San Vittore is a municipality in the Moesa Region in the Swiss canton of Grisons (Graubünden).

San Vittore is situated in the lower part of the valley of the river Moesa, just over 2 km (1.2 mi) upstream of the border with the canton of Ticino, and 6 km (3.7 mi) upstream of Arbedo-Castione, where the Moesa joins the Ticino.

Of the rest of the land, 2.8% is settled (buildings or roads) and the remainder (15%) is non-productive (rivers, glaciers or mountains).

[7] The age distribution, as of 2000[update], in San Vittore is; 82 children or 12.5% of the population are between 0 and 9 years old.

[4] The historical population is given in the following table:[7][8] The Chapel of S. Lucio e dintorni and the Torre di Pala are listed as Swiss heritage sites of national significance.