Viamala Region is one of the eleven regions of the canton of Graubünden in Switzerland. It has an area of 627.58 square kilometers (242.31 sq mi) and a population of 13,908 (as of 31 December 2020). It was created on 1 January 2017 as part of a reorganization of the Canton.
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.