Soazza is a municipality in the Moesa Region in the Swiss canton of the Grisons .

Soazza is first mentioned in 1203 as Soaza.

Soazza has an area, as of 2006, of 46.4 km2 (17.9 sq mi). Of this area, 7.2% is used for agricultural purposes, while 53.7% is forested. Of the rest of the land, 1.5% is settled (buildings or roads) and the remainder (37.7%) is non-productive (rivers, glaciers or mountains).

Soazza has a population (as of 31 December 2020) of 324.