Saint-Hilaire-de-Briouze (, literally Saint-Hilaire of Briouze) is a commune in the Orne department in north-western France.
The commune is made up of the following collection of villages and hamlets, Le Valdary, Les Auges,Les Mézerets, La Huverie, La Grande Bêche and Saint-Hilaire-de-Briouze.
The commune borders the area known as Suisse Normande.
Saint-Hilaire-de-Briouze along with another 65 communes is part of a 20,593 hectare, Natura 2000 conservation area, called the Haute vallée de l'Orne et affluents.
There are 4 watercourses that run through the commune, The river Rouvre plus 3 streams, Fief Benoit, Gué d'Arnettes, and the Vaux.