Untersiggenthal: population and statistics
Untersiggenthal has a population of 7,875 (2025) across 8.4 km², or 942 people per km². It ranks 250 of 2,115 municipalities by population. Its population is growing: +10.0% between 2015 and 2025.
- 7,875 residents
- 8.4 km²
- 942 people/km²
- 369 m
Key points
Among the 197 municipalities in Aargau, Untersiggenthal ranks No. 27 by population.
District heating: 32.0% in Untersiggenthal, compared with an average of 6.5% in Aargau and 7.3% nationally.
Share of jobs in industry and construction: 62.5% in Untersiggenthal, compared with an average of 26.5% in Aargau and 22.0% nationally.
A 1 kWp solar panel tilted at 37° generates about 1,146 kWh a year here.
Untersiggenthal in numbers
Where is Untersiggenthal?
Population of Untersiggenthal over time
Untersiggenthal had 7,161 residents in 2015 and 7,875 in 2025.
| Year | Population |
|---|---|
| 2020 | 7,229 |
| 2021 | 7,397 |
| 2022 | 7,486 |
| 2023 | 7,615 |
| 2024 | 7,812 |
| 2025 | 7,875 |
Did you know?
- “District heating”: higher than in 99% of municipalities.
- “Share of jobs in industry and construction”: higher than in 98% of municipalities.
- “Entities in the commercial register per 1,000 inhabitants”: lower than in 96% of municipalities.
- Its area is roughly equal to 1,171 football pitches.
- Its population density is 4.1 times the national average.
- The nearest municipality is Gebenstorf, 2.7 km away.
- The nearest more populous municipality is Brugg (13,615 residents), 3.8 km away.
All indicators for Untersiggenthal
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 | Untersiggenthal | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 20.3% | 19.5% | 20.7% | ranked 975 of 1,811 |
Housing
| Indicator | Untersiggenthal | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 3,581 | 355,613 | 4,927,050 | ranked 300 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 10.9% | 16.6% | 23.3% | ranked 1,569 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 25.2% | 30.9% | 25.3% | ranked 908 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 74.2% | 70.4% | 69.5% | ranked 593 of 1,806 |
Energy
| Indicator | Untersiggenthal | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 52.5% | 66.6% | 53.5% | ranked 945 of 1,806 | |
| Heat pumps as main heating (2026) | 5.6% | 11.6% | 13.7% | ranked 1,621 of 1,806 | |
| Wood heating systems (2026) | 5.2% | 8.3% | 12.4% | ranked 1,427 of 1,806 | |
| District heating (2026) | 32.0% | 6.5% | 1.4% | ranked 28 of 1,806 | |
| Photovoltaic installations (2026) | 234 | 26,039 | 329,600 | ranked 411 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,190 kW | 997.1 kW | 1,134 kW | ranked 841 of 1,806 | |
| Rooftop solar electricity potential (2026) | 41.4 GWh/year | 5,431 GWh/year | 64,783 GWh/year | ranked 442 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 5,258 kWh/inh. | 7,302 kWh/inh. | 9,356 kWh/inh. | ranked 1,647 of 1,810 |
Economy
| Indicator | Untersiggenthal | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 320 | 47,193 | 728,011 | ranked 463 of 2,112 | |
| Entities listed in the commercial register (2026) | 329 | 46,143 | 762,757 | ranked 456 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 41.8 | 62.0 | 64.9 | ranked 1,733 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 61.7% | 66.6% | 65.7% | ranked 1,253 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 34.7% | 29.1% | 29.0% | ranked 420 of 1,808 |
Employment
| Indicator | Untersiggenthal | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 3,033 | 364,295 | 5,679,518 | ranked 327 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 385.1 | 489.8 | 362.9 | ranked 822 of 1,810 | |
| Share of jobs in services (2024) | 36.2% | 69.1% | 63.6% | ranked 1,672 of 1,804 | |
| Share of jobs in industry and construction (2024) | 62.5% | 26.5% | 24.2% | ranked 39 of 1,776 |
Society
| Indicator | Untersiggenthal | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 31.9% | 28.1% | 18.9% | ranked 226 of 1,811 |
Sunshine and temperatures: Untersiggenthal
Frequently asked questions
What is the population of Untersiggenthal?
Untersiggenthal has 7,875 residents (2025), ranking 250 of 2,115 municipalities.
How big is Untersiggenthal?
Untersiggenthal covers 8.4 km², with a density of 942 people per km².
Is the population of Untersiggenthal growing?
Between 2015 and 2025, the population of Untersiggenthal went from 7,161 to 7,875, a change of +10.0%.
Where is Untersiggenthal?
Untersiggenthal is in Aargau. It belongs to Bezirk Baden (district). Latitude 47.502, longitude 8.254.
District heating: what is the figure for Untersiggenthal?
In Untersiggenthal, “District heating” stands at 32.0% (2026), ranking 28 of 1,806 municipalities; the national median is 1.4%.
Share of jobs in industry and construction: what is the figure for Untersiggenthal?
In Untersiggenthal, “Share of jobs in industry and construction” stands at 62.5% (2024), ranking 39 of 1,776 municipalities; the national median is 24.2%.
How much electricity does a solar panel produce in Untersiggenthal?
In Untersiggenthal, a 1 kWp south-facing system tilted at 37° produces about 1,146 kWh a year.
Which municipalities border Untersiggenthal?
The nearest to Untersiggenthal are Gebenstorf (2.7 km), Obersiggenthal (3.3 km), Würenlingen (3.4 km), Windisch (3.4 km), Rüfenach (3.5 km).