Kölliken is a municipality in the district of Zofingen in the canton of Aargau in Switzerland.

[4] Kölliken has an area, as of 2009[update], of 8.89 square kilometers (3.43 sq mi).

[5] The municipality is located in the Zofingen district, along Kölliker creek on the western edge of the lower Uerkental.

The blazon of the municipal coat of arms is Argent a Bear paw Sable armed of the first issuant from sinister holding a Pine tree Vert issuant from Coupeaux of the same.

[9] The age distribution, as of 2008[update], in Kölliken is; 407 children or 10.0% of the population are between 0 and 9 years old and 500 teenagers or 12.3% are between 10 and 19.

[11] About 52% of the total households were owner occupied, or in other words did not pay rent (though they may have a mortgage or a rent-to-own agreement).

[9] In the 2007 federal election the most popular party was the SVP which received 38.82% of the vote.

In the federal election, a total of 1,274 votes were cast, and the voter turnout was 44.7%.

[9] From the 2000 census[update], 838 or 21.4% were Roman Catholic, while 2,337 or 59.8% belonged to the Swiss Reformed Church.