Demographics
BFS · 2025Women
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%
Population change 2025: +222 (+1%) · 223 births · 193 deaths · net migration +198
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
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
36.6% YesNo 63.4%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Aarau: 23.9% Yes
18.1% YesNo 81.9%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Aarau: 51.7% Yes
43.8% YesNo 56.2%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Aarau: 43.2% Yes
30.4% YesNo 69.6%
14.06.2026Aargauische Volksinitiative "Bildungsqualität sichern – JETZT!" vom 28. August 2024Cantonal AG● Rejected · 42.6% YesDistrict Bezirk Aarau: 45.3% Yes
51.8% YesNo 48.2%
14.06.2026Verkehrsinfrastruktur-Entwicklung Raum Suhr (VERAS); Verpflichtungskredit vom 16. Dezember 2025Cantonal AG● Accepted · 54.3% YesDistrict Bezirk Aarau: 67.7% Yes
59.4% YesNo 40.6%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Aarau: 53.7% Yes
63.7% YesNo 36.3%
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
42.4% YesNo 57.7%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Aarau: 35.4% Yes
27.5% YesNo 72.5%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Aarau: 31.8% Yes
24.6% YesNo 75.4%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SP28.4% · strongest party
SP28.4%
SVP18.2%
FDP14.8%
GRÜNE12.8%
GLP11.1%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier96%
Cantonal tax multiplier103%
96%AG range 48%127%
Tax rank 37 of 196 in canton AargauTax 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
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 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual 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 mHighest 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
Roof potential
123.1 GWh/yr
Roofs + façades
165.9 GWh/yr
≈ households powered
27'300
Per inhabitant
5'367 kWh/yr
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 24.09.2026
Electricity
ElCom · 2027Tariff 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 · 2024Standard model, deductible 300570 CHF/mo
Ø premium in canton Aargau392 CHF/mo
Estimate Switzerland 2026465.3 CHF/mo
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 · AREVacancy rate
0.38 %
Second homes
11 %
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 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 · 2024Jobs
36'655
Workplaces
2'737
Services share
91.6 %
Jobs by sector: Primary 32 (0.1%) · Secondary 3'042 (8.3%) · Tertiary 33'581 (91.6%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
5
Organic share
0 %
Farmland
129 ha
Landwirtschaftliche Strukturerhebung 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026
Accessibility
ARE · NPVMNational Passenger Transport Model (NPVM) 2025 · Federal Office for Spatial Development (ARE), retrieved 24.09.2026
Municipality
Wikidata · CC0Wikidata · continuously updated, retrieved 24.09.2026
Largest municipalities22'932 #2 AG · #43 CHGrowing municipalities1% #87 AG · #815 CHShrinking municipalities1% #110 AG · #1295 CHJobs per resident1.6 #1 AG · #22 CHFamilies & children18% #169 AG · #1669 CHAge structure18.4% #131 AG · #1570 CHWomen share50.2% #42 AG · #810 CHForeign residents23.5% #72 AG · #624 CHPopulation density1'858/km² #3 AG · #89 CHTax burden12'312 #34 AG · #351 CHTaxes96% #37 AGWarmest municipalities10 °C #51 AG · #515 CHSunniest municipalities40.1% #103 AG · #1820 CHRainiest municipalities999 mm #181 AG · #1621 CHVoter turnout62.1% #18 AG · #414 CHAgainst Switzerland12.7% #100 AG · #1072 CHAligned with Switzerland87.3% #58 AG · #402 CHSVP strongholds18.2% #194 AG · #1874 CHSP strongholds28.4% #2 AG · #80 CHCentre strongholds7.5% #166 AG · #1504 CHFDP strongholds14.8% #38 AG · #846 CHGLP strongholds11.1% #14 AG · #212 CHGreen strongholds12.8% #4 AG · #266 CHLargest by area12.3 km² #21 AG · #790 CHHighest municipalities384 m #151 AG · #1955 CHSecond homes11% #24 AG · #1054 CHOrganic farming0% #137 AG · #1832 CHBest-connected municipalities61 min #80 AG · #819 CHRemotest municipalities61 min #107 AG · #1301 CHHighest peaks488 m #173 AG · #1922 CHHighest-lying municipalities390 m #169 AG · #2006 CHGreatest vertical range132 m #162 AG · #1678 CHSteepest municipalities3.7° #177 AG · #1799 CHSolar potential123 GWh #1 AG · #50 CHSolar potential per capita5'367 kWh #180 AG · #1924 CHCheapest electricity25.36 Rp./kWh #27 AG · #495 CHMost expensive electricity25.36 Rp./kWh #156 AG · #1600 CH
Postal codes (3)
swisstopoLocalities
swisstopo · 2Nearby municipalities
swisstopo- 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
OpenStreetMapAarau compared with
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