Les Monts d'Aunay (; 'The Mounts of Aunay') is a commune in the department of Calvados, northwestern France. It was established on 1 January 2017 by merger of the former communes of Aunay-sur-Odon (the seat), Bauquay, Campandré-Valcongrain, Danvou-la-Ferrière, Ondefontaine, Le Plessis-Grimoult and Roucamps.
The commune is made up of the following collection of villages and hamlets, Bauquay, Le Pied du Bois, Les Monts d'Aunay, Ondefontaine, Roucamps, Campandré-Valcongrain, Le Plessis-Grimoult and Danvou-la-Ferrière.
The Commune along with another nine communes shares part of a 5,729 hectare, Natura 2000 conservation area, called the Bassin de la Druance.
The commune is the source of both the River Druance and River Odon. In addition to the two rivers, nine streams run through the commune, the Ruisseau d'Herbion, Ruisseau de la Chaine, Ruisseau des Parcs, Ruisseau des Vaux, Ruisseau de Cresme, Ruisseau de Vory, Ruisseau du Val Boquet, Ruisseau de Vory and the Ruisseau de Buharet.
The commune is on the border of the area known as Suisse Normande.
Population data refer to the commune in its geography as of January 2025.
Les Monts d'Aunay is twinned with: