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

Walterswil has an area, as of 2009[update], of 4.48 square kilometers (1.73 sq mi).

[3] The blazon of the municipal coat of arms is Per fess Gules and Argent a Bend counterchanged and in the second a Juniper Branch proper.

[7] Most of the population (as of 2000[update]) speaks German (621 or 98.3%), with French being second most common (2 or 0.3%) and English being third (2 or 0.3%).

[8] As of 2008[update], the gender distribution of the population was 51.9% male and 48.1% female.

[6] The age distribution, as of 2000[update], in Walterswil is; 54 children or 8.5% of the population are between 0 and 6 years old and 106 teenagers or 16.8% are between 7 and 19.

[7] The historical population is given in the following chart:[12] In the 2007 federal election the most popular party was the SVP which received 36.98% of the vote.

In the federal election, a total of 229 votes were cast, and the voter turnout was 41.4%.

[7] There were 335 residents of the municipality who were employed in some capacity, of which females made up 41.8% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 82.

In the tertiary sector; 38 or 74.5% were in wholesale or retail sales or the repair of motor vehicles, 10 or 19.6% were in a hotel or restaurant, 2 or 3.9% were technical professionals or scientists, .

[7] From the 2000 census[update], 241 or 38.1% were Roman Catholic, while 262 or 41.5% belonged to the Swiss Reformed Church.

[8] As of 2000[update], there were 56 students from Walterswil who attended schools outside the municipality.