Bretzwil is a municipality in the district of Waldenburg in the canton of Basel-Country in Switzerland.

[3] Bretzwil has an area, as of 2009[update], of 7.33 square kilometers (2.83 sq mi).

Of the rest of the land, 0.35 km2 (0.14 sq mi) or 4.8% is settled (buildings or roads), 0.01 km2 (2.5 acres) or 0.1% is either rivers or lakes.

[4] The municipality is located in the Waldenburg district, at the base of the Jura Mountains.

The blazon of the municipal coat of arms is Or, two Battons fleury Gules in saltire.

[8] Most of the population (as of 2000[update]) speaks German (669 or 94.0%), with Turkish being second most common (10 or 1.4%) and Serbo-Croatian being third (6 or 0.8%).

[7] The age distribution, as of 2010[update], in Bretzwil is; 67 children or 8.5% of the population are between 0 and 6 years old and 141 teenagers or 17.9% are between 7 and 19.

The greatest number of single family homes (45) were built between 1971 and 1980.

[8] As of 2000[update] the average price to rent a four-room apartment was 1274.00 CHF (US$1020, £570, €820).

[8] The historical population is given in the following chart:[3][13] In the 2007 federal election the most popular party was the SVP which received 49.75% of the vote.

In the federal election, a total of 265 votes were cast, and the voter turnout was 47.4%.

[8] There were 366 residents of the municipality who were employed in some capacity, of which females made up 42.1% of the workforce.

In the tertiary sector; 7 or 22.6% were in wholesale or retail sales or the repair of motor vehicles, 10 or 32.3% were in a hotel or restaurant, 3 or 9.7% were in the information industry, 1 was a technical professional or scientist, 5 or 16.1% were in education and 1 was in health care.

[8] From the 2000 census[update], 90 or 12.6% were Roman Catholic, while 490 or 68.8% belonged to the Swiss Reformed Church.