Domat/Ems (Romansh: Domat [ˈdomɐt] ; German: Ems) is a municipality in the Imboden Region in the Swiss canton of the Grisons .

Domat/Ems is first mentioned in 765 as colonia de Amede. Ems is the German name for the municipality, Domat is the Romansh name and since 1943 the official name has been the combination of both.

Domat/Ems has an area, as of 2006, of 24.2 km2 (9.3 sq mi). Of this area, 27.7% is used for agricultural purposes, while 53.8% is forested. Of the rest of the land, 12.2% is settled (buildings or roads) and the remainder (6.4%) is non-productive (rivers, glaciers or mountains).