Tamins (Romansh: Tumein) is a village and a municipality in the Imboden Region in the Swiss canton of Grisons.

Tamins is first mentioned in 1224 as Tuminne. In 1225 it was mentioned as Tvminnis and in 1399 as Tumins.

Tamins has an area, as of 2006, of 40.7 km2 (15.7 sq mi). Of this area, 16.5% is used for agricultural purposes, while 50.1% is forested. Of the rest of the land, 1.4% is settled (buildings or roads) and the remainder (32%) is non-productive (rivers, glaciers or mountains).