Les Monts d'Andaine (French pronunciation: [le mɔ̃ dɑ̃dɛn]) is a commune in the department of Orne, northwestern France.

The municipality was established on 1 January 2016 by merger of the former communes of Saint-Maurice-du-Désert and La Sauvagère (the seat).

[3] The commune is made up of the following collection of villages and hamlets, La Serrière, L'Hermangère, Le Domaine, Le Mont Oiselet, La Bêlère, Les Landes and Les Monts-d'Andaine.

[5] Les Monts d'Andaine along with the communes of Perrou, Juvigny Val d'Andaine, Domfront en Poiraie, Dompierre and Champsecret shares part of the Bassin de l'Andainette a Natura 2000 conservation site.

[6] The site measures 617 hectares and is home to creatures such as the Bullhead, Brook lamprey and white-clawed crayfish.