Hägendorf is a municipality in the district of Olten in the canton of Solothurn in Switzerland.

[3] Hägendorf has an area, as of 2009[update], of 13.94 square kilometers (5.38 sq mi).

[4] The municipality is located in the Olten district, along a stream at the southern foot of the Jura Mountains.

The blazon of the municipal coat of arms is Per bend serrated Argent and Sable.

[8] Most of the population (as of 2000[update]) speaks German (3,801 or 91.0%), with Italian being second most common (96 or 2.3%) and Albanian being third (90 or 2.2%).

[7] The age distribution, as of 2000[update], in Hägendorf is; 308 children or 7.4% of the population are between 0 and 6 years old and 676 teenagers or 16.2% are between 7 and 19.

[8] The historical population is given in the following chart:[3][13] In the 2007 federal election the most popular party was the SVP which received 34.62% of the vote.

In the federal election, a total of 1,548 votes were cast, and the voter turnout was 52.1%.

[8] There were 2,229 residents of the municipality who were employed in some capacity, of which females made up 45.6% of the workforce.

The number of jobs in the primary sector was 26, of which 25 were in agriculture and 1 was in forestry or lumber production.

In the tertiary sector; 703 or 45.2% were in wholesale or retail sales or the repair of motor vehicles, 257 or 16.5% were in the movement and storage of goods, 36 or 2.3% were in a hotel or restaurant, 46 or 3.0% were in the information industry, 16 or 1.0% were the insurance or financial industry, 71 or 4.6% were technical professionals or scientists, 52 or 3.3% were in education and 308 or 19.8% were in health care.

[8] From the 2000 census[update], 2,194 or 52.5% were Roman Catholic, while 1,122 or 26.9% belonged to the Swiss Reformed Church.

The education system in the Canton of Solothurn allows young children to attend two years of non-obligatory Kindergarten.

All the lower secondary students from Hägendorf attend their school in a neighboring municipality.

The library has (as of 2008[update]) 4,628 books or other media, and loaned out 4,229 items in the same year.

It was open a total of 126 days with average of 6 hours per week during that year.