Sumvitg (Romansh pronunciation: [ˈsumvitɕ] ⓘ; German: Somvix) is a municipality in the Surselva Region in the canton of Graubünden in Switzerland.

Of the rest of the land, 1.3% is settled (buildings or roads) and the remainder (47.1%) is non-productive (rivers, glaciers or mountains).

It consists of the village of Sumvitg and the hamlets of Surrein, Rabius, Laus and Compadials as well as numerous farm houses.

[8] In the 2007 federal election the most popular party was the CVP which received 71.6% of the vote.

[4] From the 2000 census[update], 1,199 or 91.3% are Roman Catholic, while 35 or 2.7% belonged to the Swiss Reformed Church.

[8] The historical population is given in the following table:[3] The Punt Russein bridge (shared with Disentis/Mustér) is listed as a Swiss heritage site of national significance.