Auderghem (former Dutch spelling, now used in French; pronounced [odəʁˈɡem]) or Oudergem (Dutch: [ˈʌudərɣɛm]) is one of the nineteen municipalities located in the Brussels-Capital Region of Belgium.

Located to the southeast of the capital, along the Woluwe valley and at the entrance to the Sonian Forest (Forêt de Soignes, Zoniënwoud), the municipality has an environmental advantage. Despite large roads slicing through and the increasing traffic, it has been able to preserve a relatively important part of its natural and historic legacy: the creeks, the Abbey of Rouge-Cloître or Rood Klooster (Red Cloister) and its art center, the Priory of Val Duchesse or Hertoginnedal (Duchess Dale), the Château of Trois Fontaines or Drie Fonteinen (Three Fountains), and the remarkable Chapel of Saint Anne.