingen vs. Biberist
- Oensingen vs. Derendingen
- Oensingen vs. Trimbach
- Oensingen vs. Dornach
- Oensingen vs. Balsthal
- Oensingen vs. Gerlafingen
- Oensingen vs. Olten
- Oensingen vs. Grenchen
- Oensingen vs. Solothurn
- Oensingen vs. Zuchwil
- Oensingen vs. Biberist
- Oensingen vs. Derendingen
- Oensingen vs. Trimbach
- Oensingen vs. Dornach
- Oensingen vs. Balsthal
- Oensingen vs. Gerlafingen
- Oensingen vs. Baden
- Oensingen vs. Schwende-Rüte
- Oensingen vs. Herisau
- Oensingen vs. Bern
- Oensingen vs. Allschwil
- Oensingen vs. Basel
- Oensingen vs. Fribourg
- Oensingen vs. Geneva
- Oensingen vs. Glarus Nord
- Oensingen vs. Chur
- Oensingen vs. Delémont
- Oensingen vs. Lucerne
- Oensingen vs. Neuchâtel
- Oensingen vs. Stans
- Oensingen vs. Sarnen
- Oensingen vs. St. Gallen
- Oensingen vs. Schaffhausen
- Oensingen vs. Freienbach
- Oensingen vs. Frauenfeld
- Oensingen vs. Lugano
- Oensingen vs. Altdorf
- Oensingen vs. Lausanne
- Oensingen vs. Sion
- Oensingen vs. Zug
- Oensingen vs. Zurich