Demographics
BFS · 2025Women
329 48.2%
Men
353 51.8%
Children & youth (0–19)
147 21.6%
Swiss citizens
580 85.0%
Foreign residents
102 15.0%
Population density
411 pop./km²
0–19 · 147 · 21.6%20–64 · 419 · 61.4%65+ · 116 · 17.0%
Foreign residents 15.0%0%64.0%
Population change 2025: −10 (−1.5%) · 4 births · 1 deaths · net migration −13
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 Bremgarten: 23.2% Yes
25.9% YesNo 74.1%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Bremgarten: 31.4% Yes
34.6% YesNo 65.5%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Bremgarten: 58.4% Yes
63.6% YesNo 36.4%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Bremgarten: 54.9% Yes
55.3% YesNo 44.7%
14.06.2026Aargauische Volksinitiative "Bildungsqualität sichern – JETZT!" vom 28. August 2024Cantonal AG● Rejected · 42.6% YesDistrict Bezirk Bremgarten: 40.2% Yes
36.2% YesNo 63.8%
14.06.2026Verkehrsinfrastruktur-Entwicklung Raum Suhr (VERAS); Verpflichtungskredit vom 16. Dezember 2025Cantonal AG● Accepted · 54.3% YesDistrict Bezirk Bremgarten: 49.3% Yes
53.9% YesNo 46.1%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Bremgarten: 48.4% Yes
40.5% YesNo 59.5%
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 Bremgarten: 20.5% Yes
19.8% YesNo 80.3%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Bremgarten: 44.8% Yes
42.2% YesNo 57.8%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Bremgarten: 38.6% Yes
40.0% YesNo 60.0%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP44.3% · strongest party
SVP44.3%
Mitte14.5%
GLP11.3%
FDP9.5%
SP8.5%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier98%
Cantonal tax multiplier103%
98%AG range 48%127%
Tax rank 45 of 196 in canton AargauTax burden
Single, 100'000 CHF gross income
12'419 CHF(12.4%)
Rank 43 of 196 in the canton · 378 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:12'419 CHF(~12.4%)
IslisbergCanton range AargauSwitzerland median
Show data table
| Gross income | Islisberg | Aargau | Switzerland median |
|---|---|---|---|
| 40'000 | 5% | 3.8–5.6% | 5.4% |
| 50'000 | 6.8% | 5.2–7.7% | 7.8% |
| 60'000 | 8.2% | 6.4–9.3% | 10.5% |
| 70'000 | 9.5% | 7.4–10.7% | 11.9% |
| 80'000 | 10.5% | 8.2–11.9% | 13.1% |
| 90'000 | 11.4% | 8.9–12.8% | 14.1% |
| 100'000 | 12.4% | 9.8–14% | 15.3% |
| 110'000 | 13.3% | 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 | 16.1% | 13–18% | 19.7% |
| 175'000 | 17.7% | 14.4–19.7% | 21.6% |
| 200'000 | 19.1% | 15.5–21.1% | 23.2% |
| 225'000 | 20.3% | 16.6–22.4% | 24.6% |
| 250'000 | 21.4% | 17.6–23.6% | 25.8% |
| 275'000 | 22.3% | 18.4–24.5% | 26.8% |
| 300'000 | 23% | 19.1–25.3% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–20209.4 °C
Precipitation 1991–20201'145 mm
9.4 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
680 m
Mean elevation
648 m
Relief
101 m
Mean slope
6.8°
Flat share
35.5%
South-facing
19.2%
Above 2000 m
0.0%
Relief 101 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
4.9 GWh/yr
Roofs + façades
6.6 GWh/yr
≈ households powered
1'100
Per inhabitant
7'229 kWh/yr
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 24.09.2026
Electricity
ElCom · 2027Tariff H4
25.18 Rp./kWh
Energy
10.5 Rp./kWh
Grid usage
11.18 Rp./kWh
Levies + grid surcharge
2.3 Rp./kWh
25.18 Rp./kWh10.5645.88
Canton median 26.88 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator Elektra Genossenschaft Arni-Islisberg
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
0.65 %
Second homes
3.6 %
Avg. rooms
4.3
Dwellings
308
Built before 19469.1%
Built since 200146.8%
0.65 %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
80
Workplaces
36
Services share
61.3 %
Jobs by sector: Primary 23 (28.7%) · Secondary 8 (10.0%) · Tertiary 49 (61.3%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
6
Organic share
16.7 %
Farmland
177 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 municipalities682 #183 AG · #1660 CHGrowing municipalities-1.5% #188 AG · #1911 CHShrinking municipalities-1.5% #9 AG · #200 CHJobs per resident0.12 #196 AG · #2061 CHFamilies & children21.6% #44 AG · #638 CHAge structure17% #163 AG · #1775 CHWomen share48.2% #167 AG · #1820 CHForeign residents15% #159 AG · #1284 CHPopulation density411/km² #99 AG · #599 CHTax burden12'419 #46 AG · #381 CHTaxes98% #45 AGWarmest municipalities9.4 °C #166 AG · #1066 CHSunniest municipalities40.4% #47 AG · #1652 CHRainiest municipalities1'145 mm #8 AG · #855 CHVoter turnout67% #5 AG · #136 CHSVP strongholds44.3% #76 AG · #438 CHSP strongholds8.5% #165 AG · #1659 CHCentre strongholds14.5% #64 AG · #865 CHFDP strongholds9.5% #154 AG · #1454 CHGLP strongholds11.3% #12 AG · #195 CHGreen strongholds5.8% #91 AG · #1382 CHLargest by area1.7 km² #193 AG · #2048 CHHighest municipalities680 m #3 AG · #640 CHSecond homes3.6% #195 AG · #2104 CHOrganic farming16.7% #54 AG · #795 CHBest-connected municipalities55 min #40 AG · #628 CHRemotest municipalities55 min #153 AG · #1489 CHHighest peaks680 m #59 AG · #1269 CHHighest-lying municipalities648 m #8 AG · #892 CHGreatest vertical range101 m #182 AG · #1832 CHSteepest municipalities6.8° #107 AG · #1268 CHSolar potential5 GWh #189 AG · #1916 CHSolar potential per capita7'229 kWh #140 AG · #1633 CHCheapest electricity25.18 Rp./kWh #24 AG · #459 CHMost expensive electricity25.18 Rp./kWh #174 AG · #1649 CH
Postal codes (1)
swisstopoLocalities
swisstopo · 1Nearby municipalities
swisstopo- What is the postal code of Islisberg?
- The postal code of Islisberg is 8905.
- What is the tax rate in Islisberg?
- The municipal tax multiplier of Islisberg is 98% (2026); canton AG levies 103%.
- How much tax do you pay in Islisberg?
- A single person without children pays about 12'419 CHF income tax in Islisberg on 100'000 CHF gross income (federal, cantonal, municipal), rank 43 of 196 in canton AG. Source: ESTV (2026).
- How many residents does Islisberg have?
- Islisberg has 682 residents (2025).
- How many foreign residents live in Islisberg?
- Islisberg has 102 foreign residents, a share of 14.96% (2025).
Map
OpenStreetMapIslisberg compared with
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