What is the postal code of Aarau?

Aarau has 3 postal codes: 5000, 5004, 5032.

What is the tax rate in Aarau?

The municipal tax multiplier of Aarau is 96% (2026); canton AG levies 103%.

How much tax do you pay in Aarau?

A single person without children pays about 12'312 CHF income tax in Aarau on 100'000 CHF gross income (federal, cantonal, municipal), rank 34 of 196 in canton AG. Source: ESTV (2026).

How many residents does Aarau have?

Aarau has 22'932 residents (2025).

How many foreign residents live in Aarau?

Aarau has 5'383 foreign residents, a share of 23.47% (2025).

Switzerland · Canton AG

Aarau

5000–5032

AG CANTON5000 5004 5032

Residents

22'932

Area

12.3 km²

Population density

1'858 pop./km²

Elevation

384 m a.s.l.

Tax multiplier

96%

Postal codes

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

Demographics

BFS · 2025

Women

11'517 50.2%

Men

11'415 49.8%

Children & youth (0–19)

4'136 18.0%

Swiss citizens

17'549 76.5%

Foreign residents

5'383 23.5%

Population density

1'858 pop./km²

0–19 · 4'136 · 18.0%20–64 · 14'570 · 63.5%65+ · 4'226 · 18.4%

Foreign residents 23.5%0%64.0%

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

Vote results for Aarau

BFS

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

43.8% YesNo 56.2%

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

30.4% YesNo 69.6%

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

51.8% YesNo 48.2%

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

59.4% YesNo 40.6%

08.03.2026Bundesgesetz über die IndividualbesteuerungFederal● Accepted · 54.3% Yes

63.7% YesNo 36.3%

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

42.4% YesNo 57.7%

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

27.5% YesNo 72.5%

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

24.6% YesNo 75.4%

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

77.6% YesNo 22.4%

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

31.6% YesNo 68.5%

All federal votes →

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

Politics

National Council election 2023

SP28.4% · strongest party

SP28.4%

SVP18.2%

FDP14.8%

GRÜNE12.8%

GLP11.1%

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

Taxes 2026

ESTV

Municipal tax multiplier96%

Cantonal tax multiplier103%

96%AG range 48%127%

Tax rank 37 of 196 in canton Aargau

Tax burden

Single, 100'000 CHF gross income

12'312 CHF(12.3%)

Rank 34 of 196 in the canton · 351 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:12'312 CHF(~12.3%)

AarauCanton range AargauSwitzerland median

Show data table

Gross income	Aarau	Aargau	Switzerland median
40'000	4.9%	3.8–5.6%	5.4%
50'000	6.7%	5.2–7.7%	7.8%
60'000	8.2%	6.4–9.3%	10.5%
70'000	9.4%	7.4–10.7%	11.9%
80'000	10.4%	8.2–11.9%	13.1%
90'000	11.3%	8.9–12.8%	14.1%
100'000	12.3%	9.8–14%	15.3%
110'000	13.2%	10.5–14.9%	16.3%
120'000	14%	11.2–15.8%	17.2%
130'000	14.6%	11.7–16.5%	18.1%
140'000	15.4%	12.4–17.3%	19%
150'000	16%	13–18%	19.7%
175'000	17.6%	14.4–19.7%	21.6%
200'000	18.9%	15.5–21.1%	23.2%
225'000	20.2%	16.6–22.4%	24.6%
250'000	21.2%	17.6–23.6%	25.8%
275'000	22.1%	18.4–24.5%	26.8%
300'000	22.9%	19.1–25.3%	27.4%

2026 · Federal Tax Administration (FTA), retrieved 31.08.2026

Climate

MeteoSwiss 1 km grid · 1991–2020

Annual mean temperature 1991–202010 °C

Precipitation 1991–2020999 mm

10 °CCH range -5.5°14°

1991–2020 · MeteoSwiss, retrieved 28.08.2026

Terrain

swisstopo · DHM 40 m

Highest point

488 m

Mean elevation

390 m

Relief

132 m

Mean slope

3.7°

Flat share

76.5%

South-facing

3.9%

Above 2000 m

0.0%

Relief 132 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

123.1 GWh/yr

Roofs + façades

165.9 GWh/yr

≈ households powered

27'300

123 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

27.17 Rp./kWh

Energy

9.78 Rp./kWh

Grid usage

12.59 Rp./kWh

Levies + grid surcharge

3.15 Rp./kWh

27.17 Rp./kWh9.6443.61

Canton median 27.73 Rp./kWhSwiss median 27.7 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.

2026 · Federal Electricity Commission (ElCom), retrieved 28.08.2026

Housing

BFS

Vacancy rate

0.38 %

Avg. rooms

3.5

Dwellings

12'500

Built before 194626.5%

Built since 200123.5%

0.38 %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 61 min · Car 49 min

AgglomerationPT 14 min · Car 9 min

Remoteness 107/196 in canton

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

Municipality

Wikidata · CC0

Websiteaarau.ch ↗

Wikidata · continuously updated, retrieved 31.08.2026

Rankings

Largest municipalities22'932 #2 AG · #43 CH Families & children18% #169 AG · #1669 CH Age structure18.4% #131 AG · #1570 CH Women share50.2% #42 AG · #810 CH Foreign residents23.5% #72 AG · #624 CH Population density1'858/km² #3 AG · #89 CH Tax burden12'312 #34 AG · #351 CH Taxes96% #37 AG Warmest municipalities10 °C #51 AG · #515 CH Sunniest municipalities40.1% #103 AG · #1820 CH Rainiest municipalities999 mm #181 AG · #1621 CH Voter turnout61% #19 AG · #398 CH Against Switzerland13% #100 AG · #1071 CH Aligned with Switzerland87% #58 AG · #402 CH SVP strongholds18.2% #194 AG · #1870 CH SP strongholds28.4% #2 AG · #80 CH Centre strongholds7.5% #166 AG · #1501 CH FDP strongholds14.8% #38 AG · #846 CH GLP strongholds11.1% #14 AG · #212 CH Green strongholds12.8% #4 AG · #265 CH Largest by area12.3 km² #21 AG · #790 CH Highest municipalities384 m #152 AG · #1956 CH Remotest municipalities61 min #107 AG · #1301 CH Best-connected municipalities61 min #80 AG · #819 CH Highest peaks488 m #173 AG · #1922 CH Highest-lying municipalities390 m #169 AG · #2006 CH Greatest vertical range132 m #162 AG · #1678 CH Steepest municipalities3.7° #177 AG · #1799 CH Solar potential123 GWh #1 AG · #50 CH Cheapest electricity27.17 Rp./kWh #56 AG · #609 CH Most expensive electricity27.17 Rp./kWh #127 AG · #1486 CH

Postal codes (3)

swisstopo

Localities

swisstopo · 2

Aarau5000 5004 Aarau Rohr5032

Nearby municipalities

swisstopo

Frequently asked questions

What is the postal code of Aarau?: Aarau has 3 postal codes: 5000, 5004, 5032.
What is the tax rate in Aarau?: The municipal tax multiplier of Aarau is 96% (2026); canton AG levies 103%.
How much tax do you pay in Aarau?: A single person without children pays about 12'312 CHF income tax in Aarau on 100'000 CHF gross income (federal, cantonal, municipal), rank 34 of 196 in canton AG. Source: ESTV (2026).
How many residents does Aarau have?: Aarau has 22'932 residents (2025).
How many foreign residents live in Aarau?: Aarau has 5'383 foreign residents, a share of 23.47% (2025).

Map

OpenStreetMap