What is the postal code of Bolken?

The postal code of Bolken is 4556.

What is the tax rate in Bolken?

The municipal tax multiplier of Bolken is 145% (2026); canton SO levies 104%.

How much tax do you pay in Bolken?

A single person without children pays about 18'375 CHF income tax in Bolken on 100'000 CHF gross income (federal, cantonal, municipal), rank 104 of 104 in canton SO. Source: ESTV (2026).

How many residents does Bolken have?

Bolken has 579 residents (2025).

How many foreign residents live in Bolken?

Bolken has 45 foreign residents, a share of 7.77% (2025).

Switzerland · Canton SO

Bolken

4556

SO CANTON4556

Residents

579

Area

2.1 km²

Population density

273 pop./km²

Elevation

496 m a.s.l.

Tax multiplier

145%

Postal codes

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

Demographics

BFS · 2025

Women

275 47.5%

Men

304 52.5%

Children & youth (0–19)

113 19.5%

Swiss citizens

534 92.2%

Foreign residents

45 7.8%

Population density

273 pop./km²

0–19 · 113 · 19.5%20–64 · 350 · 60.4%65+ · 116 · 20.0%

Foreign residents 7.8%0%64.0%

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

Vote results for Bolken

BFS

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

57.0% YesNo 43.0%

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

63.4% YesNo 36.6%

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

52.2% YesNo 47.8%

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

52.2% YesNo 47.8%

08.03.2026Bundesgesetz über die IndividualbesteuerungFederal● Accepted · 54.3% Yes

48.6% YesNo 51.4%

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

18.9% YesNo 81.2%

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

41.9% YesNo 58.1%

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

36.4% YesNo 63.6%

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

72.8% YesNo 27.2%

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

42.2% YesNo 57.8%

All federal votes →

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

Politics

National Council election 2023

SVP40.1% · strongest party

SVP40.1%

SP16.8%

Mitte15.0%

FDP10.8%

GLP8.2%

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

Taxes 2026

ESTV

Municipal tax multiplier145%

Cantonal tax multiplier104%

145%SO range 65%145%

Tax rank 104 of 104 in canton Solothurn

Tax burden

Single, 100'000 CHF gross income

18'375 CHF(18.4%)

Rank 104 of 104 in the canton · 2095 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:18'375 CHF(~18.4%)

BolkenCanton range SolothurnSwitzerland median

Show data table

Gross income	Bolken	Solothurn	Switzerland median
40'000	8.8%	6.1–8.8%	5.4%
50'000	11.4%	7.9–11.4%	7.8%
60'000	13.5%	9.4–13.5%	10.5%
70'000	15.1%	10.5–15.1%	11.9%
80'000	16.3%	11.5–16.3%	13.1%
90'000	17.3%	12.2–17.3%	14.1%
100'000	18.4%	13–18.4%	15.3%
110'000	19.3%	13.8–19.3%	16.3%
120'000	20.1%	14.4–20.1%	17.2%
130'000	20.9%	15.1–20.9%	18.1%
140'000	21.8%	15.7–21.8%	19%
150'000	22.5%	16.4–22.5%	19.7%
175'000	24.3%	17.8–24.3%	21.6%
200'000	25.8%	19.1–25.8%	23.2%
225'000	27%	20.1–27%	24.6%
250'000	28.2%	21.1–28.2%	25.8%
275'000	29.1%	21.9–29.1%	26.8%
300'000	29.8%	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 1991–20209.3 °C

Precipitation 1991–20201'087 mm

9.3 °CCH range -5.5°14°

1991–2020 · MeteoSwiss, retrieved 28.08.2026

Terrain

swisstopo · DHM 40 m

Highest point

503 m

Mean elevation

480 m

Relief

42 m

Mean slope

2.3°

Flat share

94.2%

South-facing

0.0%

Above 2000 m

0.0%

Relief 42 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

5.3 GWh/yr

Roofs + façades

6.9 GWh/yr

≈ households powered

1'200

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 31.08.2026

Electricity

ElCom · 2026

Tariff H4

27.3 Rp./kWh

Energy

10.89 Rp./kWh

Grid usage

11.25 Rp./kWh

Levies + grid surcharge

3.4 Rp./kWh

27.3 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

2.7 %

Avg. rooms

4.5

Dwellings

259

Built before 194621.2%

Built since 200123.2%

2.7 %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 56 min · Car 43 min

AgglomerationPT 22 min · Car 11 min

Remoteness 83/104 in canton

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

Municipality

Wikidata · CC0

Websitebolken.ch ↗

Wikidata · continuously updated, retrieved 31.08.2026

Rankings

Largest municipalities579 #93 SO · #1735 CH Families & children19.5% #55 SO · #1307 CH Age structure20% #84 SO · #1242 CH Women share47.5% #95 SO · #1947 CH Foreign residents7.8% #93 SO · #1876 CH Population density273/km² #55 SO · #832 CH Tax burden18'375 #104 SO · #2095 CH Taxes145% #104 SO Warmest municipalities9.3 °C #59 SO · #1147 CH Sunniest municipalities40.3% #58 SO · #1683 CH Rainiest municipalities1'087 mm #66 SO · #1171 CH Voter turnout57.9% #16 SO · #704 CH SVP strongholds40.1% #12 SO · #656 CH SP strongholds16.8% #33 SO · #757 CH Centre strongholds15% #71 SO · #823 CH FDP strongholds10.8% #97 SO · #1288 CH GLP strongholds8.2% #11 SO · #547 CH Green strongholds6.2% #60 SO · #1283 CH Largest by area2.1 km² #93 SO · #1995 CH Highest municipalities496 m #42 SO · #1227 CH Remotest municipalities56 min #83 SO · #1453 CH Best-connected municipalities56 min #22 SO · #647 CH Highest peaks503 m #82 SO · #1868 CH Highest-lying municipalities480 m #66 SO · #1529 CH Greatest vertical range42 m #97 SO · #2060 CH Steepest municipalities2.3° #90 SO · #1977 CH Solar potential5 GWh #95 SO · #1888 CH Cheapest electricity27.3 Rp./kWh #11 SO · #742 CH Most expensive electricity27.3 Rp./kWh #80 SO · #1352 CH

Postal codes (1)

swisstopo

4556

Bolken

Localities

swisstopo · 1

Bolken4556

Nearby municipalities

swisstopo

Frequently asked questions

What is the postal code of Bolken?: The postal code of Bolken is 4556.
What is the tax rate in Bolken?: The municipal tax multiplier of Bolken is 145% (2026); canton SO levies 104%.
How much tax do you pay in Bolken?: A single person without children pays about 18'375 CHF income tax in Bolken on 100'000 CHF gross income (federal, cantonal, municipal), rank 104 of 104 in canton SO. Source: ESTV (2026).
How many residents does Bolken have?: Bolken has 579 residents (2025).
How many foreign residents live in Bolken?: Bolken has 45 foreign residents, a share of 7.77% (2025).

Map

OpenStreetMap

Compare

Bolken compared with