Bolken is a municipality in the district of Wasseramt in the canton of Solothurn in Switzerland.

[3] Bolken has an area, as of 2009[update], of 2.12 square kilometers (0.82 sq mi).

Of the rest of the land, 0.26 km2 (0.10 sq mi) or 12.3% is settled (buildings or roads), 0.04 km2 (9.9 acres) or 1.9% is either rivers or lakes.

[4] The municipality is located in the Wasseramt district, on the moraine landscape left behind by the Rhone glacier.

It lies on the border with the Canton of Bern and consists of the haufendorf village (an irregular, unplanned and quite closely packed village, built around a central square) of Bolken and the Inkwilersee (Inkwiler lake).

The blazon of the municipal coat of arms is Gules a Ploughshare Argent between two Mullets of Five of the last in chief.

[8] Most of the population (as of 2000[update]) speaks German (465 or 95.1%), with French being second most common (9 or 1.8%) and Albanian being third (6 or 1.2%).

[7] The age distribution, as of 2000[update], in Bolken is; 52 children or 10.6% of the population are between 0 and 6 years old and 92 teenagers or 18.8% are between 7 and 19.

[8] The historical population is given in the following chart:[3][13] It is home to one or more prehistoric pile-dwelling (or stilt house) settlements that are part of the Prehistoric Pile dwellings around the Alps UNESCO World Heritage Site.

[14] The Inkwilersee, a paleolithic, neolithic and Bronze Age lake shore settlement, is listed as a Swiss heritage site of national significance.

[15] In the 2007 federal election the most popular party was the CVP which received 22.52% of the vote.

In the federal election, a total of 173 votes were cast, and the voter turnout was 46.5%.

[8] There were 272 residents of the municipality who were employed in some capacity, of which females made up 44.9% of the workforce.

[8] From the 2000 census[update], 147 or 30.1% were Roman Catholic, while 235 or 48.1% belonged to the Swiss Reformed Church.