Valendas is a former municipality in the district of Surselva in the canton of Graubünden in Switzerland . The municipalities of Valendas, Versam , Safien and Tenna merged on 1 January 2013 into the new municipality of Safiental .

Valendas is first mentioned in 765 as in Valendano.

Valendas had an area, as of 2006, of 22.8 km2 (8.8 sq mi). Of this area, 21.6% is used for agricultural purposes, while 48.7% is forested. Of the rest of the land, 1.8% is settled (buildings or roads) and the remainder (27.9%) is non-productive (rivers, glaciers or mountains).