Arvigo is a former municipality in the district of Moesa in the south of the Swiss canton of Graubünden, next to Ticino . On 1 January 2015 the former municipalities of Arvigo, Braggio , Cauco and Selma merged to form the new municipality of Calanca .

Arvigo is first mentioned in 1453 as Arvicho.

Before the merger, Arvigo had a total area of 17.0 km2 (6.6 sq mi). Of this area, 11.9% is used for agricultural purposes, while 53.4% is forested. Of the rest of the land, 1.5% is settled (buildings or roads) and the remainder (33.1%) is non-productive (rivers, glaciers or mountains).