St. Martin is a village and was a municipality in the district of Surselva in the Swiss canton of Graubünden. On 1 January 2015 the former municipality of St. Martin merged into the municipality of Vals.

Surselva Region is one of the eleven administrative districts in the canton of Graubünden in Switzerland. It was created on 1 January 2017 as part of a reorganization of the canton.