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).

Switzerland · Canton SO

Oensingen

4702–4710

SO CANTON4702 4710

Residents

6'766

Area

12.1 km²

Population density

559 pop./km²

Elevation

465 m a.s.l.

Terrain up to

1'020 m a.s.l.

Tax multiplier

116%

Postal codes

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

Demographics

BFS · 2025

Women

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%

STATPOP 2025 · Federal Statistical Office (FSO), retrieved 31.08.2026 · swisstopo, retrieved 24.08.2026

Vote results for Oensingen

BFS

14.06.2026Änderung des Bundesgesetzes über den zivilen Ersatzdienst (Zivildienstgesetz, ZDG)Federal● Accepted · 52.5% Yes

60.5% YesNo 39.5%

14.06.2026Volksinitiative «Keine 10-Millionen-Schweiz! (Nachhaltigkeitsinitiative)»Federal● Rejected · 45.2% Yes

62.4% YesNo 37.6%

14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% Yes

50.5% YesNo 49.5%

14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% Yes

51.1% YesNo 48.9%

08.03.2026Bundesgesetz über die IndividualbesteuerungFederal● Accepted · 54.3% Yes

50.7% YesNo 49.3%

08.03.2026Volksinitiative «Für eine gerechte Energie- und Klimapolitik: Investieren für Wohlstand, Arbeit und Umwelt (Klimafonds-Initiative)»Federal● Rejected · 29.3% Yes

19.7% YesNo 80.3%

08.03.2026Volksinitiative «200 Franken sind genug! (SRG-Initiative)»Federal● Rejected · 38.1% Yes

47.4% YesNo 52.6%

08.03.2026Bargeldinitiative und Gegenvorschlag: StichfrageFederal● Rejected · 37.4% Yes

43.4% YesNo 56.6%

08.03.2026Bundesbeschluss über die schweizerische Währung und die Bargeldversorgung (Gegenvorschlag zur Bargeldinitiative)Federal● Accepted · 73.4% Yes

71.0% YesNo 29.0%

08.03.2026Volksinitiative «Ja zu einer unabhängigen, freien Schweizer Währung mit Münzen oder Banknoten (Bargeld ist Freiheit)»Federal● Rejected · 45.6% Yes

50.2% YesNo 49.8%

All federal votes →

Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 31.08.2026

Politics

National Council election 2023

SVP34.1% · strongest party

SVP34.1%

Mitte26.0%

FDP14.6%

SP12.9%

GRÜNE5.6%

sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 31.08.2026

Taxes 2026

ESTV

Municipal tax multiplier116%

Cantonal tax multiplier104%

116%SO range 65%145%

Tax rank 36 of 104 in canton Solothurn

Tax 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

Income tax as % of gross income

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 31.08.2026

Climate

MeteoSwiss 1 km grid · 1991–2020

Annual 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 m

Highest 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

Solar potential

BFE

Roof potential

66.1 GWh/yr

Roofs + façades

82.6 GWh/yr

≈ households powered

14'700

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 31.08.2026

Electricity

ElCom · 2026

Tariff H4

27.7 Rp./kWh

Energy

10.89 Rp./kWh

Grid usage

11.25 Rp./kWh

Levies + grid surcharge

3.8 Rp./kWh

27.7 Rp./kWh9.6443.61

Canton median 30.42 Rp./kWhSwiss median 27.7 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.

2026 · Federal Electricity Commission (ElCom), retrieved 28.08.2026

Housing

BFS

Vacancy rate

1.2 %

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 31.08.2026 · Vacant dwellings survey 2025 · Federal Statistical Office (FSO), retrieved 31.08.2026

Accessibility

ARE · NPVM

Major centrePT 72 min · Car 46 min

AgglomerationPT 15 min · Car 6 min

Remoteness 23/104 in canton

National Passenger Transport Model (NPVM) 2025 · Federal Office for Spatial Development (ARE), retrieved 28.08.2026

Municipality

Wikidata · CC0

Websiteoensingen.ch ↗

Wikidata · continuously updated, retrieved 31.08.2026

Rankings

Largest municipalities6'766 #9 SO · #298 CH Families & children20.9% #21 SO · #843 CH Age structure17% #102 SO · #1771 CH Women share48.2% #87 SO · #1816 CH Foreign residents40.4% #6 SO · #77 CH Population density559/km² #27 SO · #460 CH Tax burden16'410 #36 SO · #1518 CH Taxes116% #36 SO Warmest municipalities9 °C #79 SO · #1365 CH Sunniest municipalities40.1% #76 SO · #1801 CH Rainiest municipalities1'125 mm #43 SO · #954 CH Voter turnout47.3% #92 SO · #1907 CH Against Switzerland18% #21 SO · #691 CH Aligned with Switzerland82% #56 SO · #740 CH SVP strongholds34.1% #38 SO · #1028 CH SP strongholds12.9% #58 SO · #1171 CH Centre strongholds26% #26 SO · #330 CH FDP strongholds14.6% #60 SO · #859 CH GLP strongholds4.6% #74 SO · #1282 CH Green strongholds5.6% #73 SO · #1417 CH Largest by area12.1 km² #17 SO · #808 CH Highest municipalities465 m #58 SO · #1419 CH Remotest municipalities72 min #23 SO · #960 CH Best-connected municipalities72 min #81 SO · #1149 CH Highest peaks1'020 m #20 SO · #716 CH Highest-lying municipalities534 m #45 SO · #1290 CH Greatest vertical range589 m #19 SO · #623 CH Steepest municipalities9.4° #48 SO · #976 CH Solar potential66 GWh #5 SO · #195 CH Cheapest electricity27.7 Rp./kWh #29 SO · #981 CH Most expensive electricity27.7 Rp./kWh #76 SO · #1313 CH

Postal codes (2)

swisstopo

Localities

swisstopo · 2

Balsthal4710 Oensingen4702

Nearby municipalities

swisstopo

Frequently asked questions

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

OpenStreetMap

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