What is the postal code of Grenchen?

The postal code of Grenchen is 2540.

What is the tax rate in Grenchen?

The municipal tax multiplier of Grenchen is 114.9% (2026); canton SO levies 104%.

How much tax do you pay in Grenchen?

A single person without children pays about 16'386 CHF income tax in Grenchen on 100'000 CHF gross income (federal, cantonal, municipal), rank 34 of 104 in canton SO. Source: ESTV (2026).

How many residents does Grenchen have?

Grenchen has 18'973 residents (2025).

How many foreign residents live in Grenchen?

Grenchen has 7'757 foreign residents, a share of 40.88% (2025).

Switzerland · Canton SO

Grenchen

2540

SO CANTON2540

Residents

18'973

Area

26 km²

Population density

729 pop./km²

Elevation

451 m a.s.l.

Terrain up to

1'399 m a.s.l.

Tax multiplier

114.9%

Postal codes

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

Demographics

BFS · 2025

Women

9'382 49.4%

Men

9'591 50.6%

Children & youth (0–19)

3'437 18.1%

Swiss citizens

11'216 59.1%

Foreign residents

7'757 40.9%

Population density

729 pop./km²

0–19 · 3'437 · 18.1%20–64 · 11'346 · 59.8%65+ · 4'190 · 22.1%

Foreign residents 40.9%0%64.0%

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

Vote results for Grenchen

BFS

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

57.1% YesNo 42.9%

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

56.4% YesNo 43.6%

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

57.8% YesNo 42.3%

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

57.6% YesNo 42.4%

08.03.2026Bundesgesetz über die IndividualbesteuerungFederal● Accepted · 54.3% Yes

55.2% YesNo 44.8%

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

22.1% YesNo 77.9%

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

46.5% YesNo 53.5%

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

43.5% YesNo 56.5%

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

70.7% YesNo 29.3%

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

51.5% YesNo 48.5%

All federal votes →

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

Politics

National Council election 2023

SVP38.5% · strongest party

SVP38.5%

SP20.7%

FDP14.4%

Mitte12.7%

GRÜNE5.6%

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

Taxes 2026

ESTV

Municipal tax multiplier114.9%

Cantonal tax multiplier104%

114.9%SO range 65%145%

Tax rank 32 of 104 in canton Solothurn

Tax burden

Single, 100'000 CHF gross income

16'386 CHF(16.4%)

Rank 34 of 104 in the canton · 1497 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:16'386 CHF(~16.4%)

GrenchenCanton range SolothurnSwitzerland median

Show data table

Gross income	Grenchen	Solothurn	Switzerland median
40'000	7.8%	6.1–8.8%	5.4%
50'000	10.1%	7.9–11.4%	7.8%
60'000	12%	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	17.2%	13.8–19.3%	16.3%
120'000	18%	14.4–20.1%	17.2%
130'000	18.7%	15.1–20.9%	18.1%
140'000	19.5%	15.7–21.8%	19%
150'000	20.2%	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	25.5%	21.1–28.2%	25.8%
275'000	26.4%	21.9–29.1%	26.8%
300'000	27.1%	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 1991–20209.5 °C

Precipitation 1991–20201'372 mm

9.5 °CCH range -5.5°14°

1991–2020 · MeteoSwiss, retrieved 28.08.2026

Terrain

swisstopo · DHM 40 m

Highest point

1'399 m

Mean elevation

720 m

Relief

976 m

Mean slope

10.3°

Flat share

44.2%

South-facing

38.5%

Above 2000 m

0.0%

Relief 976 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

115 GWh/yr

Roofs + façades

153 GWh/yr

≈ households powered

25'600

115 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

27.5 Rp./kWh

Energy

12.97 Rp./kWh

Grid usage

9.62 Rp./kWh

Levies + grid surcharge

3.42 Rp./kWh

27.5 Rp./kWh9.6443.61

Canton median 30.42 Rp./kWhSwiss median 27.7 Rp./kWh

Network operator SWG

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

1.27 %

Avg. rooms

3.4

Dwellings

10'507

Built before 194620.2%

Built since 200116.0%

1.27 %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 69 min · Car 54 min

AgglomerationPT 8 min · Car 5 min

Remoteness 33/104 in canton

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

Municipality

Wikidata · CC0

Websitegrenchen.ch ↗

Wikidata · continuously updated, retrieved 31.08.2026

Rankings

Largest municipalities18'973 #2 SO · #63 CH Families & children18.1% #81 SO · #1650 CH Age structure22.1% #53 SO · #837 CH Women share49.4% #66 SO · #1320 CH Foreign residents40.9% #5 SO · #69 CH Population density729/km² #18 SO · #342 CH Tax burden16'386 #34 SO · #1497 CH Taxes114.9% #32 SO Warmest municipalities9.5 °C #46 SO · #975 CH Sunniest municipalities40.5% #47 SO · #1607 CH Rainiest municipalities1'372 mm #9 SO · #394 CH Voter turnout40.6% #104 SO · #2094 CH Against Switzerland10.1% #53 SO · #1193 CH Aligned with Switzerland89.9% #23 SO · #262 CH SVP strongholds38.5% #17 SO · #740 CH SP strongholds20.7% #17 SO · #412 CH Centre strongholds12.7% #82 SO · #975 CH FDP strongholds14.4% #62 SO · #880 CH GLP strongholds5% #66 SO · #1190 CH Green strongholds5.6% #75 SO · #1419 CH Largest by area26 km² #2 SO · #347 CH Highest municipalities451 m #71 SO · #1526 CH Remotest municipalities69 min #33 SO · #1057 CH Best-connected municipalities69 min #73 SO · #1055 CH Highest peaks1'399 m #2 SO · #500 CH Highest-lying municipalities720 m #18 SO · #722 CH Greatest vertical range976 m #2 SO · #451 CH Steepest municipalities10.3° #44 SO · #896 CH Solar potential115 GWh #1 SO · #59 CH Cheapest electricity27.5 Rp./kWh #27 SO · #772 CH Most expensive electricity27.5 Rp./kWh #78 SO · #1333 CH

Postal codes (1)

swisstopo

2540

Grenchen

Localities

swisstopo · 1

Grenchen2540

Nearby municipalities

swisstopo

Frequently asked questions

What is the postal code of Grenchen?: The postal code of Grenchen is 2540.
What is the tax rate in Grenchen?: The municipal tax multiplier of Grenchen is 114.9% (2026); canton SO levies 104%.
How much tax do you pay in Grenchen?: A single person without children pays about 16'386 CHF income tax in Grenchen on 100'000 CHF gross income (federal, cantonal, municipal), rank 34 of 104 in canton SO. Source: ESTV (2026).
How many residents does Grenchen have?: Grenchen has 18'973 residents (2025).
How many foreign residents live in Grenchen?: Grenchen has 7'757 foreign residents, a share of 40.88% (2025).

Map

OpenStreetMap

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