Oberbuchsiten is a municipality in the district of Gäu in the canton of Solothurn in Switzerland.

[3] Oberbuchsiten has an area, as of 2009[update], of 9.4 square kilometers (3.6 sq mi).

[4] The municipality is located in the Gäu district, on the alluvial fan of the Mülibach at the foot of the Jura Mountains.

The blazon of the municipal coat of arms is Or a Box Tree Vert issuant from a Mount of 3 Coupeaux of the same.

[8] Most of the population (as of 2000[update]) speaks German (1,564 or 85.0%), with Albanian being second most common (79 or 4.3%) and Italian being third (41 or 2.2%).

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

[7] The age distribution, as of 2000[update], in Oberbuchsiten is; 181 children or 9.8% of the population are between 0 and 6 years old and 304 teenagers or 16.5% are between 7 and 19.

[8] The historical population is given in the following chart:[3][13] The entire village of Oberbuchsiten is part of the Inventory of Swiss Heritage Sites.

[14] In the 2007 federal election the most popular party was the CVP which received 33.2% of the vote.

In the federal election, a total of 618 votes were cast, and the voter turnout was 51.4%.

[8] There were 985 residents of the municipality who were employed in some capacity, of which females made up 43.9% of the workforce.

The number of jobs in the primary sector was 18, of which 11 were in agriculture and 7 were in forestry or lumber production.

In the tertiary sector; 100 or 31.8% were in wholesale or retail sales or the repair of motor vehicles, 41 or 13.1% were in the movement and storage of goods, 26 or 8.3% were in a hotel or restaurant, 1 was in the information industry, 4 or 1.3% were the insurance or financial industry, 46 or 14.6% were technical professionals or scientists, 11 or 3.5% were in education and 25 or 8.0% were in health care.

[8] From the 2000 census[update], 1,009 or 54.8% were Roman Catholic, while 386 or 21.0% 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 Oberbuchsiten attend their school in a neighboring municipality.