Coulmer 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 Chêne, Le Pommeret, La Faudinière, Les Portes and Coulmer.

[3] The Commune is one of 30 communes that make up the Natura 2000 protected area of Bocages et vergers du sud Pays d'Auge.

[4] The commune has two rivers flowing through its borders, The Touques and the Maure.

In addition it has 5 streams running through it, La Noe, the Bouillant, the Bouillonnay, the Launay and the Menil.