Boulon () is a commune in the Calvados department in the Normandy region in northwestern France.
The commune is made up of the following collection of villages and hamlets, Le Hutray, Gable-Blanc and Boulon.
Two watercourses, Le Tourtous and the Ruisseau du Val Distrait flows through the commune.
The commune borders the area known as Suisse Normande.
Boulon along with Fresney-le-Puceux & Saint-Laurent-de-Condel is twinned with: