Birr: population and statistics
Birr has a population of 4,868 (2025) across 5.0 km², or 964 people per km². It ranks 453 of 2,115 municipalities by population. Its population is growing: +10.6% between 2015 and 2025.
- 4,868 residents
- 5.0 km²
- 964 people/km²
- 404 m
Key points
Among the 197 municipalities in Aargau, Birr ranks No. 45 by population.
Share of foreign nationals: 46.3% in Birr, compared with an average of 28.1% in Aargau and 27.7% nationally.
Entities in the commercial register per 1,000 inhabitants: 39.9 in Birr, compared with an average of 62.0 in Aargau and 83.6 nationally.
A 1 kWp solar panel tilted at 36° generates about 1,141 kWh a year here.
Birr in numbers
Where is Birr?
Population of Birr over time
Birr had 4,402 residents in 2015 and 4,868 in 2025.
| Year | Population |
|---|---|
| 2020 | 4,598 |
| 2021 | 4,553 |
| 2022 | 4,605 |
| 2023 | 4,718 |
| 2024 | 4,847 |
| 2025 | 4,868 |
Did you know?
- “Share of foreign nationals”: higher than in 99% of municipalities.
- “Entities in the commercial register per 1,000 inhabitants”: lower than in 97% of municipalities.
- “Dwellings in buildings built before 1946”: lower than in 95% of municipalities.
- Its area is roughly equal to 707 football pitches.
- Its population density is 4.1 times the national average.
- The nearest municipality is Lupfig, 0.7 km away.
- The nearest more populous municipality is Windisch (8,286 residents), 5.2 km away.
All indicators for Birr
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 | Birr | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 16.0% | 19.5% | 20.7% | ranked 1,634 of 1,811 |
Housing
| Indicator | Birr | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 2,070 | 355,613 | 4,927,050 | ranked 580 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 7.2% | 16.6% | 23.3% | ranked 1,716 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 25.6% | 30.9% | 25.3% | ranked 876 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 77.8% | 70.4% | 69.5% | ranked 356 of 1,806 |
Energy
| Indicator | Birr | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 76.3% | 66.6% | 53.5% | ranked 172 of 1,806 | |
| Heat pumps as main heating (2026) | 8.1% | 11.6% | 13.7% | ranked 1,400 of 1,806 | |
| Wood heating systems (2026) | 2.9% | 8.3% | 12.4% | ranked 1,619 of 1,806 | |
| District heating (2026) | 3.1% | 6.5% | 1.4% | ranked 633 of 1,806 | |
| Photovoltaic installations (2026) | 95 | 26,039 | 329,600 | ranked 1,128 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 627.7 kW | 997.1 kW | 1,134 kW | ranked 1,556 of 1,806 | |
| Rooftop solar electricity potential (2026) | 35.1 GWh/year | 5,431 GWh/year | 64,783 GWh/year | ranked 563 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 7,208 kWh/inh. | 7,302 kWh/inh. | 9,356 kWh/inh. | ranked 1,347 of 1,810 |
Economy
| Indicator | Birr | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 173 | 47,193 | 728,011 | ranked 876 of 2,112 | |
| Entities listed in the commercial register (2026) | 194 | 46,143 | 762,757 | ranked 756 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 39.9 | 62.0 | 64.9 | ranked 1,757 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 57.7% | 66.6% | 65.7% | ranked 1,511 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 38.7% | 29.1% | 29.0% | ranked 212 of 1,808 |
Employment
| Indicator | Birr | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 2,086 | 364,295 | 5,679,518 | ranked 448 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 428.5 | 489.8 | 362.9 | ranked 674 of 1,810 | |
| Share of jobs in services (2024) | 56.3% | 69.1% | 63.6% | ranked 1,152 of 1,804 | |
| Share of jobs in industry and construction (2024) | 42.9% | 26.5% | 24.2% | ranked 236 of 1,776 |
Society
| Indicator | Birr | Aargau | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 46.3% | 28.1% | 18.9% | ranked 22 of 1,811 |
Sunshine and temperatures: Birr
Frequently asked questions
What is the population of Birr?
Birr has 4,868 residents (2025), ranking 453 of 2,115 municipalities.
How big is Birr?
Birr covers 5.0 km², with a density of 964 people per km².
Is the population of Birr growing?
Between 2015 and 2025, the population of Birr went from 4,402 to 4,868, a change of +10.6%.
Where is Birr?
Birr is in Aargau. It belongs to Bezirk Brugg (district). Latitude 47.436, longitude 8.203.
Share of foreign nationals: what is the figure for Birr?
In Birr, “Share of foreign nationals” stands at 46.3% (2025), ranking 22 of 1,811 municipalities; the national median is 18.9%.
Entities in the commercial register per 1,000 inhabitants: what is the figure for Birr?
In Birr, “Entities in the commercial register per 1,000 inhabitants” stands at 39.9 (2026), ranking 1,757 of 1,811 municipalities; the national median is 64.9.
How much electricity does a solar panel produce in Birr?
In Birr, a 1 kWp south-facing system tilted at 36° produces about 1,141 kWh a year.
Which municipalities border Birr?
The nearest to Birr are Lupfig (0.7 km), Brunegg (2.1 km), Möriken-Wildegg (2.6 km), Holderbank (AG) (2.6 km), Hausen (AG) (3.1 km).