Unterramsern: population and statistics
Unterramsern has a population of 230 (2025) across 1.5 km², or 149 people per km². It ranks 2,018 of 2,115 municipalities by population. Its population is growing: +13.3% between 2015 and 2025.
- 230 residents
- 1.5 km²
- 149 people/km²
- 476 m
Key points
Among the 106 municipalities in Solothurn, Unterramsern ranks No. 103 by population.
A 1 kWp solar panel tilted at 38° generates about 1,211 kWh a year here.
Unterramsern in numbers
Where is Unterramsern?
Population of Unterramsern over time
Unterramsern had 203 residents in 2015 and 230 in 2025.
| Year | Population |
|---|---|
| 2020 | 219 |
| 2021 | 219 |
| 2022 | 222 |
| 2023 | 220 |
| 2024 | 225 |
| 2025 | 230 |
Did you know?
- “Dwellings”: lower than in 97% of municipalities.
- “Rooftop solar electricity potential”: lower than in 97% of municipalities.
- “Establishments”: lower than in 97% of municipalities.
- Its area is roughly equal to 216 football pitches.
- The nearest more populous municipality is Buchegg (2,979 residents), 1.9 km away.
- A 4 kWp rooftop solar system here would generate about 4,844 kWh a year, roughly what an average household uses.
All indicators for Unterramsern
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 | Unterramsern | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 17.8% | 21.7% | 20.7% |
Housing
| Indicator | Unterramsern | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 109 | 148,900 | 4,927,050 | ranked 2,046 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 48.6% | 22.0% | 23.3% | ||
| Dwellings in buildings built since 2001 (2026) | 27.5% | 21.9% | 25.3% | ||
| Share of single-family houses among residential buildings (2026) | 82.3% | 70.1% | 69.5% |
Energy
| Indicator | Unterramsern | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 35.3% | 72.7% | 53.5% | ||
| Heat pumps as main heating (2026) | 7.3% | 11.4% | 13.7% | ||
| Wood heating systems (2026) | 27.9% | 8.1% | 12.4% | ||
| District heating (2026) | 20.6% | 2.7% | 1.4% | ||
| Photovoltaic installations (2026) | 24 | 11,211 | 329,600 | ranked 1,891 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 2,295 kW | 1,095 kW | 1,134 kW | ||
| Rooftop solar electricity potential (2026) | 3.3 GWh/year | 2,373 GWh/year | 64,783 GWh/year | ranked 2,042 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 14,261 kWh/inh. | 8,138 kWh/inh. | 9,356 kWh/inh. |
Economy
| Indicator | Unterramsern | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 19 | 18,596 | 728,011 | ranked 2,029 of 2,112 | |
| Entities listed in the commercial register (2026) | 13 | 18,362 | 762,757 | ranked 2,004 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 56.5 | 63.0 | 64.9 | ||
| Share of limited companies (AG, GmbH) among registered entities (2026) | 61.5% | 65.9% | 65.7% | ||
| Share of sole proprietorships among registered entities (2026) | 38.5% | 29.3% | 29.0% |
Employment
| Indicator | Unterramsern | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 64 | 151,633 | 5,679,518 | ranked 1,988 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 278.3 | 520.0 | 362.9 | ||
| Share of jobs in services (2024) | 29.7% | 67.4% | 63.6% | ||
| Share of jobs in industry and construction (2024) | 40.6% | 27.9% | 24.2% |
Society
| Indicator | Unterramsern | Solothurn | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 3.0% | 25.9% | 18.9% |
Sunshine and temperatures: Unterramsern
Frequently asked questions
What is the population of Unterramsern?
Unterramsern has 230 residents (2025), ranking 2,018 of 2,115 municipalities.
How big is Unterramsern?
Unterramsern covers 1.5 km², with a density of 149 people per km².
Is the population of Unterramsern growing?
Between 2015 and 2025, the population of Unterramsern went from 203 to 230, a change of +13.3%.
Where is Unterramsern?
Unterramsern is in Solothurn. It belongs to Bezirk Bucheggberg (district). Latitude 47.120, longitude 7.483.
Dwellings: what is the figure for Unterramsern?
In Unterramsern, “Dwellings” stands at 109 (2026), ranking 2,046 of 2,108 municipalities; the national median is 990.
Rooftop solar electricity potential: what is the figure for Unterramsern?
In Unterramsern, “Rooftop solar electricity potential” stands at 3.3 GWh/year (2026), ranking 2,042 of 2,114 municipalities; the national median is 19.0 GWh/year.
How much electricity does a solar panel produce in Unterramsern?
In Unterramsern, a 1 kWp south-facing system tilted at 38° produces about 1,211 kWh a year.
Which municipalities border Unterramsern?
The nearest to Unterramsern are Buchegg (1.9 km), Bätterkinden (4.1 km), Messen (4.1 km), Biezwil (5.0 km), Lüterkofen-Ichertswil (5.0 km).