Gretzenbach: population and statistics
Gretzenbach has a population of 2,825 (2025) across 5.8 km², or 485 people per km². It ranks 763 of 2,115 municipalities by population. Its population is growing: +6.9% between 2015 and 2025.
- 2,825 residents
- 5.8 km²
- 485 people/km²
- 401 m
Key points
Among the 106 municipalities in Solothurn, Gretzenbach ranks No. 32 by population.
Share of single-family houses among residential buildings: 82.0% in Gretzenbach, compared with an average of 70.1% in Solothurn and 56.9% nationally.
Share of jobs in industry and construction: 48.4% in Gretzenbach, compared with an average of 27.9% in Solothurn and 22.0% nationally.
A 1 kWp solar panel tilted at 37° generates about 1,151 kWh a year here.
Gretzenbach in numbers
Where is Gretzenbach?
Population of Gretzenbach over time
Gretzenbach had 2,643 residents in 2015 and 2,825 in 2025.
| Year | Population |
|---|---|
| 2020 | 2,772 |
| 2021 | 2,758 |
| 2022 | 2,759 |
| 2023 | 2,800 |
| 2024 | 2,789 |
| 2025 | 2,825 |
Did you know?
- “Share of single-family houses among residential buildings”: higher than in 92% of municipalities.
- “Share of jobs in industry and construction”: higher than in 92% of municipalities.
- Its area is roughly equal to 817 football pitches.
- Its population density is 2.1 times the national average.
- The nearest municipality is Däniken, 1.3 km away.
- The nearest more populous municipality is Schönenwerd (5,437 residents), 1.6 km away.
- A 4 kWp rooftop solar system here would generate about 4,604 kWh a year, roughly what an average household uses.
All indicators for Gretzenbach
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 | Gretzenbach | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 21.7% | 21.7% | 20.7% | ranked 746 of 1,811 |
Housing
| Indicator | Gretzenbach | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 1,295 | 148,900 | 4,927,050 | ranked 879 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 19.3% | 22.0% | 23.3% | ranked 1,098 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 24.6% | 21.9% | 25.3% | ranked 945 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 82.0% | 70.1% | 69.5% | ranked 137 of 1,806 |
Energy
| Indicator | Gretzenbach | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 65.4% | 72.7% | 53.5% | ranked 509 of 1,806 | |
| Heat pumps as main heating (2026) | 8.0% | 11.4% | 13.7% | ranked 1,409 of 1,806 | |
| Wood heating systems (2026) | 9.1% | 8.1% | 12.4% | ranked 1,131 of 1,806 | |
| District heating (2026) | 3.9% | 2.7% | 1.4% | ranked 546 of 1,806 | |
| Photovoltaic installations (2026) | 97 | 11,211 | 329,600 | ranked 1,111 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,145 kW | 1,095 kW | 1,134 kW | ranked 893 of 1,806 | |
| Rooftop solar electricity potential (2026) | 29.0 GWh/year | 2,373 GWh/year | 64,783 GWh/year | ranked 704 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 10,273 kWh/inh. | 8,138 kWh/inh. | 9,356 kWh/inh. | ranked 752 of 1,810 |
Economy
| Indicator | Gretzenbach | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 167 | 18,596 | 728,011 | ranked 898 of 2,112 | |
| Entities listed in the commercial register (2026) | 209 | 18,362 | 762,757 | ranked 710 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 74.0 | 63.0 | 64.9 | ranked 598 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 66.5% | 65.9% | 65.7% | ranked 839 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 30.6% | 29.3% | 29.0% | ranked 757 of 1,808 |
Employment
| Indicator | Gretzenbach | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 895 | 151,633 | 5,679,518 | ranked 882 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 316.8 | 520.0 | 362.9 | ranked 1,085 of 1,810 | |
| Share of jobs in services (2024) | 48.4% | 67.4% | 63.6% | ranked 1,412 of 1,804 | |
| Share of jobs in industry and construction (2024) | 48.4% | 27.9% | 24.2% | ranked 141 of 1,776 |
Society
| Indicator | Gretzenbach | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 26.4% | 25.9% | 18.9% | ranked 457 of 1,811 |
Sunshine and temperatures: Gretzenbach
Frequently asked questions
What is the population of Gretzenbach?
Gretzenbach has 2,825 residents (2025), ranking 763 of 2,115 municipalities.
How big is Gretzenbach?
Gretzenbach covers 5.8 km², with a density of 485 people per km².
Is the population of Gretzenbach growing?
Between 2015 and 2025, the population of Gretzenbach went from 2,643 to 2,825, a change of +6.9%.
Where is Gretzenbach?
Gretzenbach is in Solothurn. It belongs to Bezirk Olten (district). Latitude 47.358, longitude 7.999.
Share of single-family houses among residential buildings: what is the figure for Gretzenbach?
In Gretzenbach, “Share of single-family houses among residential buildings” stands at 82.0% (2026), ranking 137 of 1,806 municipalities; the national median is 69.5%.
Share of jobs in industry and construction: what is the figure for Gretzenbach?
In Gretzenbach, “Share of jobs in industry and construction” stands at 48.4% (2024), ranking 141 of 1,776 municipalities; the national median is 24.2%.
How much electricity does a solar panel produce in Gretzenbach?
In Gretzenbach, a 1 kWp south-facing system tilted at 37° produces about 1,151 kWh a year.
Which municipalities border Gretzenbach?
The nearest to Gretzenbach are Däniken (1.3 km), Schönenwerd (1.6 km), Niedergösgen (1.8 km), Eppenberg-Wöschnau (2.9 km), Kölliken (3.0 km).