What is the postal code of Biberstein?

The postal code of Biberstein is 5023.

What is the tax rate in Biberstein?

The municipal tax multiplier of Biberstein is 99% (2026); canton AG levies 103%.

How much tax do you pay in Biberstein?

A single person without children pays about 12'472 CHF income tax in Biberstein on 100'000 CHF gross income (federal, cantonal, municipal), rank 49 of 196 in canton AG. Source: ESTV (2026).

How many residents does Biberstein have?

Biberstein has 1'653 residents (2025).

How many foreign residents live in Biberstein?

Biberstein has 179 foreign residents, a share of 10.83% (2025).

Switzerland · Canton AG · Bezirk Aarau

Biberstein

5023

Relief © swisstopo · TINITALY · geoland.at · LGL · IGN · swissTLM3D · swissTLMRegio

Demographics

BFS · 2025

Women

834 50.5%

Men

819 49.5%

Children & youth (0–19)

291 17.6%

Swiss citizens

1'474 89.2%

Foreign residents

179 10.8%

Population density

403 pop./km²

0–19 · 291 · 17.6%20–64 · 893 · 54.0%65+ · 469 · 28.4%

Foreign residents 10.8%0%64.0%

Population change 2025: −4 (−0.2%) · 9 births · 13 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

Vote results for Biberstein

BFS

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 Aarau: 29.6% Yes

24.9% YesNo 75.1%

27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Aarau: 23.9% Yes

20.4% YesNo 79.6%

14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Aarau: 51.7% Yes

57.8% YesNo 42.2%

14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Aarau: 43.2% Yes

43.7% YesNo 56.3%

14.06.2026Aargauische Volksinitiative "Bildungsqualität sichern – JETZT!" vom 28. August 2024Cantonal AG● Rejected · 42.6% YesDistrict Bezirk Aarau: 45.3% Yes

40.7% YesNo 59.3%

14.06.2026Verkehrsinfrastruktur-Entwicklung Raum Suhr (VERAS); Verpflichtungskredit vom 16. Dezember 2025Cantonal AG● Accepted · 54.3% YesDistrict Bezirk Aarau: 67.7% Yes

68.7% YesNo 31.3%

08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Aarau: 53.7% Yes

49.1% YesNo 50.9%

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 Aarau: 31.0% Yes

28.2% YesNo 71.8%

08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Aarau: 35.4% Yes

34.7% YesNo 65.3%

08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Aarau: 31.8% Yes

33.7% YesNo 66.3%

All federal votes →

Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026

Politics

National Council election 2023

SVP28.3% · strongest party

SVP28.3%

SP19.7%

FDP17.4%

GLP9.9%

GRÜNE8.4%

sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026

Taxes 2026

ESTV

Municipal tax multiplier99%

Cantonal tax multiplier103%

99%AG range 48%127%

Tax rank 49 of 196 in canton Aargau

Tax burden

Single, 100'000 CHF gross income

12'472 CHF(12.5%)

Rank 49 of 196 in the canton · 393 of 2110 in Switzerland

Median canton 12'952 CHF · median Switzerland 15'290 CHF

Cheapest Oberwil-Lieli 9'753 CHF · most expensive Ammerswil 13'965 CHF

Income tax as % of gross income

100'000 CHF:12'472 CHF(~12.5%)

BibersteinCanton range AargauSwitzerland median

Show data table

Gross income	Biberstein	Aargau	Switzerland median
40'000	5%	3.8–5.6%	5.4%
50'000	6.8%	5.2–7.7%	7.8%
60'000	8.3%	6.4–9.3%	10.5%
70'000	9.6%	7.4–10.7%	11.9%
80'000	10.6%	8.2–11.9%	13.1%
90'000	11.4%	8.9–12.8%	14.1%
100'000	12.5%	9.8–14%	15.3%
110'000	13.4%	10.5–14.9%	16.3%
120'000	14.1%	11.2–15.8%	17.2%
130'000	14.8%	11.7–16.5%	18.1%
140'000	15.5%	12.4–17.3%	19%
150'000	16.2%	13–18%	19.7%
175'000	17.8%	14.4–19.7%	21.6%
200'000	19.1%	15.5–21.1%	23.2%
225'000	20.4%	16.6–22.4%	24.6%
250'000	21.5%	17.6–23.6%	25.8%
275'000	22.4%	18.4–24.5%	26.8%
300'000	23.1%	19.1–25.3%	27.4%

2026 · Federal Tax Administration (FTA), retrieved 24.09.2026

Climate

MeteoSwiss 1 km grid · 1991–2020

Annual mean temperature 1991–20209.4 °C

Precipitation 1991–20201'087 mm

9.4 °CCH range -5.5°14°

1991–2020 · MeteoSwiss, retrieved 28.08.2026

Terrain

swisstopo · DHM 40 m

Highest point

772 m

Mean elevation

509 m

Relief

412 m

Mean slope

14°

Flat share

11.1%

South-facing

72.1%

Above 2000 m

0.0%

Relief 412 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

11.2 GWh/yr

Roofs + façades

14.9 GWh/yr

≈ households powered

2'500

Per inhabitant

6'757 kWh/yr

11 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 · 2027

Tariff H4

25.36 Rp./kWh

Energy

9.68 Rp./kWh

Grid usage

10.88 Rp./kWh

Levies + grid surcharge

3.15 Rp./kWh

25.36 Rp./kWh10.5645.88

Canton median 26.88 Rp./kWhSwiss median 26.53 Rp./kWh

Network operator Eniwa 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 · 2024

