The Priory of Le Plessis-Grimoult (French: Prieuré du Plessis-Grimoult) is a former Augustinian monastery established in the 12th century in Le Plessis-Grimoult in the department of Calvados, Normandy, France. The ruins were listed as a monument historique (national heritage site) in 1928, and the nearby archaeological site and the remains of the fortified garden in 1996.