About Kölliken
Kölliken is a municipality in the district of Zofingen in the canton of Aargau in Switzerland. It was also home to one of the two most toxic hazardous waste landfills in all of Switzerland. The other site is in Bonfol, Canton Jura.
- Canton
- Aargau
- Area
- 8.9 km²
Population
5'106residents
Median taxable income
CHF 67'219
Vacancy
1.77%
Foreign residents
24.2%
Dwellings
2'316
Jobs (FTE)
1'528
Tax multiplier
114%
Land use across the commune
Every 100 × 100 m of Kölliken, 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
1'528 full-time-equivalent jobs across 296 businesses — services make up 69% of employment, industry 28% (2018).
Source BFS STATENT
1'528FTE total
Primary3.1%
Secondary28.0%
Tertiary68.8%
Land use
25% built-up, 31% agricultural, 44% forest. Measured across 885 hectares (2018).
Source BFS Arealstatistik
Settlement25.1%
Agriculture31.2%
Forest43.7%
Water0.0%
Election Results
SVP led the 2023 National Council election with 42.1%, ahead of SP at 15.1%.
Source BFS
SVP42.1%+5.1 pp
SP15.1%−2.9 pp
FDP9.9%−0.9 pp
EVP7.8%−1.1 pp
Mitte7.4%
Grüne6.9%−3.0 pp
GLP4.8%+0.4 pp
Others
1.4%
2023 vs 2019
Primary / second-home mix
91.7% of dwellings are primary residences; 8.3% are second homes (2026).
Source BFS
Primary residences91.7%
Second homes8.3%
Climate data
Annual mean 10.0°C with 920 mm of rain. Warmest in July (19.4°C), coldest in January (1.2°C). Station: Buchs / Aarau, 387 m.
Source MeteoSchweiz
10.0°C
Annual mean
Mean 10.0°C
Rain 920 mm
Sun ≈127 days
Buchs / Aarau · 387 m.a.s.l. · 1991–2020 normals
Warming trend
Mean annual temperature at Luzern has risen by +2.4°C between the first 30 observed years (1871–1900) and the most recent (1996–2025).
Source MeteoSchweiz NBCN
+2.4°C
mean 1996–2025 vs. 1871–1900
Luzern · 454 m.a.s.l. · 1871–2025
