Demographics
BFS · 2025Women
1'377 49.8%
Men
1'388 50.2%
Children & youth (0–19)
543 19.6%
Swiss citizens
2'209 79.9%
Foreign residents
556 20.1%
Population density
243 pop./km²
0–19 · 543 · 19.6%20–64 · 1'726 · 62.4%65+ · 496 · 17.9%
Foreign residents 20.1%0%64.0%
Population change 2025: +98 (+3.7%) · 25 births · 18 deaths · net migration +105
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 Laufenburg: 23.2% Yes
21.8% YesNo 78.3%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Laufenburg: 31.7% Yes
30.9% YesNo 69.1%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Laufenburg: 58.3% Yes
54.1% YesNo 45.9%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Laufenburg: 54.4% Yes
55.3% YesNo 44.7%
14.06.2026Aargauische Volksinitiative "Bildungsqualität sichern – JETZT!" vom 28. August 2024Cantonal AG● Rejected · 42.6% YesDistrict Bezirk Laufenburg: 41.2% Yes
39.4% YesNo 60.6%
14.06.2026Verkehrsinfrastruktur-Entwicklung Raum Suhr (VERAS); Verpflichtungskredit vom 16. Dezember 2025Cantonal AG● Accepted · 54.3% YesDistrict Bezirk Laufenburg: 48.7% Yes
49.1% YesNo 50.9%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Laufenburg: 43.1% Yes
46.3% YesNo 53.7%
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 Laufenburg: 20.9% Yes
19.6% YesNo 80.4%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Laufenburg: 43.0% Yes
43.2% YesNo 56.8%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Laufenburg: 38.1% Yes
38.5% YesNo 61.5%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP42.0% · strongest party
SVP42.0%
Mitte15.4%
SP13.3%
FDP10.6%
GLP5.6%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier110%
Cantonal tax multiplier103%
110%AG range 48%127%
Tax rank 110 of 196 in canton AargauTax burden
Single, 100'000 CHF gross income
13'059 CHF(13.1%)
Rank 107 of 196 in the canton · 551 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:13'059 CHF(~13.1%)
Herznach-UekenCanton range AargauSwitzerland median
Show data table
| Gross income | Herznach-Ueken | Aargau | Switzerland median |
|---|---|---|---|
| 40'000 | 5.2% | 3.8–5.6% | 5.4% |
| 50'000 | 7.1% | 5.2–7.7% | 7.8% |
| 60'000 | 8.7% | 6.4–9.3% | 10.5% |
| 70'000 | 10% | 7.4–10.7% | 11.9% |
| 80'000 | 11.1% | 8.2–11.9% | 13.1% |
| 90'000 | 12% | 8.9–12.8% | 14.1% |
| 100'000 | 13.1% | 9.8–14% | 15.3% |
| 110'000 | 14% | 10.5–14.9% | 16.3% |
| 120'000 | 14.8% | 11.2–15.8% | 17.2% |
| 130'000 | 15.5% | 11.7–16.5% | 18.1% |
| 140'000 | 16.2% | 12.4–17.3% | 19% |
| 150'000 | 16.9% | 13–18% | 19.7% |
| 175'000 | 18.5% | 14.4–19.7% | 21.6% |
| 200'000 | 19.9% | 15.5–21.1% | 23.2% |
| 225'000 | 21.2% | 16.6–22.4% | 24.6% |
| 250'000 | 22.3% | 17.6–23.6% | 25.8% |
| 275'000 | 23.2% | 18.4–24.5% | 26.8% |
| 300'000 | 24% | 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 1991–20201'045 mm
10 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
602 m
Mean elevation
481 m
Relief
239 m
Mean slope
9.7°
Flat share
25.2%
South-facing
16.4%
Above 2000 m
0.0%
Relief 239 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
23.8 GWh/yr
Roofs + façades
30.9 GWh/yr
≈ households powered
5'300
Per inhabitant
8'597 kWh/yr
24 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 range H4
24.4–29.56 Rp./kWh
26.98 Rp./kWh10.5645.88
Canton median 26.88 Rp./kWhSwiss median 26.53 Rp./kWh
Network operators Gemeinde Ueken, Elektrizitätsversorgung · AEW Energie AG
ElCom tariff comparison ↗This municipality is served by 2 network operators with different tariffs; the range spans the cheapest and the most expensive.
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
0.5 %
Second homes
7.9 %
Avg. rooms
4.3
Dwellings
1'203
Built before 194620.1%
Built since 200135.8%
0.5 %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
522
Workplaces
168
Services share
50.2 %
Jobs by sector: Primary 94 (18.0%) · Secondary 166 (31.8%) · Tertiary 262 (50.2%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
27
Organic share
18.5 %
Farmland
660 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 municipalities2'765 #88 AG · #772 CHGrowing municipalities3.7% #14 AG · #113 CHShrinking municipalities3.7% #183 AG · #1997 CHJobs per resident0.19 #166 AG · #1832 CHFamilies & children19.6% #126 AG · #1281 CHAge structure17.9% #147 AG · #1663 CHWomen share49.8% #78 AG · #1084 CHForeign residents20.1% #111 AG · #853 CHPopulation density243/km² #139 AG · #911 CHTax burden13'059 #109 AG · #553 CHTaxes110% #110 AGWarmest municipalities10 °C #63 AG · #527 CHSunniest municipalities40.2% #93 AG · #1778 CHRainiest municipalities1'045 mm #147 AG · #1413 CHVoter turnout57.5% #65 AG · #884 CHAgainst Switzerland17.6% #58 AG · #704 CHAligned with Switzerland82.4% #108 AG · #753 CHSVP strongholds42% #103 AG · #559 CHSP strongholds13.3% #92 AG · #1136 CHCentre strongholds15.4% #57 AG · #807 CHFDP strongholds10.6% #129 AG · #1319 CHGLP strongholds5.6% #145 AG · #1064 CHGreen strongholds5.4% #111 AG · #1477 CHLargest by area11.4 km² #30 AG · #864 CHSecond homes7.9% #100 AG · #1655 CHOrganic farming18.5% #49 AG · #708 CHBest-connected municipalities65 min #110 AG · #946 CHRemotest municipalities65 min #86 AG · #1176 CHHighest peaks602 m #106 AG · #1536 CHHighest-lying municipalities481 m #88 AG · #1524 CHGreatest vertical range239 m #76 AG · #1181 CHSteepest municipalities9.7° #48 AG · #950 CHSolar potential24 GWh #90 AG · #884 CHSolar potential per capita8'597 kWh #89 AG · #1338 CHCheapest electricity26.98 Rp./kWh #91 AG · #1119 CHMost expensive electricity26.98 Rp./kWh #106 AG · #988 CH
Postal codes (2)
swisstopoLocalities
swisstopo · 2Nearby municipalities
swisstopo- What is the postal code of Herznach-Ueken?
- Herznach-Ueken has 2 postal codes: 5027, 5028.
- What is the tax rate in Herznach-Ueken?
- The municipal tax multiplier of Herznach-Ueken is 110% (2026); canton AG levies 103%.
- How much tax do you pay in Herznach-Ueken?
- A single person without children pays about 13'059 CHF income tax in Herznach-Ueken on 100'000 CHF gross income (federal, cantonal, municipal), rank 107 of 196 in canton AG. Source: ESTV (2026).
- How many residents does Herznach-Ueken have?
- Herznach-Ueken has 2'765 residents (2025).
- How many foreign residents live in Herznach-Ueken?
- Herznach-Ueken has 556 foreign residents, a share of 20.11% (2025).
Map
OpenStreetMapHerznach-Ueken compared with
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