Auderghem, also known as Oudergem, is one of the 19 municipalities located within the Brussels-Capital Region of Belgium. It is situated in the south-eastern part of the region and serves as a gateway to the Sonian Forest.
The municipality is positioned along the Woluwe valley and shares borders with Etterbeek, Ixelles, Watermael-Boitsfort, and Woluwe-Saint-Pierre. It also borders the Flemish municipalities of Tervuren and Overijse. Like all other municipalities in Brussels, Auderghem is officially bilingual, recognizing both French and Dutch.