Seengen: population and statistics
Seengen has a population of 4,516 (2025) across 9.7 km², or 466 people per km². It ranks 493 of 2,115 municipalities by population. Its population is growing: +19.3% between 2015 and 2025.
- 4,516 residents
- 9.7 km²
- 466 people/km²
- 484 m
Key points
Among the 197 municipalities in Aargau, Seengen ranks No. 54 by population.
Dwellings in buildings built since 2001: 48.7% in Seengen, compared with an average of 30.9% in Aargau and 24.6% nationally.
Share of limited companies (AG, GmbH) among registered entities: 74.7% in Seengen, compared with an average of 66.6% in Aargau and 68.6% nationally.
A 1 kWp solar panel tilted at 37° generates about 1,152 kWh a year here.
Seengen in numbers
Where is Seengen?
Population of Seengen over time
Seengen had 3,787 residents in 2015 and 4,516 in 2025.
| Year | Population |
|---|---|
| 2020 | 4,122 |
| 2021 | 4,256 |
| 2022 | 4,333 |
| 2023 | 4,411 |
| 2024 | 4,494 |
| 2025 | 4,516 |
Did you know?
- “Dwellings in buildings built since 2001”: higher than in 98% of municipalities.
- Its area is roughly equal to 1,357 football pitches.
- Its population density is 2.0 times the national average.
- The nearest municipality is Boniswil, 2.0 km away.
- The nearest more populous municipality is Villmergen (8,290 residents), 3.6 km away.
- A 4 kWp rooftop solar system here would generate about 4,608 kWh a year, roughly what an average household uses.
All indicators for Seengen
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 | Seengen | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 22.9% | 19.5% | 20.7% | ranked 554 of 1,811 |
Housing
| Indicator | Seengen | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 2,176 | 355,613 | 4,927,050 | ranked 560 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 13.9% | 16.6% | 23.3% | ranked 1,418 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 48.7% | 30.9% | 25.3% | ranked 30 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 68.6% | 70.4% | 69.5% | ranked 962 of 1,806 |
Energy
| Indicator | Seengen | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 63.8% | 66.6% | 53.5% | ranked 561 of 1,806 | |
| Heat pumps as main heating (2026) | 12.3% | 11.6% | 13.7% | ranked 1,019 of 1,806 | |
| Wood heating systems (2026) | 9.5% | 8.3% | 12.4% | ranked 1,095 of 1,806 | |
| District heating (2026) | 1.0% | 6.5% | 1.4% | ranked 1,020 of 1,806 | |
| Photovoltaic installations (2026) | 233 | 26,039 | 329,600 | ranked 416 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,111 kW | 997.1 kW | 1,134 kW | ranked 934 of 1,806 | |
| Rooftop solar electricity potential (2026) | 32.3 GWh/year | 5,431 GWh/year | 64,783 GWh/year | ranked 624 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 7,146 kWh/inh. | 7,302 kWh/inh. | 9,356 kWh/inh. | ranked 1,360 of 1,810 |
Economy
| Indicator | Seengen | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 270 | 47,193 | 728,011 | ranked 563 of 2,112 | |
| Entities listed in the commercial register (2026) | 288 | 46,143 | 762,757 | ranked 531 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 63.8 | 62.0 | 64.9 | ranked 950 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 74.7% | 66.6% | 65.7% | ranked 209 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 22.2% | 29.1% | 29.0% | ranked 1,462 of 1,808 |
Employment
| Indicator | Seengen | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 1,398 | 364,295 | 5,679,518 | ranked 645 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 309.6 | 489.8 | 362.9 | ranked 1,123 of 1,810 | |
| Share of jobs in services (2024) | 77.6% | 69.1% | 63.6% | ranked 393 of 1,804 | |
| Share of jobs in industry and construction (2024) | 15.4% | 26.5% | 24.2% | ranked 1,326 of 1,776 |
Society
| Indicator | Seengen | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 12.8% | 28.1% | 18.9% | ranked 1,348 of 1,811 |
Sunshine and temperatures: Seengen
Frequently asked questions
What is the population of Seengen?
Seengen has 4,516 residents (2025), ranking 493 of 2,115 municipalities.
How big is Seengen?
Seengen covers 9.7 km², with a density of 466 people per km².
Is the population of Seengen growing?
Between 2015 and 2025, the population of Seengen went from 3,787 to 4,516, a change of +19.3%.
Where is Seengen?
Seengen is in Aargau. It belongs to Bezirk Lenzburg (district). Latitude 47.328, longitude 8.208.
Dwellings in buildings built since 2001: what is the figure for Seengen?
In Seengen, “Dwellings in buildings built since 2001” stands at 48.7% (2026), ranking 30 of 1,806 municipalities; the national median is 25.3%.
Share of limited companies (AG, GmbH) among registered entities: what is the figure for Seengen?
In Seengen, “Share of limited companies (AG, GmbH) among registered entities” stands at 74.7% (2026), ranking 209 of 1,808 municipalities; the national median is 65.7%.
How much electricity does a solar panel produce in Seengen?
In Seengen, a 1 kWp south-facing system tilted at 37° produces about 1,152 kWh a year.
Which municipalities border Seengen?
The nearest to Seengen are Boniswil (2.0 km), Hallwil (2.3 km), Egliswil (3.0 km), Leutwil (3.2 km), Sarmenstorf (3.6 km).