Tresa: population and statistics
Tresa has a population of 3,147 (2025) across 11.0 km², or 285 people per km². It ranks 695 of 2,115 municipalities by population. Its population is falling: −4.1% between 2015 and 2025.
- 3,147 residents
- 11.0 km²
- 285 people/km²
- 372 m
Key points
Among the 100 municipalities in Ticino, Tresa ranks No. 26 by population.
Share of people aged 65 and over: 29.9% in Tresa, compared with an average of 24.3% in Ticino and 19.8% nationally.
Dwellings in buildings built since 2001: 8.2% in Tresa, compared with an average of 20.4% in Ticino and 24.6% nationally.
A 1 kWp solar panel tilted at 41° generates about 1,367 kWh a year here.
Tresa in numbers
Where is Tresa?
Population of Tresa over time
Tresa had 3,282 residents in 2015 and 3,147 in 2025.
| Year | Population |
|---|---|
| 2020 | 3,158 |
| 2021 | 3,140 |
| 2022 | 3,075 |
| 2023 | 3,129 |
| 2024 | 3,126 |
| 2025 | 3,147 |
Did you know?
- “Share of people aged 65 and over”: higher than in 97% of municipalities.
- “Dwellings in buildings built since 2001”: lower than in 96% of municipalities.
- “Share of jobs in industry and construction”: higher than in 93% of municipalities.
- Its area is roughly equal to 1,546 football pitches.
- The nearest municipality is Lema, 3.5 km away.
- The nearest more populous municipality is Collina d'Oro (4,932 residents), 7.9 km away.
- A 4 kWp rooftop solar system here would generate about 5,468 kWh a year, roughly what an average household uses.
All indicators for Tresa
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 | Tresa | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 29.9% | 24.3% | 20.7% | ranked 53 of 1,811 |
Housing
| Indicator | Tresa | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 2,722 | 260,627 | 4,927,050 | ranked 428 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 39.4% | 20.3% | 23.3% | ranked 293 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 8.2% | 20.4% | 25.3% | ranked 1,728 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 67.5% | 62.1% | 69.5% | ranked 1,014 of 1,806 |
Energy
| Indicator | Tresa | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 49.1% | 59.8% | 53.5% | ranked 1,062 of 1,806 | |
| Heat pumps as main heating (2026) | 13.0% | 12.4% | 13.7% | ranked 959 of 1,806 | |
| Wood heating systems (2026) | 13.4% | 11.5% | 12.4% | ranked 847 of 1,806 | |
| District heating (2026) | 1.4% | 1.2% | 1.4% | ranked 899 of 1,806 | |
| Photovoltaic installations (2026) | 199 | 16,017 | 329,600 | ranked 520 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,143 kW | 915.9 kW | 1,134 kW | ranked 896 of 1,806 | |
| Rooftop solar electricity potential (2026) | 43.6 GWh/year | 3,370 GWh/year | 64,783 GWh/year | ranked 417 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 13,861 kWh/inh. | 9,438 kWh/inh. | 9,356 kWh/inh. | ranked 345 of 1,810 |
Economy
| Indicator | Tresa | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 361 | 40,256 | 728,011 | ranked 406 of 2,112 | |
| Entities listed in the commercial register (2026) | 316 | 42,118 | 762,757 | ranked 479 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 100.4 | 117.1 | 64.9 | ranked 191 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 57.6% | 72.1% | 65.7% | ranked 1,516 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 38.0% | 23.0% | 29.0% | ranked 238 of 1,808 |
Employment
| Indicator | Tresa | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 2,044 | 249,351 | 5,679,518 | ranked 456 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 649.5 | 698.3 | 362.9 | ranked 251 of 1,810 | |
| Share of jobs in services (2024) | 45.6% | 78.3% | 63.6% | ranked 1,467 of 1,804 | |
| Share of jobs in industry and construction (2024) | 50.0% | 20.2% | 24.2% | ranked 126 of 1,776 |
Society
| Indicator | Tresa | Ticino | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 25.4% | 29.8% | 18.9% | ranked 508 of 1,811 |
Sunshine and temperatures: Tresa
Frequently asked questions
What is the population of Tresa?
Tresa has 3,147 residents (2025), ranking 695 of 2,115 municipalities.
How big is Tresa?
Tresa covers 11.0 km², with a density of 285 people per km².
Is the population of Tresa growing?
Between 2015 and 2025, the population of Tresa went from 3,282 to 3,147, a change of −4.1%.
Where is Tresa?
Tresa is in Ticino. It belongs to Distretto di Lugano (district). Latitude 45.999, longitude 8.817.
Share of people aged 65 and over: what is the figure for Tresa?
In Tresa, “Share of people aged 65 and over” stands at 29.9% (2025), ranking 53 of 1,811 municipalities; the national median is 20.7%.
Dwellings in buildings built since 2001: what is the figure for Tresa?
In Tresa, “Dwellings in buildings built since 2001” stands at 8.2% (2026), ranking 1,728 of 1,806 municipalities; the national median is 25.3%.
How much electricity does a solar panel produce in Tresa?
In Tresa, a 1 kWp south-facing system tilted at 41° produces about 1,367 kWh a year.
Which municipalities border Tresa?
The nearest to Tresa are Lema (3.5 km), Pura (4.1 km), Aranno (4.3 km), Vernate (5.1 km), Magliaso (5.4 km).