Sagogn (Romansh pronunciation: [sɐˈɡɔɲ] ; German: Sagens) is a municipality in the Surselva Region in the canton of the Grisons in Switzerland .

Sagogn is first mentioned in 765 as Secanio.

Sagogn has an area, as of 2006, of 7 km2 (2.7 sq mi). Of this area, 23.2% is used for agricultural purposes, while 59.7% is forested. Of the rest of the land, 4.7% is settled (buildings or roads) and the remainder (12.4%) is non-productive (rivers, glaciers or mountains).

Before 2017, the municipality was located in the Ilanz sub-district of the Surselva district, after 2017 it was part of the Surselva Region.