Onsernone: population and statistics
Onsernone has a population of 643 (2025) across 27.8 km², or 23.1 people per km². It ranks 1,690 of 2,115 municipalities by population. Its population is falling: −8.3% between 2015 and 2025.
- 643 residents
- 27.8 km²
- 23 people/km²
- 662 m
Key points
Among the 100 municipalities in Ticino, Onsernone ranks No. 82 by population.
Share of people aged 65 and over: 42.5% in Onsernone, compared with an average of 24.3% in Ticino and 19.8% nationally.
Dwellings in buildings built since 2001: 0.7% in Onsernone, compared with an average of 20.4% in Ticino and 24.6% nationally.
A 1 kWp solar panel tilted at 24° generates about 950 kWh a year here.
Onsernone in numbers
Where is Onsernone?
Population of Onsernone over time
Onsernone had 701 residents in 2015 and 643 in 2025.
| Year | Population |
|---|---|
| 2020 | 663 |
| 2021 | 682 |
| 2022 | 675 |
| 2023 | 663 |
| 2024 | 663 |
| 2025 | 643 |
Did you know?
- “Share of people aged 65 and over”: higher than in 99% of municipalities.
- “Dwellings in buildings built since 2001”: lower than in 99% of municipalities.
- “Oil or gas heating systems”: lower than in 99% of municipalities.
- Its area is roughly equal to 3,895 football pitches.
- Its population density is 10.1 times lower than the national average.
- The nearest more populous municipality is Centovalli (1,049 residents), 5.1 km away.
- A 4 kWp rooftop solar system here would generate about 3,800 kWh a year, roughly what an average household uses.
All indicators for Onsernone
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 | Onsernone | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 42.5% | 24.3% | 20.7% | ranked 2 of 1,811 |
Housing
| Indicator | Onsernone | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 1,534 | 260,627 | 4,927,050 | ranked 767 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 59.5% | 20.3% | 23.3% | ranked 40 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 0.7% | 20.4% | 25.3% | ranked 1,806 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 83.0% | 62.1% | 69.5% | ranked 101 of 1,806 |
Energy
| Indicator | Onsernone | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 7.5% | 59.8% | 53.5% | ranked 1,804 of 1,806 | |
| Heat pumps as main heating (2026) | 2.8% | 12.4% | 13.7% | ranked 1,768 of 1,806 | |
| Wood heating systems (2026) | 57.8% | 11.5% | 12.4% | ranked 31 of 1,806 | |
| District heating (2026) | 0.0% | 1.2% | 1.4% | ranked 1,506 of 1,806 | |
| Photovoltaic installations (2026) | 11 | 16,017 | 329,600 | ranked 2,024 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 182.1 kW | 915.9 kW | 1,134 kW | ranked 1,793 of 1,806 | |
| Rooftop solar electricity potential (2026) | 16.7 GWh/year | 3,370 GWh/year | 64,783 GWh/year | ranked 1,163 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 26,019 kWh/inh. | 9,438 kWh/inh. | 9,356 kWh/inh. | ranked 29 of 1,810 |
Economy
| Indicator | Onsernone | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 77 | 40,256 | 728,011 | ranked 1,437 of 2,112 | |
| Entities listed in the commercial register (2026) | 38 | 42,118 | 762,757 | ranked 1,713 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 59.1 | 117.1 | 64.9 | ranked 1,163 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 57.9% | 72.1% | 65.7% | ranked 1,500 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 36.8% | 23.0% | 29.0% | ranked 290 of 1,808 |
Employment
| Indicator | Onsernone | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 233 | 249,351 | 5,679,518 | ranked 1,544 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 362.4 | 698.3 | 362.9 | ranked 907 of 1,810 | |
| Share of jobs in services (2024) | 79.0% | 78.3% | 63.6% | ranked 351 of 1,804 | |
| Share of jobs in industry and construction (2024) | 9.4% | 20.2% | 24.2% | ranked 1,579 of 1,776 |
Society
| Indicator | Onsernone | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 9.6% | 29.8% | 18.9% | ranked 1,554 of 1,811 |
Sunshine and temperatures: Onsernone
Frequently asked questions
What is the population of Onsernone?
Onsernone has 643 residents (2025), ranking 1,690 of 2,115 municipalities.
How big is Onsernone?
Onsernone covers 27.8 km², with a density of 23 people per km².
Is the population of Onsernone growing?
Between 2015 and 2025, the population of Onsernone went from 701 to 643, a change of −8.3%.
Where is Onsernone?
Onsernone is in Ticino. It belongs to Distretto di Locarno (district). Latitude 46.200, longitude 8.617.
Share of people aged 65 and over: what is the figure for Onsernone?
In Onsernone, “Share of people aged 65 and over” stands at 42.5% (2025), ranking 2 of 1,811 municipalities; the national median is 20.7%.
Dwellings in buildings built since 2001: what is the figure for Onsernone?
In Onsernone, “Dwellings in buildings built since 2001” stands at 0.7% (2026), ranking 1,806 of 1,806 municipalities; the national median is 25.3%.
How much electricity does a solar panel produce in Onsernone?
In Onsernone, a 1 kWp south-facing system tilted at 24° produces about 950 kWh a year.
Which municipalities border Onsernone?
The nearest to Onsernone are Centovalli (5.1 km), Maggia (8.8 km), Terre di Pedemonte (9.2 km), Losone (10 km), Avegno Gordevio (10 km).