Olten District

[2] Olten has an area, as of 2009[update], of 80.55 square kilometers (31.10 sq mi).

Power and water infrastructure as well as other special developed areas made up 2.3% of the area while parks, green belts and sports fields made up 1.3%.

[3] The blazon of the municipal coat of arms is Argent three Fir Trees trunked Gules issuant from a Mount of 3 Coupeaux of the second.

[1] Most of the population (as of 2000[update]) speaks German (42,187 or 86.1%), with Italian being second most common (2,130 or 4.3%) and Albanian being third (855 or 1.7%).

[5] As of 2008[update], the gender distribution of the population was 49.5% male and 50.5% female.

[5] The historical population is given in the following chart:[8] In the 2007 federal election the most popular party was the SVP which received 29.04% of the vote.

In the federal election, a total of 16,855 votes were cast, and the voter turnout was 51.3%.

[9] From the 2000 census[update], 21,525 or 43.9% were Roman Catholic, while 13,418 or 27.4% belonged to the Swiss Reformed Church.