About Therwil
Therwil is a municipality in the district of Arlesheim in the canton of Basel-Country in Switzerland.
- Canton
- Basel-Landschaft
- Area
- 7.7 km²
Population
10'125residents
Median taxable income
CHF 79'984
Vacancy
0.86%
Foreign residents
19.6%
Dwellings
4'884
Jobs (FTE)
3'140
Tax multiplier
52%
Land use across the commune
Every 100 × 100 m of Therwil, coloured by how it's used. Drawn from the BFS Arealstatistik 2025 release — the most recent nationwide snapshot.
Source BFS Arealstatistik
Loading statistics …
Jobs & economy
3'140 full-time-equivalent jobs across 537 businesses — services make up 78% of employment, industry 18% (2018).
Source BFS STATENT
3'140FTE total
Primary3.3%
Secondary18.5%
Tertiary78.2%
Land use
30% built-up, 45% agricultural, 24% forest. Measured across 766 hectares (2018).
Source BFS Arealstatistik
Settlement29.9%
Agriculture45.6%
Forest24.5%
Water0.0%
Election Results
SVP led the 2023 National Council election with 25.5%, ahead of SP at 22.8%.
Source BFS
SVP25.5%+1.0 pp
SP22.8%+3.0 pp
FDP16.3%−1.6 pp
Mitte15.3%
Grüne9.1%−7.4 pp
GLP7.8%+1.1 pp
EVP1.9%±0 pp
Others
0.3%
2023 vs 2019
Primary / second-home mix
92.4% of dwellings are primary residences; 7.6% are second homes (2026).
Source BFS
Primary residences92.4%
Second homes7.6%
Climate data
Annual mean 10.9°C with 842 mm of rain. Warmest in July (20.2°C), coldest in January (2.2°C). Station: Basel / Binningen, 316 m.
Source MeteoSchweiz
10.9°C
Annual mean
Mean 10.9°C
Rain 842 mm
Sun ≈141 days
Basel / Binningen · 316 m.a.s.l. · 1991–2020 normals
Warming trend
Mean annual temperature at Basel / Binningen has risen by +2.4°C between the first 30 observed years (1755–1784) and the most recent (1996–2025).
Source MeteoSchweiz NBCN
+2.4°C
mean 1996–2025 vs. 1755–1784
Basel / Binningen · 316 m.a.s.l. · 1755–2025
