Bettwiesen is a municipality in the district of Münchwilen in the canton of Thurgau in Switzerland.

[3] During the Middle Ages it belonged to the Prince-Bishop of Constance's Tannegg district.

The monastery had, since the Late Middle Ages, owned land in Bettwiesen and had built a castle in 1627.

St. Mary's Chapel in Bettwiesen was first mentioned in 1275 and was part of the parish of Wil under the monastery.

[3] Farmland and vineyards were replaced in 1900 by the livestock industry (1870 a cattle bank opened and in 1889 a dairy).

[3] Bettwiesen has an area, as of 2009[update], of 3.85 square kilometers (1.49 sq mi).

Of the rest of the land, 0.53 km2 (0.20 sq mi) or 13.8% is settled (buildings or roads), 0.01 km2 (2.5 acres) or 0.3% is either rivers or lakes.

Most of the population (as of 2000[update]) speaks German(85.9%), with Italian being second most common ( 4.5%) and Albanian being third ( 4.1%).

[6] The age distribution, as of 2009[update], in Bettwiesen is; 90 children or 8.5% of the population are between 0 and 9 years old and 155 teenagers or 14.7% are between 10 and 19.

[12] In the 2007 federal election the most popular party was the SVP which received 48.38% of the vote.

In the federal election, a total of 332 votes were cast, and the voter turnout was 49.9%.

[13] The historical population is given in the following table:[3][14] Bettwiesen Castle is listed as a Swiss heritage site of national significance.

[7] From the 2000 census[update], 567 or 55.8% were Roman Catholic, while 227 or 22.3% belonged to the Swiss Reformed Church.

Of the children in kindergarten, 10 or 45.5% were female, 4 or 18.2% were not Swiss citizens and 4 or 18.2% did not speak German natively.

At the lower primary level, there were 14 children or 41.2% of the total population who were female, 7 or 20.6% were not Swiss citizens and 7 or 20.6% did not speak German natively.

In the upper primary level, there were 18 or 41.9% who were female, 9 or 20.9% were not Swiss citizens and 6 or 14.0% did not speak German natively.