Thayngen (German pronunciation: [ˈtaːɪŋən]) is a village and a municipality in the canton of Schaffhausen in Switzerland.

On 1 January 2009 Altdorf, Bibern, Hofen and Opfertshofen merged into Thayngen.

Of the rest of the land, 17.1% is settled (buildings or roads) and the remainder (1.8%) is non-productive (rivers or lakes).

The blazon of the municipal coat of arms is Per pale Sable a key Argent and Vert a Sickle of the second and in chief a Cross couped.

Of the foreign population, (as of 2008[update]), 47.4% are from Germany, 15.2% are from Italy, 5.5% are from Croatia, 10.2% are from Serbia, 4.1% are from Macedonia, 4.7% are from Turkey, and 12.9% are from another country.

The prehistoric sites are the Kesslerloch which was a paleolithic cave and the Weier, a neolithic river bank settlement.

[7] The settlements Weier I-III are part of the Prehistoric Pile dwellings around the Alps a UNESCO World Heritage Site.