Population
5'133↑0.5%
About Kölliken
City · Aargau
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.
Population
5'133
Tax multiplier
119%
Kölliken in numbers
Federal data — BFS (STATPOP, STATENT, land use), ESTV, BAKOM, ARE.119%↑4.4%
Top quartile in canton
Median taxable income
CHF 51'900↑2.0%
Bottom quartile in canton
Median net income
CHF 58'400↑2.5%
77%
Cantonal tax multiplier
103%↓7.2%
0.73%↓58.8%
Middle in canton
- Forest44%
- Agriculture31%
- Settlement25%
Foreign residents
24.6%↑1.7%
Above average in canton
Dwellings
2'331↑0.8%
Jobs (FTE)
1'408↓1.1%
92%
4%
Fibre
Housing market in Kölliken
The rental vacancy rate is 0.73%, 30% below the cantonal average (1.04 %) — a tight rental market. The municipal tax multiplier (Steuerfuss) is 119%, 15% above the cantonal average (104 %). Median taxable income is CHF 60'900, roughly the Swiss average (CHF 61'929). Kölliken has 5'133 residents (2025).
Source: Swiss Federal Statistical Office (BFS).
