Tartar is a former municipality in the district of Hinterrhein in the Swiss canton of Graubünden.

Of the rest of the land, 8.2% is settled (buildings or roads) and the remainder (1.9%) is non-productive (rivers, glaciers or mountains).

Tartar is located on the lower Heinzenberg mountains at an elevation of 994 m (3,261 ft).

It consists of the haufendorf (an irregular, unplanned and quite closely packed village, built around a central square) village of Tartar made up of the sections of Oberschauenberg, Valeina, Pro Biet and the farm house group of Foppa.

[5] In the 2007 federal election the most popular party was the SVP which received 53.4% of the vote.