Demographics
BFS · 2025Women
2'283 50.6%
Men
2'233 49.4%
Children & youth (0–19)
877 19.4%
Swiss citizens
3'938 87.2%
Foreign residents
578 12.8%
Population density
437 pop./km²
0–19 · 877 · 19.4%20–64 · 2'606 · 57.7%65+ · 1'033 · 22.9%
Foreign residents 12.8%0%64.0%
Population change 2025: +22 (+0.5%) · 34 births · 33 deaths · net migration +21
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
22.3% YesNo 77.7%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Lenzburg: 31.6% Yes
35.5% YesNo 64.5%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Lenzburg: 56.9% Yes
63.0% YesNo 37.0%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Lenzburg: 54.0% Yes
59.4% YesNo 40.6%
14.06.2026Aargauische Volksinitiative "Bildungsqualität sichern – JETZT!" vom 28. August 2024Cantonal AG● Rejected · 42.6% YesDistrict Bezirk Lenzburg: 42.3% Yes
35.7% YesNo 64.3%
14.06.2026Verkehrsinfrastruktur-Entwicklung Raum Suhr (VERAS); Verpflichtungskredit vom 16. Dezember 2025Cantonal AG● Accepted · 54.3% YesDistrict Bezirk Lenzburg: 60.2% Yes
61.8% YesNo 38.3%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Lenzburg: 48.8% Yes
48.8% YesNo 51.3%
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 Lenzburg: 22.8% Yes
18.1% YesNo 81.9%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Lenzburg: 44.0% Yes
45.5% YesNo 54.5%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Lenzburg: 37.2% Yes
38.1% YesNo 61.9%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP43.2% · strongest party
SVP43.2%
FDP16.7%
SP10.6%
Mitte9.0%
GLP7.7%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier72%
Cantonal tax multiplier103%
72%AG range 48%127%
Tax rank 5 of 196 in canton AargauTax burden
Single, 100'000 CHF gross income
11'032 CHF(11%)
Rank 5 of 196 in the canton · 123 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:11'032 CHF(~11%)
SeengenCanton range AargauSwitzerland median
Show data table
| Gross income | Seengen | Aargau | Switzerland median |
|---|---|---|---|
| 40'000 | 4.4% | 3.8–5.6% | 5.4% |
| 50'000 | 5.9% | 5.2–7.7% | 7.8% |
| 60'000 | 7.3% | 6.4–9.3% | 10.5% |
| 70'000 | 8.4% | 7.4–10.7% | 11.9% |
| 80'000 | 9.3% | 8.2–11.9% | 13.1% |
| 90'000 | 10.1% | 8.9–12.8% | 14.1% |
| 100'000 | 11% | 9.8–14% | 15.3% |
| 110'000 | 11.9% | 10.5–14.9% | 16.3% |
| 120'000 | 12.6% | 11.2–15.8% | 17.2% |
| 130'000 | 13.2% | 11.7–16.5% | 18.1% |
| 140'000 | 13.9% | 12.4–17.3% | 19% |
| 150'000 | 14.5% | 13–18% | 19.7% |
| 175'000 | 16% | 14.4–19.7% | 21.6% |
| 200'000 | 17.2% | 15.5–21.1% | 23.2% |
| 225'000 | 18.4% | 16.6–22.4% | 24.6% |
| 250'000 | 19.4% | 17.6–23.6% | 25.8% |
| 275'000 | 20.3% | 18.4–24.5% | 26.8% |
| 300'000 | 21% | 19.1–25.3% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–20209.5 °C
Precipitation 1991–20201'115 mm
9.5 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
712 m
Mean elevation
532 m
Relief
271 m
Mean slope
5.5°
Flat share
53.0%
South-facing
19.4%
Above 2000 m
0.0%
Relief 271 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
32.3 GWh/yr
Roofs + façades
42.8 GWh/yr
≈ households powered
7'200
Per inhabitant
7'146 kWh/yr
32 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
29.86 Rp./kWh
Energy
10.37 Rp./kWh
Grid usage
14.95 Rp./kWh
Levies + grid surcharge
3.24 Rp./kWh
29.86 Rp./kWh10.5645.88
Canton median 26.88 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator AEW Energie 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
0.8 %
Second homes
8.1 %
Avg. rooms
4.1
Dwellings
2'121
Built before 194613.2%
Built since 200148.4%
0.8 %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
1'398
Workplaces
270
Services share
77.6 %
Jobs by sector: Primary 98 (7.0%) · Secondary 215 (15.4%) · Tertiary 1'085 (77.6%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
20
Organic share
15 %
Farmland
463 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 municipalities4'516 #54 AG · #492 CHGrowing municipalities0.5% #114 AG · #1109 CHShrinking municipalities0.5% #83 AG · #1002 CHJobs per resident0.31 #90 AG · #1244 CHFamilies & children19.4% #135 AG · #1346 CHAge structure22.9% #32 AG · #698 CHWomen share50.6% #20 AG · #585 CHForeign residents12.8% #173 AG · #1468 CHPopulation density437/km² #94 AG · #566 CHTax burden11'032 #5 AG · #123 CHTaxes72% #5 AGWarmest municipalities9.5 °C #160 AG · #994 CHSunniest municipalities40.1% #126 AG · #1843 CHRainiest municipalities1'115 mm #60 AG · #1019 CHVoter turnout60.1% #36 AG · #582 CHAgainst Switzerland15.7% #78 AG · #862 CHAligned with Switzerland84.3% #92 AG · #604 CHSVP strongholds43.2% #86 AG · #489 CHSP strongholds10.6% #139 AG · #1462 CHCentre strongholds9% #135 AG · #1305 CHFDP strongholds16.7% #19 AG · #683 CHGLP strongholds7.7% #84 AG · #630 CHGreen strongholds5.7% #99 AG · #1411 CHLargest by area10.3 km² #40 AG · #940 CHHighest municipalities520 m #36 AG · #1124 CHSecond homes8.1% #91 AG · #1617 CHOrganic farming15% #62 AG · #881 CHBest-connected municipalities80 min #169 AG · #1351 CHRemotest municipalities80 min #28 AG · #763 CHHighest peaks712 m #41 AG · #1178 CHHighest-lying municipalities532 m #49 AG · #1298 CHGreatest vertical range271 m #57 AG · #1078 CHSteepest municipalities5.5° #136 AG · #1477 CHSolar potential32 GWh #55 AG · #623 CHSolar potential per capita7'146 kWh #143 AG · #1652 CHCheapest electricity29.86 Rp./kWh #170 AG · #1775 CHMost expensive electricity29.86 Rp./kWh #33 AG · #338 CH
Postal codes (1)
swisstopoLocalities
swisstopo · 1Nearby municipalities
swisstopo- What is the postal code of Seengen?
- The postal code of Seengen is 5707.
- What is the tax rate in Seengen?
- The municipal tax multiplier of Seengen is 72% (2026); canton AG levies 103%.
- How much tax do you pay in Seengen?
- A single person without children pays about 11'032 CHF income tax in Seengen on 100'000 CHF gross income (federal, cantonal, municipal), rank 5 of 196 in canton AG. Source: ESTV (2026).
- How many residents does Seengen have?
- Seengen has 4'516 residents (2025).
- How many foreign residents live in Seengen?
- Seengen has 578 foreign residents, a share of 12.8% (2025).
Map
OpenStreetMapSeengen compared with
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