Lengnau (AG): population and statistics
Lengnau (AG) has a population of 2,944 (2025) across 12.7 km², or 232 people per km². It ranks 741 of 2,115 municipalities by population. Its population is growing: +10.4% between 2015 and 2025.
- 2,944 residents
- 12.7 km²
- 232 people/km²
- 419 m
Key points
Among the 197 municipalities in Aargau, Lengnau (AG) ranks No. 87 by population.
Share of jobs in industry and construction: 40.6% in Lengnau (AG), compared with an average of 26.5% in Aargau and 22.0% nationally.
District heating: 6.6% in Lengnau (AG), compared with an average of 6.5% in Aargau and 7.3% nationally.
A 1 kWp solar panel tilted at 37° generates about 1,149 kWh a year here.
Lengnau (AG) in numbers
Where is Lengnau (AG)?
Population of Lengnau (AG) over time
Lengnau (AG) had 2,667 residents in 2015 and 2,944 in 2025.
| Year | Population |
|---|---|
| 2020 | 2,770 |
| 2021 | 2,864 |
| 2022 | 2,866 |
| 2023 | 2,929 |
| 2024 | 2,955 |
| 2025 | 2,944 |
Did you know?
- Its area is roughly equal to 1,775 football pitches.
- The nearest municipality is Freienwil, 2.2 km away.
- The nearest more populous municipality is Ehrendingen (4,919 residents), 2.7 km away.
- A 4 kWp rooftop solar system here would generate about 4,596 kWh a year, roughly what an average household uses.
All indicators for Lengnau (AG)
Value for the municipality, then the regional average and the national median (for counts: regional and national totals). The gauge places the municipality between the lowest and highest value in the country.
Population
| Indicator | Lengnau (AG) | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 18.9% | 19.5% | 20.7% | ranked 1,224 of 1,811 |
Housing
| Indicator | Lengnau (AG) | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 1,319 | 355,613 | 4,927,050 | ranked 866 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 16.9% | 16.6% | 23.3% | ranked 1,249 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 30.6% | 30.9% | 25.3% | ranked 554 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 71.5% | 70.4% | 69.5% | ranked 784 of 1,806 |
Energy
| Indicator | Lengnau (AG) | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 59.7% | 66.6% | 53.5% | ranked 698 of 1,806 | |
| Heat pumps as main heating (2026) | 10.7% | 11.6% | 13.7% | ranked 1,164 of 1,806 | |
| Wood heating systems (2026) | 12.2% | 8.3% | 12.4% | ranked 916 of 1,806 | |
| District heating (2026) | 6.6% | 6.5% | 1.4% | ranked 378 of 1,806 | |
| Photovoltaic installations (2026) | 142 | 26,039 | 329,600 | ranked 769 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,262 kW | 997.1 kW | 1,134 kW | ranked 762 of 1,806 | |
| Rooftop solar electricity potential (2026) | 27.4 GWh/year | 5,431 GWh/year | 64,783 GWh/year | ranked 755 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 9,314 kWh/inh. | 7,302 kWh/inh. | 9,356 kWh/inh. | ranked 910 of 1,810 |
Economy
| Indicator | Lengnau (AG) | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 187 | 47,193 | 728,011 | ranked 806 of 2,112 | |
| Entities listed in the commercial register (2026) | 180 | 46,143 | 762,757 | ranked 801 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 61.1 | 62.0 | 64.9 | ranked 1,063 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 66.7% | 66.6% | 65.7% | ranked 813 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 26.7% | 29.1% | 29.0% | ranked 1,112 of 1,808 |
Employment
| Indicator | Lengnau (AG) | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 1,224 | 364,295 | 5,679,518 | ranked 724 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 415.8 | 489.8 | 362.9 | ranked 715 of 1,810 | |
| Share of jobs in services (2024) | 51.0% | 69.1% | 63.6% | ranked 1,316 of 1,804 | |
| Share of jobs in industry and construction (2024) | 40.6% | 26.5% | 24.2% | ranked 285 of 1,776 |
Society
| Indicator | Lengnau (AG) | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 16.1% | 28.1% | 18.9% | ranked 1,109 of 1,811 |
Sunshine and temperatures: Lengnau (AG)
Frequently asked questions
What is the population of Lengnau (AG)?
Lengnau (AG) has 2,944 residents (2025), ranking 741 of 2,115 municipalities.
How big is Lengnau (AG)?
Lengnau (AG) covers 12.7 km², with a density of 232 people per km².
Is the population of Lengnau (AG) growing?
Between 2015 and 2025, the population of Lengnau (AG) went from 2,667 to 2,944, a change of +10.4%.
Where is Lengnau (AG)?
Lengnau (AG) is in Aargau. It belongs to Bezirk Zurzach (district). Latitude 47.522, longitude 8.331.
Share of jobs in industry and construction: what is the figure for Lengnau (AG)?
In Lengnau (AG), “Share of jobs in industry and construction” stands at 40.6% (2024), ranking 285 of 1,776 municipalities; the national median is 24.2%.
District heating: what is the figure for Lengnau (AG)?
In Lengnau (AG), “District heating” stands at 6.6% (2026), ranking 378 of 1,806 municipalities; the national median is 1.4%.
How much electricity does a solar panel produce in Lengnau (AG)?
In Lengnau (AG), a 1 kWp south-facing system tilted at 37° produces about 1,149 kWh a year.
Which municipalities border Lengnau (AG)?
The nearest to Lengnau (AG) are Freienwil (2.2 km), Ehrendingen (2.7 km), Schneisingen (2.7 km), Endingen (3.5 km), Niederweningen (4.0 km).