Demographics
BFS · 2025Women
1'490 50.6%
Men
1'454 49.4%
Children & youth (0–19)
638 21.7%
Swiss citizens
2'469 83.9%
Foreign residents
475 16.1%
Population density
232 pop./km²
0–19 · 638 · 21.7%20–64 · 1'749 · 59.4%65+ · 557 · 18.9%
Foreign residents 16.1%0%64.0%
Population change 2025: −11 (−0.4%) · 20 births · 26 deaths · net migration +3
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
14.06.2026Änderung des Bundesgesetzes über den zivilen Ersatzdienst (Zivildienstgesetz, ZDG)Federal● Accepted · 52.5% YesDistrict Bezirk Zurzach: 59.7% Yes
61.6% YesNo 38.4%
14.06.2026Volksinitiative «Keine 10-Millionen-Schweiz! (Nachhaltigkeitsinitiative)»Federal● Rejected · 45.2% YesDistrict Bezirk Zurzach: 56.6% Yes
54.6% YesNo 45.4%
14.06.2026Aargauische Volksinitiative "Bildungsqualität sichern – JETZT!" vom 28. August 2024Cantonal AG● Rejected · 42.6% YesDistrict Bezirk Zurzach: 41.6% Yes
44.6% YesNo 55.5%
14.06.2026Verkehrsinfrastruktur-Entwicklung Raum Suhr (VERAS); Verpflichtungskredit vom 16. Dezember 2025Cantonal AG● Accepted · 54.3% YesDistrict Bezirk Zurzach: 50.8% Yes
56.0% YesNo 44.0%
08.03.2026Bundesgesetz über die IndividualbesteuerungFederal● Accepted · 54.3% YesDistrict Bezirk Zurzach: 42.2% Yes
41.7% YesNo 58.3%
08.03.2026Volksinitiative «Für eine gerechte Energie- und Klimapolitik: Investieren für Wohlstand, Arbeit und Umwelt (Klimafonds-Initiative)»Federal● Rejected · 29.3% YesDistrict Bezirk Zurzach: 19.5% Yes
21.4% YesNo 78.6%
08.03.2026Volksinitiative «200 Franken sind genug! (SRG-Initiative)»Federal● Rejected · 38.1% YesDistrict Bezirk Zurzach: 43.7% Yes
38.9% YesNo 61.1%
08.03.2026Bargeldinitiative und Gegenvorschlag: StichfrageFederal● Rejected · 37.4% YesDistrict Bezirk Zurzach: 40.6% Yes
35.0% YesNo 65.0%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 21.09.2026
Politics
National Council election 2023SVP42.3% · strongest party
SVP42.3%
Mitte16.2%
FDP13.0%
SP9.8%
GLP7.2%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier103%
Cantonal tax multiplier103%
103%AG range 48%127%
Tax rank 71 of 196 in canton AargauTax burden
Single, 100'000 CHF gross income
12'685 CHF(12.7%)
Rank 67 of 196 in the canton · 434 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:12'685 CHF(~12.7%)
LengnauCanton range AargauSwitzerland median
Show data table
| Gross income | Lengnau | Aargau | Switzerland median |
|---|---|---|---|
| 40'000 | 5.1% | 3.8–5.6% | 5.4% |
| 50'000 | 6.9% | 5.2–7.7% | 7.8% |
| 60'000 | 8.4% | 6.4–9.3% | 10.5% |
| 70'000 | 9.7% | 7.4–10.7% | 11.9% |
| 80'000 | 10.8% | 8.2–11.9% | 13.1% |
| 90'000 | 11.6% | 8.9–12.8% | 14.1% |
| 100'000 | 12.7% | 9.8–14% | 15.3% |
| 110'000 | 13.6% | 10.5–14.9% | 16.3% |
| 120'000 | 14.4% | 11.2–15.8% | 17.2% |
| 130'000 | 15.1% | 11.7–16.5% | 18.1% |
| 140'000 | 15.8% | 12.4–17.3% | 19% |
| 150'000 | 16.5% | 13–18% | 19.7% |
| 175'000 | 18.1% | 14.4–19.7% | 21.6% |
| 200'000 | 19.4% | 15.5–21.1% | 23.2% |
| 225'000 | 20.7% | 16.6–22.4% | 24.6% |
| 250'000 | 21.8% | 17.6–23.6% | 25.8% |
| 275'000 | 22.7% | 18.4–24.5% | 26.8% |
| 300'000 | 23.4% | 19.1–25.3% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–20209.6 °C
