Thundorf (pronounced [ˈtuːndɔrf], in the local dialect [ˈtuəndɔrfː] or [ˈtuəndərəfː])[3] is a municipality in the district of Frauenfeld in the canton of Thurgau in Switzerland.

In 1995, the communal territory was enlarged to the east, when Wetzikon and Lustdorf, the latter of which until then was autonomous, were joined to it.

The earliest mention of Thundorf dates back to the year 888 (Tuomsdorof/*tuomesdorf).

This place name is composed by the OHG anthroponym Duomo/*Tuomo and the noun substantive dorf ‚hamlet, farm, village, estate, quarter of a town‘.

Transport to the village is provided by a daily bus service that operates between Frauenfeld and Weinfeld.

The town is famous locally for its annual "Banae Tanz" festival which has been celebrated since shortly after the 1798 French Invasion[4] and establishment of the helvetischen Republic of Loskauf and is held annually on September 9.

Most of the population (as of 2000[update]) speaks German (98.2%), with Spanish being second most common ( 0.4%) and Romansh being third ( 0.3%).

[8] The age distribution, as of 2009[update], in Thundorf is; 145 children or 11.2% of the population are between 0 and 9 years old and 189 teenagers or 14.6% are between 10 and 19.

[14] In the 2007 federal election the most popular party was the SVP which received 47.08% of the vote.

In the federal election, a total of 468 votes were cast, and the voter turnout was 51.1%.

[15] The historical population is given in the following table:[16] The entire village of Lustdorf is designated as part of the Inventory of Swiss Heritage Sites.

[9] From the 2000 census[update], 250 or 21.0% were Roman Catholic, while 775 or 65.1% belonged to the Swiss Reformed Church.

The wettest month is June during which time Thundorf receives an average of 114 mm (4.5 in) of rain or snow.

The driest month of the year is March with an average of 62 mm (2.4 in) of precipitation over 12.1 days.