Tergast is a village in the region of East Frisia, in Lower Saxony, Germany.

The first known mention of the village is as Gast in a deed of gift from the Langen monastery in 1401.

Its current name could refer to the fact that the village is built on a high sand ridge, known as a geest.

The Church of Tergast was built on the highest point of this ridge somewhere in the second half of the 13th century.

[1] The Emden municipal waterworks with several reservoirs is located in Tergast.