Demographics
BFS · 2025Women
2'840 49.7%
Men
2'876 50.3%
Children & youth (0–19)
1'175 20.6%
Swiss citizens
4'227 74.0%
Foreign residents
1'489 26.1%
Population density
594 pop./km²
0–19 · 1'175 · 20.6%20–64 · 3'431 · 60.0%65+ · 1'110 · 19.4%
Foreign residents 26.1%0%64.0%
Population change 2025: +64 (+1.1%) · 48 births · 55 deaths · net migration +79
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 Lenzburg: 25.6% Yes
24.4% YesNo 75.6%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Lenzburg: 31.6% Yes
36.4% YesNo 63.6%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Lenzburg: 56.9% Yes
58.4% YesNo 41.6%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Lenzburg: 54.0% Yes
58.4% YesNo 41.6%
14.06.2026Aargauische Volksinitiative "Bildungsqualität sichern – JETZT!" vom 28. August 2024Cantonal AG● Rejected · 42.6% YesDistrict Bezirk Lenzburg: 42.3% Yes
42.8% YesNo 57.2%
14.06.2026Verkehrsinfrastruktur-Entwicklung Raum Suhr (VERAS); Verpflichtungskredit vom 16. Dezember 2025Cantonal AG● Accepted · 54.3% YesDistrict Bezirk Lenzburg: 60.2% Yes
62.0% YesNo 38.0%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Lenzburg: 48.8% Yes
44.9% YesNo 55.1%
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 Lenzburg: 22.8% Yes
20.5% YesNo 79.5%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Lenzburg: 44.0% Yes
44.9% YesNo 55.1%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Lenzburg: 37.2% Yes
40.1% YesNo 59.9%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP42.4% · strongest party
SVP42.4%
SP13.4%
FDP12.0%
Mitte8.8%
GLP8.3%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier108%
Cantonal tax multiplier103%
108%AG range 48%127%
Tax rank 98 of 196 in canton AargauTax burden
Single, 100'000 CHF gross income
12'952 CHF(13%)
Rank 98 of 196 in the canton · 511 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:12'952 CHF(~13%)
SeonCanton range AargauSwitzerland median
Show data table
| Gross income | Seon | 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 | 8.6% | 6.4–9.3% | 10.5% |
| 70'000 | 9.9% | 7.4–10.7% | 11.9% |
| 80'000 | 11% | 8.2–11.9% | 13.1% |
| 90'000 | 11.9% | 8.9–12.8% | 14.1% |
| 100'000 | 13% | 9.8–14% | 15.3% |
| 110'000 | 13.9% | 10.5–14.9% | 16.3% |
| 120'000 | 14.7% | 11.2–15.8% | 17.2% |
| 130'000 | 15.4% | 11.7–16.5% | 18.1% |
| 140'000 | 16.1% | 12.4–17.3% | 19% |
| 150'000 | 16.8% | 13–18% | 19.7% |
| 175'000 | 18.4% | 14.4–19.7% | 21.6% |
| 200'000 | 19.8% | 15.5–21.1% | 23.2% |
| 225'000 | 21% | 16.6–22.4% | 24.6% |
| 250'000 | 22.2% | 17.6–23.6% | 25.8% |
| 275'000 | 23.1% | 18.4–24.5% | 26.8% |
| 300'000 | 23.8% | 19.1–25.3% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–20209.7 °C
Precipitation 1991–20201'086 mm
9.7 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
614 m
Mean elevation
476 m
Relief
232 m
Mean slope
6°
Flat share
57.8%
South-facing
4.8%
Above 2000 m
0.0%
Relief 232 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
51.3 GWh/yr
Roofs + façades
66.5 GWh/yr
≈ households powered
11'400
Per inhabitant
8'977 kWh/yr
51 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
26.55 Rp./kWh
Energy
10.9 Rp./kWh
Grid usage
11.45 Rp./kWh
Levies + grid surcharge
2.73 Rp./kWh
26.55 Rp./kWh10.5645.88
Canton median 26.88 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator Technische Betriebe Seon 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
0.19 %
Second homes
8.3 %
Avg. rooms
4
Dwellings
2'646
Built before 194619.8%
Built since 200126.6%
0.19 %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
2'994
Workplaces
378
Services share
72.4 %
Jobs by sector: Primary 77 (2.6%) · Secondary 750 (25.1%) · Tertiary 2'167 (72.4%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
19
Organic share
26.3 %
Farmland
505 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 municipalities5'716 #36 AG · #365 CHGrowing municipalities1.1% #79 AG · #724 CHShrinking municipalities1.1% #119 AG · #1391 CHJobs per resident0.52 #34 AG · #495 CHFamilies & children20.6% #88 AG · #952 CHAge structure19.4% #107 AG · #1360 CHWomen share49.7% #84 AG · #1147 CHForeign residents26.1% #64 AG · #502 CHPopulation density594/km² #68 AG · #436 CHTax burden12'952 #99 AG · #512 CHTaxes108% #98 AGWarmest municipalities9.7 °C #126 AG · #828 CHSunniest municipalities40.2% #99 AG · #1784 CHRainiest municipalities1'086 mm #100 AG · #1180 CHVoter turnout53.8% #123 AG · #1386 CHAgainst Switzerland16.7% #68 AG · #790 CHAligned with Switzerland83.3% #103 AG · #681 CHSVP strongholds42.4% #95 AG · #532 CHSP strongholds13.4% #88 AG · #1127 CHCentre strongholds8.8% #141 AG · #1341 CHFDP strongholds12% #92 AG · #1153 CHGLP strongholds8.3% #67 AG · #534 CHGreen strongholds7.2% #42 AG · #1054 CHLargest by area9.6 km² #47 AG · #994 CHHighest municipalities445 m #88 AG · #1572 CHSecond homes8.3% #83 AG · #1545 CHOrganic farming26.3% #20 AG · #412 CHBest-connected municipalities60 min #79 AG · #785 CHRemotest municipalities60 min #124 AG · #1345 CHHighest peaks614 m #98 AG · #1482 CHHighest-lying municipalities476 m #93 AG · #1558 CHGreatest vertical range232 m #85 AG · #1219 CHSteepest municipalities6° #125 AG · #1400 CHSolar potential51 GWh #26 AG · #312 CHSolar potential per capita8'977 kWh #80 AG · #1264 CHCheapest electricity26.55 Rp./kWh #65 AG · #1034 CHMost expensive electricity26.55 Rp./kWh #133 AG · #1074 CH
Postal codes (1)
swisstopoLocalities
swisstopo · 1Nearby municipalities
swisstopo- What is the postal code of Seon?
- The postal code of Seon is 5703.
- What is the tax rate in Seon?
- The municipal tax multiplier of Seon is 108% (2026); canton AG levies 103%.
- How much tax do you pay in Seon?
- A single person without children pays about 12'952 CHF income tax in Seon on 100'000 CHF gross income (federal, cantonal, municipal), rank 98 of 196 in canton AG. Source: ESTV (2026).
- How many residents does Seon have?
- Seon has 5'716 residents (2025).
- How many foreign residents live in Seon?
- Seon has 1'489 foreign residents, a share of 26.05% (2025).
Map
OpenStreetMapSeon compared with
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