Grimbosq () is a commune in the Calvados department in the Normandy region in northwestern France.
The commune is part of the area known as Suisse Normande.
The commune is made up of the following collection of villages and hamlets, Le Vieux Grimbosq, and Grimbosq.
The river Orne plus six streams The Coupe-Gorge, la Petite Vallee, La Planquette, The Flagy, La Vallee Fermante and La Grande Vallee are the four watercourses running through the commune.