Kölliken: population and statistics
Kölliken has a population of 5,133 (2025) across 8.9 km², or 577 people per km². It ranks 423 of 2,115 municipalities by population. Its population is growing: +20.2% between 2015 and 2025.
- 5,133 residents
- 8.9 km²
- 577 people/km²
- 429 m
Key points
Among the 197 municipalities in Aargau, Kölliken ranks No. 38 by population.
Share of single-family houses among residential buildings: 79.6% in Kölliken, compared with an average of 70.4% in Aargau and 56.9% nationally.
Oil or gas heating systems: 73.3% in Kölliken, compared with an average of 66.6% in Aargau and 61.7% nationally.
A 1 kWp solar panel tilted at 37° generates about 1,150 kWh a year here.
Kölliken in numbers
Where is Kölliken?
Population of Kölliken over time
Kölliken had 4,272 residents in 2015 and 5,133 in 2025.
| Year | Population |
|---|---|
| 2020 | 4,559 |
| 2021 | 4,659 |
| 2022 | 4,757 |
| 2023 | 5,035 |
| 2024 | 5,106 |
| 2025 | 5,133 |
Did you know?
- Its area is roughly equal to 1,245 football pitches.
- Its population density is 2.5 times the national average.
- The nearest municipality is Holziken, 2.1 km away.
- The nearest more populous municipality is Oberentfelden (9,061 residents), 3.1 km away.
- A 4 kWp rooftop solar system here would generate about 4,600 kWh a year, roughly what an average household uses.
All indicators for Kölliken
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 | Kölliken | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 18.5% | 19.5% | 20.7% | ranked 1,300 of 1,811 |
Housing
| Indicator | Kölliken | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 2,349 | 355,613 | 4,927,050 | ranked 514 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 23.6% | 16.6% | 23.3% | ranked 886 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 26.3% | 30.9% | 25.3% | ranked 838 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 79.6% | 70.4% | 69.5% | ranked 240 of 1,806 |
Energy
| Indicator | Kölliken | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 73.3% | 66.6% | 53.5% | ranked 254 of 1,806 | |
| Heat pumps as main heating (2026) | 8.5% | 11.6% | 13.7% | ranked 1,363 of 1,806 | |
| Wood heating systems (2026) | 10.2% | 8.3% | 12.4% | ranked 1,043 of 1,806 | |
| District heating (2026) | 0.5% | 6.5% | 1.4% | ranked 1,244 of 1,806 | |
| Photovoltaic installations (2026) | 209 | 26,039 | 329,600 | ranked 482 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,107 kW | 997.1 kW | 1,134 kW | ranked 941 of 1,806 | |
| Rooftop solar electricity potential (2026) | 41.5 GWh/year | 5,431 GWh/year | 64,783 GWh/year | ranked 439 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 8,093 kWh/inh. | 7,302 kWh/inh. | 9,356 kWh/inh. | ranked 1,159 of 1,810 |
Economy
| Indicator | Kölliken | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 314 | 47,193 | 728,011 | ranked 482 of 2,112 | |
| Entities listed in the commercial register (2026) | 312 | 46,143 | 762,757 | ranked 488 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 60.8 | 62.0 | 64.9 | ranked 1,075 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 63.1% | 66.6% | 65.7% | ranked 1,144 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 31.4% | 29.1% | 29.0% | ranked 688 of 1,808 |
Employment
| Indicator | Kölliken | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 1,867 | 364,295 | 5,679,518 | ranked 500 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 363.7 | 489.8 | 362.9 | ranked 900 of 1,810 | |
| Share of jobs in services (2024) | 76.1% | 69.1% | 63.6% | ranked 437 of 1,804 | |
| Share of jobs in industry and construction (2024) | 21.3% | 26.5% | 24.2% | ranked 1,024 of 1,776 |
Society
| Indicator | Kölliken | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 24.6% | 28.1% | 18.9% | ranked 549 of 1,811 |
Sunshine and temperatures: Kölliken
Frequently asked questions
What is the population of Kölliken?
Kölliken has 5,133 residents (2025), ranking 423 of 2,115 municipalities.
How big is Kölliken?
Kölliken covers 8.9 km², with a density of 577 people per km².
Is the population of Kölliken growing?
Between 2015 and 2025, the population of Kölliken went from 4,272 to 5,133, a change of +20.2%.
Where is Kölliken?
Kölliken is in Aargau. It belongs to Bezirk Zofingen (district). Latitude 47.337, longitude 8.024.
Share of single-family houses among residential buildings: what is the figure for Kölliken?
In Kölliken, “Share of single-family houses among residential buildings” stands at 79.6% (2026), ranking 240 of 1,806 municipalities; the national median is 69.5%.
Oil or gas heating systems: what is the figure for Kölliken?
In Kölliken, “Oil or gas heating systems” stands at 73.3% (2026), ranking 254 of 1,806 municipalities; the national median is 53.5%.
How much electricity does a solar panel produce in Kölliken?
In Kölliken, a 1 kWp south-facing system tilted at 37° produces about 1,150 kWh a year.
Which municipalities border Kölliken?
The nearest to Kölliken are Holziken (2.1 km), Muhen (2.3 km), Hirschthal (2.8 km), Gretzenbach (3.0 km), Oberentfelden (3.1 km).