Unterkulm: population and statistics
Unterkulm has a population of 3,807 (2025) across 8.9 km², or 429 people per km². It ranks 586 of 2,115 municipalities by population. Its population is growing: +28.2% between 2015 and 2025.
- 3,807 residents
- 8.9 km²
- 429 people/km²
- 464 m
Key points
Among the 197 municipalities in Aargau, Unterkulm ranks No. 68 by population.
Share of foreign nationals: 33.4% in Unterkulm, compared with an average of 28.1% in Aargau and 27.7% nationally.
Share of single-family houses among residential buildings: 78.3% in Unterkulm, compared with an average of 70.4% in Aargau and 56.9% nationally.
A 1 kWp solar panel tilted at 37° generates about 1,147 kWh a year here.
Unterkulm in numbers
Where is Unterkulm?
Population of Unterkulm over time
Unterkulm had 2,970 residents in 2015 and 3,807 in 2025.
| Year | Population |
|---|---|
| 2020 | 3,343 |
| 2021 | 3,462 |
| 2022 | 3,519 |
| 2023 | 3,600 |
| 2024 | 3,801 |
| 2025 | 3,807 |
Did you know?
- “Share of foreign nationals”: higher than in 90% of municipalities.
- Its area is roughly equal to 1,244 football pitches.
- The nearest municipality is Oberkulm, 1.5 km away.
- The nearest more populous municipality is Seon (5,716 residents), 5.0 km away.
- A 4 kWp rooftop solar system here would generate about 4,588 kWh a year, roughly what an average household uses.
All indicators for Unterkulm
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 | Unterkulm | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 19.1% | 19.5% | 20.7% | ranked 1,194 of 1,811 |
Housing
| Indicator | Unterkulm | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 1,781 | 355,613 | 4,927,050 | ranked 671 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 19.4% | 16.6% | 23.3% | ranked 1,092 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 35.0% | 30.9% | 25.3% | ranked 329 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 78.3% | 70.4% | 69.5% | ranked 311 of 1,806 |
Energy
| Indicator | Unterkulm | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 54.0% | 66.6% | 53.5% | ranked 890 of 1,806 | |
| Heat pumps as main heating (2026) | 13.7% | 11.6% | 13.7% | ranked 906 of 1,806 | |
| Wood heating systems (2026) | 17.8% | 8.3% | 12.4% | ranked 627 of 1,806 | |
| District heating (2026) | 3.5% | 6.5% | 1.4% | ranked 585 of 1,806 | |
| Photovoltaic installations (2026) | 131 | 26,039 | 329,600 | ranked 857 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 933.7 kW | 997.1 kW | 1,134 kW | ranked 1,201 of 1,806 | |
| Rooftop solar electricity potential (2026) | 28.5 GWh/year | 5,431 GWh/year | 64,783 GWh/year | ranked 715 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 7,494 kWh/inh. | 7,302 kWh/inh. | 9,356 kWh/inh. | ranked 1,282 of 1,810 |
Economy
| Indicator | Unterkulm | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 228 | 47,193 | 728,011 | ranked 674 of 2,112 | |
| Entities listed in the commercial register (2026) | 204 | 46,143 | 762,757 | ranked 724 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 53.6 | 62.0 | 64.9 | ranked 1,388 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 60.8% | 66.6% | 65.7% | ranked 1,324 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 35.3% | 29.1% | 29.0% | ranked 372 of 1,808 |
Employment
| Indicator | Unterkulm | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 1,205 | 364,295 | 5,679,518 | ranked 731 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 316.5 | 489.8 | 362.9 | ranked 1,088 of 1,810 | |
| Share of jobs in services (2024) | 57.7% | 69.1% | 63.6% | ranked 1,106 of 1,804 | |
| Share of jobs in industry and construction (2024) | 36.3% | 26.5% | 24.2% | ranked 394 of 1,776 |
Society
| Indicator | Unterkulm | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 33.4% | 28.1% | 18.9% | ranked 180 of 1,811 |
Sunshine and temperatures: Unterkulm
Frequently asked questions
What is the population of Unterkulm?
Unterkulm has 3,807 residents (2025), ranking 586 of 2,115 municipalities.
How big is Unterkulm?
Unterkulm covers 8.9 km², with a density of 429 people per km².
Is the population of Unterkulm growing?
Between 2015 and 2025, the population of Unterkulm went from 2,970 to 3,807, a change of +28.2%.
Where is Unterkulm?
Unterkulm is in Aargau. It belongs to Bezirk Kulm (district). Latitude 47.312, longitude 8.115.
Share of foreign nationals: what is the figure for Unterkulm?
In Unterkulm, “Share of foreign nationals” stands at 33.4% (2025), ranking 180 of 1,811 municipalities; the national median is 18.9%.
Share of single-family houses among residential buildings: what is the figure for Unterkulm?
In Unterkulm, “Share of single-family houses among residential buildings” stands at 78.3% (2026), ranking 311 of 1,806 municipalities; the national median is 69.5%.
How much electricity does a solar panel produce in Unterkulm?
In Unterkulm, a 1 kWp south-facing system tilted at 37° produces about 1,147 kWh a year.
Which municipalities border Unterkulm?
The nearest to Unterkulm are Oberkulm (1.5 km), Teufenthal (AG) (2.2 km), Schlossrued (2.9 km), Dürrenäsch (3.3 km), Zetzwil (3.9 km).