Viamala Region is one of the eleven regions of the canton of Graubünden in Switzerland. It has an area of and a population of (as of ). It was created on 1 January 2017 as part of a reorganization of the Canton.Swiss Federal Statistical Office - Amtliches Gemeindeverzeichnis der Schweiz - Mutationsmeldungen 2016 accessed 16 February 2017
+ Municipalities in the Viamala Region Municipality Population () Area (km2) Fürstenau Rothenbrunnen Scharans Sils im Domleschg Cazis Flerden Masein Thusis Tschappina Urmein Domleschg Avers Rheinwald Sufers Andeer Muntogna da Schons Rongellen Zillis-Reischen Ferrera
Mergers On 1 January 2018, the former municipality of Mutten merged into the municipality of Thusis. On 1 January 2019, the former municipalities of Hinterrhein, Nufenen and Splügen merged into the new municipality of Rheinwald. On 1 January 2021, the former municipalities of Casti-Wergenstein, Donat, Lohn and Mathon merged to form the new municipality of Muntogna da Schons.
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