About Tresa
Tresa is a municipality in the district of Lugano in the canton of Ticino in Switzerland. It was created on 18 April 2021 through the merger of Croglio, Monteggio, Ponte Tresa and Sessa.
- Canton
- Ticino
- Area
- 11.2 km²
Population
3'126residents
Median taxable income
CHF 53'125
Vacancy
4.82%
Foreign residents
25.0%
Dwellings
2'697
Tax multiplier
85%
Land use across the commune
Every 100 × 100 m of Tresa, coloured by how it's used. Drawn from the BFS Arealstatistik 2025 release — the most recent nationwide snapshot.
Source BFS Arealstatistik
Loading statistics …
Land use
20% built-up, 21% agricultural, 58% forest. Measured across 1'103 hectares (2018).
Source BFS Arealstatistik
Settlement20.3%
Agriculture21.0%
Forest58.7%
Water0.0%
Election Results
SVP led the 2023 National Council election with 26.1%, ahead of Mitte at 16.7%.
Source BFS
SVP26.1%+5.2 pp
Mitte16.7%
FDP16.6%−1.1 pp
Grüne10.6%−0.9 pp
SP9.8%−1.2 pp
Lega
9.7%−3.5 pp
GLP1.7%+0.6 pp
2023 vs 2019
Primary / second-home mix
59.4% of dwellings are primary residences; 40.6% are second homes (2026). The Zweitwohnungsgesetz applies here — new second-home construction is restricted.
Source BFS
Primary residences59.4%
Second homes40.6%
Second-home quota > 20% — Zweitwohnungsgesetz applies
Climate data
Annual mean 13.0°C with 1'567 mm of rain. Warmest in July (22.6°C), coldest in January (3.8°C). Station: Lugano, 273 m.
Source MeteoSchweiz
13.0°C
Annual mean
Mean 13.0°C
Rain 1567 mm
Sun ≈177 days
Lugano · 273 m.a.s.l. · 1991–2020 normals
Warming trend
Mean annual temperature at Lugano has risen by +1.9°C between the first 30 observed years (1864–1893) and the most recent (1996–2025).
Source MeteoSchweiz NBCN
+1.9°C
mean 1996–2025 vs. 1864–1893
Lugano · 273 m.a.s.l. · 1864–2025
