Stüsslingen is a municipality in the district of Gösgen in the canton of Solothurn in Switzerland.

[5] After the 2021 merger, Stüsslingen has an area, (as of the 2004/09 survey), of 8.39 km2 (3.24 sq mi).

Of the rest of the land, 0.91 km2 (0.35 sq mi) or 14.7% is settled (buildings or roads), 0.01 km2 (2.5 acres) or 0.2% is either rivers or lakes.

while parks, green belts and sports fields made up 5.3%.

[7] The municipality is located in the Gösgen district, along a stream in the foot hills of the Rebenfluh and Gugenkette mountains.

The blazon of the municipal coat of arms is Azure three Mullets of five Or, one and two.

[11] Most of the population (as of 2000[update]) speaks German (913 or 96.6%), with Italian being second most common (6 or 0.6%) and French being third (5 or 0.5%).

[10] The age distribution, as of 2000[update], in Stüsslingen is; 61 children or 6.5% of the population are between 0 and 6 years old and 204 teenagers or 21.6% are between 7 and 19.

The greatest number of single family homes (79) were built between 1971 and 1980.

[11] The historical population is given in the following chart:[16] In the 2007 federal election the most popular party was the SVP which received 29.6% of the vote.

In the federal election, a total of 474 votes were cast, and the voter turnout was 60.5%.

[11] There were 537 residents of the municipality who were employed in some capacity, of which females made up 43.4% of the workforce.

In 2008[update] the total number of full-time equivalent jobs was 126.

In the tertiary sector; 16 or 21.6% were in wholesale or retail sales or the repair of motor vehicles, 5 or 6.8% were in the movement and storage of goods, 22 or 29.7% were in a hotel or restaurant, 1 was in the information industry, 2 or 2.7% were technical professionals or scientists, 7 or 9.5% were in education.

[11] From the 2000 census[update], 544 or 57.6% were Roman Catholic, while 234 or 24.8% belonged to the Swiss Reformed Church.