Holderbank is a municipality in the district of Thal in the canton of Solothurn in Switzerland.

[3] Holderbank has an area, as of 2009[update], of 7.76 square kilometers (3.00 sq mi).

Of the rest of the land, 0.48 km2 (0.19 sq mi) or 6.2% is settled (buildings or roads), 0.03 km2 (7.4 acres) or 0.4% is either rivers or lakes.

[4] The municipality is located in the Thal district, in a longitudinal valley between the first and second Jura mountain chains near the Oberer Hauenstein Pass.

The blazon of the municipal coat of arms is Tierced in bend Gules Argent and Sable, in the second a Letter H of the first.

[8] Most of the population (as of 2000[update]) speaks German (561 or 95.2%), with Serbo-Croatian being second most common (13 or 2.2%) and English being third (7 or 1.2%).

[7] The age distribution, as of 2000[update], in Holderbank is; 43 children or 7.3% of the population are between 0 and 6 years old and 100 teenagers or 17.0% are between 7 and 19.

The greatest number of single family homes (35) were built between 1946 and 1960.

[8] The historical population is given in the following chart:[3][13] The Ruin of Alt-Bechburg Castle is listed as a Swiss heritage site of national significance.

[14] In the 2007 federal election the most popular party was the CVP which received 32.88% of the vote.

In the federal election, a total of 260 votes were cast, and the voter turnout was 53.5%.

[8] There were 305 residents of the municipality who were employed in some capacity, of which females made up 41.3% of the workforce.

The number of jobs in the primary sector was 25, of which 23 were in agriculture and 2 were in forestry or lumber production.

In the tertiary sector; 5 or 10.9% were in wholesale or retail sales or the repair of motor vehicles, 3 or 6.5% were in the movement and storage of goods, 29 or 63.0% were in a hotel or restaurant, 1 was the insurance or financial industry, 1 was a technical professional or scientist, 5 or 10.9% were in education.

[8] From the 2000 census[update], 318 or 54.0% were Roman Catholic, while 162 or 27.5% belonged to the Swiss Reformed Church.