Montignies-sur-Roc is a village in the municipality Honnelles, in the Belgian province of Hainaut. The village is located amidst the "Parc naturel des Hauts-Pays". The village is located near the French border, along the river la Petite Honnelle. The village is home to the Brasserie de l'Abbaye des Rocs, a brewery where Abbaye des Rocs, Blanche de Honnelles, Montagnards and Altitude 6 are brewed.