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

Wiliberg has an area, as of 2009[update], of 1.17 square kilometers (0.45 sq mi).

[3] The blazon of the municipal coat of arms is Per fess Argent a Vine branch Vert leaved of two of the same and fructed Azure and Azure a base-semi Mill-Wheel Or.

[7] The age distribution, as of 2008[update], in Wiliberg is; 20 children or 12.5% of the population are between 0 and 9 years old and 20 teenagers or 12.5% are between 10 and 19.

In the federal election, a total of 70 votes were cast, and the voter turnout was 57.4%.

[11] The historical population is given in the following table:[8] As of  2007[update], Wiliberg had an unemployment rate of 0.66%.

[7] From the 2000 census[update], 21 or 13.9% were Roman Catholic, while 121 or 80.1% belonged to the Swiss Reformed Church.