Hefenhofen is a municipality in the district of Arbon in the canton of Thurgau in Switzerland.

[3] Hefenhofen was a fief of the Abbey of Saint Gall and until the 17th century it was part of the Bailiwick of Hagenwil.

In 1600, the low court of Hefenhofen was formed, which included Auenhofen, Hatswil, Moos and Tonhub.

In the 19th century the major economic activities included fruit production and weaving.

The only heavy industry in Hefenhofen until 1950, was the Stutz construction business founded in 1877 (in 2003 it had approximately 260 employees) and the Hatswil mill.

Opened in 1975, the municipal solid waste incinerator of the Oberthurgau region, closed their doors in 1996.

[3] Hefenhofen has an area, as of 2009[update], of 6.05 square kilometers (2.34 sq mi).

Of the rest of the land, 0.76 km2 (0.29 sq mi) or 12.6% is settled (buildings or roads).

Most of the population (as of 2000[update]) speaks German (96.6%), with Italian being second most common (0.9%) and French being third (0.5%).

[6] The age distribution, as of 2009[update], in Hefenhofen is; 117 children or 10.1% of the population are between 0 and 9 years old and 202 teenagers or 17.5% are between 10 and 19.

[12] In the 2007 federal election the most popular party was the SVP which received 43.55% of the vote.

In the federal election, a total of 323 votes were cast, and the voter turnout was 39.0%.

[13] The historical population is given in the following table:[3] As of  2007[update], Hefenhofen had an unemployment rate of 1.66%.

[7] From the 2000 census[update], 382 or 34.5% were Roman Catholic, while 507 or 45.8% belonged to the Swiss Reformed Church.