Büsserach is a municipality in the district of Thierstein in the canton of Solothurn in Switzerland.

[3] Büsserach has an area, as of 2009[update], of 7.55 square kilometers (2.92 sq mi).

[4] The municipality is located in the Thierstein district, on the eastern slope of the valley that runs to the Passwang Pass.

The blazon of the municipal coat of arms is Gules the Castle "Thierstein" Or issuant from Coupeaux Vert.

[8] Most of the population (as of 2000[update]) speaks German (1,720 or 92.2%), with Serbo-Croatian being second most common (36 or 1.9%) and Albanian being third (30 or 1.6%).

[9] As of 2008[update], the gender distribution of the population was 51.2% male and 48.8% female.

[7] The age distribution, as of 2000[update], in Büsserach is; 171 children or 9.2% of the population are between 0 and 6 years old and 275 teenagers or 14.7% 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 FDP which received 36.1% of the vote.

In the federal election, a total of 632 votes were cast, and the voter turnout was 46.6%.

[8] There were 985 residents of the municipality who were employed in some capacity, of which females made up 39.7% of the workforce.

The number of jobs in the primary sector was 17, of which 14 were in agriculture and 3 were in forestry or lumber production.

The number of jobs in the secondary sector was 267 of which 178 or (66.7%) were in manufacturing and 90 (33.7%) were in construction.

In the tertiary sector; 63 or 36.6% were in wholesale or retail sales or the repair of motor vehicles, 19 or 11.0% were in the movement and storage of goods, 22 or 12.8% were in a hotel or restaurant, 1 was in the information industry, 2 or 1.2% were the insurance or financial industry, 8 or 4.7% were technical professionals or scientists, 19 or 11.0% were in education and 1 was in health care.

[8] From the 2000 census[update], 1,423 or 76.3% were Roman Catholic, while 198 or 10.6% 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 Büsserach attend their school in a neighboring municipality.