Precipitation 1991–20201'027 mm
9.6 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
607 m
Mean elevation
502 m
Relief
209 m
Mean slope
7.7°
Flat share
30.4%
South-facing
18.3%
Above 2000 m
0.0%
Relief 209 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
27.4 GWh/yr
Roofs + façades
35.4 GWh/yr
≈ households powered
6'100
Per inhabitant
9'314 kWh/yr
27 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 %
Second homes
7.5 %
Avg. rooms
4.2
Dwellings
1'304
Built before 194616.6%
Built since 200130.0%
0 %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
1'224
Workplaces
187
Services share
51 %
Jobs by sector: Primary 103 (8.4%) · Secondary 497 (40.6%) · Tertiary 624 (51.0%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
32
Organic share
3.1 %
Farmland
673 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 municipalities2'944 #87 AG · #740 CHGrowing municipalities-0.4% #167 AG · #1598 CHShrinking municipalities-0.4% #30 AG · #512 CHJobs per resident0.42 #55 AG · #774 CHFamilies & children21.7% #43 AG · #612 CHAge structure18.9% #120 AG · #1462 CHWomen share50.6% #24 AG · #589 CHForeign residents16.1% #146 AG · #1185 CHPopulation density232/km² #143 AG · #941 CHTax burden12'685 #68 AG · #435 CHTaxes103% #71 AGWarmest municipalities9.6 °C #149 AG · #908 CHSunniest municipalities39.9% #162 AG · #1946 CHRainiest municipalities1'027 mm #161 AG · #1505 CHVoter turnout57.6% #55 AG · #741 CHAgainst Switzerland16% #82 AG · #866 CHAligned with Switzerland84% #96 AG · #608 CHSVP strongholds42.3% #99 AG · #544 CHSP strongholds9.8% #151 AG · #1543 CHCentre strongholds16.2% #48 AG · #746 CHFDP strongholds13% #69 AG · #1035 CHGLP strongholds7.2% #99 AG · #722 CHGreen strongholds5.9% #89 AG · #1358 CHLargest by area12.7 km² #18 AG · #762 CHHighest municipalities415 m #118 AG · #1814 CHSecond homes7.5% #114 AG · #1720 CHOrganic farming3.1% #136 AG · #1574 CHBest-connected municipalities67 min #122 AG · #1000 CHRemotest municipalities67 min #79 AG · #1127 CHHighest peaks607 m #103 AG · #1512 CHHighest-lying municipalities502 m #72 AG · #1417 CHGreatest vertical range209 m #108 AG · #1321 CHSteepest municipalities7.7° #85 AG · #1142 CHSolar potential27 GWh #71 AG · #755 CHSolar potential per capita9'314 kWh #72 AG · #1192 CHCheapest electricity29.86 Rp./kWh #186 AG · #1791 CHMost expensive electricity29.86 Rp./kWh #49 AG · #354 CH
Postal codes (1)
swisstopoLocalities
swisstopo · 1Nearby municipalities
swisstopo- What is the postal code of Lengnau?
- The postal code of Lengnau is 5426.
- What is the tax rate in Lengnau?
- The municipal tax multiplier of Lengnau is 103% (2026); canton AG levies 103%.
- How much tax do you pay in Lengnau?
- A single person without children pays about 12'685 CHF income tax in Lengnau on 100'000 CHF gross income (federal, cantonal, municipal), rank 67 of 196 in canton AG. Source: ESTV (2026).
- How many residents does Lengnau have?
- Lengnau has 2'944 residents (2025).
- How many foreign residents live in Lengnau?
- Lengnau has 475 foreign residents, a share of 16.13% (2025).
Map
OpenStreetMapLengnau compared with
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