Soumagne is a municipality in Wallonia, the French-speaking region of southern Belgium. It is located in the province of Liège, in the eastern part of the country.
As a municipality, Soumagne is one of the local administrative units that make up the Belgian system of government, grouping together the area's constituent settlements under a single local authority. It lies within the province of Liège, whose capital is the city of Liège.
Soumagne sits in the Walloon region, the southern half of Belgium, which is predominantly French-speaking and distinct from the Dutch-speaking region of Flanders to the north and the bilingual Brussels-Capital Region.