Standard model, deductible 300570 CHF/mo

Ø premium in canton Aargau392 CHF/mo

Estimate Switzerland 2026465.3 CHF/mo

Compare health insurers in Biberstein →Canton Aargau →Premiums explained →

Premiums are set not per municipality but per canton and premium region. Shown is the average adult premium paid in canton Aargau (2024, BAG) — it applies canton-wide, not to any single location.

2024 · Federal Office of Public Health (FOPH), retrieved 12.09.2026

Housing

BFS · ARE

Vacancy rate

1.23 %

Second homes

10.3 %

Avg. rooms

4.3

Dwellings

810

Built before 194612.7%

Built since 200139.8%

1.23 %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 · 2024

Jobs

312

Workplaces

Services share

94.9 %

Jobs by sector: Primary 10 (3.2%) · Secondary 6 (1.9%) · Tertiary 296 (94.9%)

STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026

Agriculture

BFS · 2025

Farms

Organic share

25 %

Farmland

119 ha

Landwirtschaftliche Strukturerhebung 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026

Accessibility

ARE · NPVM

Major centrePT 70 min · Car 49 min

AgglomerationPT 20 min · Car 12 min

Remoteness 59/196 in canton

National Passenger Transport Model (NPVM) 2025 · Federal Office for Spatial Development (ARE), retrieved 24.09.2026

Municipality

Wikidata · CC0

BFS municipality number4002

Websitebiberstein-ag.ch ↗

DistrictBezirk Aarau

Wikidata · continuously updated, retrieved 24.09.2026

Where Biberstein ranks

Largest municipalities1'653 #124 AG · #1092 CH Growing municipalities-0.2% #162 AG · #1545 CH Shrinking municipalities-0.2% #35 AG · #565 CH Jobs per resident0.19 #165 AG · #1831 CH Families & children17.6% #178 AG · #1735 CH Age structure28.4% #3 AG · #160 CH Women share50.5% #25 AG · #634 CH Foreign residents10.8% #188 AG · #1640 CH Population density403/km² #103 AG · #612 CH Tax burden12'472 #50 AG · #394 CH Taxes99% #49 AG Warmest municipalities9.4 °C #164 AG · #1064 CH Sunniest municipalities40.2% #68 AG · #1753 CH Rainiest municipalities1'087 mm #98 AG · #1173 CH Voter turnout67.1% #3 AG · #129 CH Against Switzerland7.8% #146 AG · #1344 CH Aligned with Switzerland92.2% #14 AG · #144 CH SVP strongholds28.3% #182 AG · #1381 CH SP strongholds19.7% #17 AG · #491 CH Centre strongholds7.9% #162 AG · #1456 CH FDP strongholds17.4% #12 AG · #625 CH GLP strongholds9.9% #34 AG · #333 CH Green strongholds8.4% #19 AG · #809 CH Largest by area4.1 km² #146 AG · #1694 CH Highest municipalities448 m #86 AG · #1552 CH Second homes10.3% #34 AG · #1146 CH Organic farming25% #22 AG · #456 CH Best-connected municipalities70 min #134 AG · #1082 CH Remotest municipalities70 min #59 AG · #1031 CH Highest peaks772 m #20 AG · #1036 CH Highest-lying municipalities509 m #67 AG · #1388 CH Greatest vertical range412 m #9 AG · #800 CH Steepest municipalities14° #8 AG · #624 CH Solar potential11 GWh #157 AG · #1468 CH Solar potential per capita6'757 kWh #152 AG · #1718 CH Cheapest electricity25.36 Rp./kWh #28 AG · #496 CH Most expensive electricity25.36 Rp./kWh #157 AG · #1601 CH

Postal codes (1)

swisstopo

5023

Biberstein

Localities

swisstopo · 1

Biberstein5023

Nearby municipalities

swisstopo

Frequently asked questions

What is the postal code of Biberstein?: The postal code of Biberstein is 5023.
What is the tax rate in Biberstein?: The municipal tax multiplier of Biberstein is 99% (2026); canton AG levies 103%.
How much tax do you pay in Biberstein?: A single person without children pays about 12'472 CHF income tax in Biberstein on 100'000 CHF gross income (federal, cantonal, municipal), rank 49 of 196 in canton AG. Source: ESTV (2026).
How many residents does Biberstein have?: Biberstein has 1'653 residents (2025).
How many foreign residents live in Biberstein?: Biberstein has 179 foreign residents, a share of 10.83% (2025).

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