Grainville-sur-Odon (, literally Grainville on Odon) is a commune in the Calvados department in the Normandy region in northwestern France.
Geography
The commune is made up of the following collection of villages and hamlets, Belleval, Grainville-sur-Odon, Le Valtru and Cayer.
The river Odon flows through the commune. In addition a stream the Ruisseau de Sabley traverses the commune.