Witterswil: population and statistics
Witterswil has a population of 1,475 (2025) across 2.6 km², or 557 people per km². It ranks 1,188 of 2,115 municipalities by population. Its population is falling: −1.3% between 2015 and 2025.
- 1,475 residents
- 2.6 km²
- 557 people/km²
- 340 m
Key points
Among the 106 municipalities in Solothurn, Witterswil ranks No. 55 by population.
Share of single-family houses among residential buildings: 88.0% in Witterswil, compared with an average of 70.1% in Solothurn and 56.9% nationally.
Oil or gas heating systems: 76.4% in Witterswil, compared with an average of 72.7% in Solothurn and 61.7% nationally.
A 1 kWp solar panel tilted at 37° generates about 1,135 kWh a year here.
Witterswil in numbers
Where is Witterswil?
Population of Witterswil over time
Witterswil had 1,494 residents in 2015 and 1,475 in 2025.
| Year | Population |
|---|---|
| 2020 | 1,450 |
| 2021 | 1,462 |
| 2022 | 1,446 |
| 2023 | 1,467 |
| 2024 | 1,500 |
| 2025 | 1,475 |
Did you know?
- “Share of single-family houses among residential buildings”: higher than in 99% of municipalities.
- “Oil or gas heating systems”: higher than in 91% of municipalities.
- Its area is roughly equal to 371 football pitches.
- Its population density is 2.4 times the national average.
- The nearest more populous municipality is Hofstetten-Flüh (3,410 residents), 1.2 km away.
- A 4 kWp rooftop solar system here would generate about 4,540 kWh a year, roughly what an average household uses.
All indicators for Witterswil
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 | Witterswil | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 23.5% | 21.7% | 20.7% | ranked 447 of 1,811 |
Housing
| Indicator | Witterswil | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 677 | 148,900 | 4,927,050 | ranked 1,304 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 14.2% | 22.0% | 23.3% | ranked 1,394 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 18.6% | 21.9% | 25.3% | ranked 1,330 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 88.0% | 70.1% | 69.5% | ranked 16 of 1,806 |
Energy
| Indicator | Witterswil | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 76.4% | 72.7% | 53.5% | ranked 167 of 1,806 | |
| Heat pumps as main heating (2026) | 12.6% | 11.4% | 13.7% | ranked 993 of 1,806 | |
| Wood heating systems (2026) | 3.9% | 8.1% | 12.4% | ranked 1,537 of 1,806 | |
| District heating (2026) | 1.6% | 2.7% | 1.4% | ranked 859 of 1,806 | |
| Photovoltaic installations (2026) | 94 | 11,211 | 329,600 | ranked 1,141 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,102 kW | 1,095 kW | 1,134 kW | ranked 955 of 1,806 | |
| Rooftop solar electricity potential (2026) | 12.3 GWh/year | 2,373 GWh/year | 64,783 GWh/year | ranked 1,400 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 8,325 kWh/inh. | 8,138 kWh/inh. | 9,356 kWh/inh. | ranked 1,111 of 1,810 |
Economy
| Indicator | Witterswil | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 86 | 18,596 | 728,011 | ranked 1,359 of 2,112 | |
| Entities listed in the commercial register (2026) | 71 | 18,362 | 762,757 | ranked 1,380 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 48.1 | 63.0 | 64.9 | ranked 1,576 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 74.6% | 65.9% | 65.7% | ranked 215 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 19.7% | 29.3% | 29.0% | ranked 1,606 of 1,808 |
Employment
| Indicator | Witterswil | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 570 | 151,633 | 5,679,518 | ranked 1,098 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 386.4 | 520.0 | 362.9 | ranked 816 of 1,810 | |
| Share of jobs in services (2024) | 57.0% | 67.4% | 63.6% | ranked 1,128 of 1,804 | |
| Share of jobs in industry and construction (2024) | 34.2% | 27.9% | 24.2% | ranked 473 of 1,776 |
Society
| Indicator | Witterswil | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 18.3% | 25.9% | 18.9% | ranked 954 of 1,811 |
Sunshine and temperatures: Witterswil
Frequently asked questions
What is the population of Witterswil?
Witterswil has 1,475 residents (2025), ranking 1,188 of 2,115 municipalities.
How big is Witterswil?
Witterswil covers 2.6 km², with a density of 557 people per km².
Is the population of Witterswil growing?
Between 2015 and 2025, the population of Witterswil went from 1,494 to 1,475, a change of −1.3%.
Where is Witterswil?
Witterswil is in Solothurn. It belongs to Bezirk Dorneck (district). Latitude 47.487, longitude 7.524.
Share of single-family houses among residential buildings: what is the figure for Witterswil?
In Witterswil, “Share of single-family houses among residential buildings” stands at 88.0% (2026), ranking 16 of 1,806 municipalities; the national median is 69.5%.
Oil or gas heating systems: what is the figure for Witterswil?
In Witterswil, “Oil or gas heating systems” stands at 76.4% (2026), ranking 167 of 1,806 municipalities; the national median is 53.5%.
How much electricity does a solar panel produce in Witterswil?
In Witterswil, a 1 kWp south-facing system tilted at 37° produces about 1,135 kWh a year.
Which municipalities border Witterswil?
The nearest to Witterswil are Hofstetten-Flüh (1.2 km), Bättwil (1.5 km), Ettingen (1.7 km), Biel-Benken (2.2 km), Therwil (2.4 km).