Valdallière is a commune. It is found in the region Normandy in the Calvados department in the northwest of France. The municipality was created on 1 January 2016 and consists of the 14 former communes of Vassy (the seat), Bernières-le-Patry, Burcy, Chênedollé, Le Désert, Estry, Montchamp, Pierres, Presles, La Rocque, Rully, Saint-Charles-de-Percy, Le Theil-Bocage and Viessoix.