The Radnor Township is located in the administrative region of Mauricie, in the province of Quebec, in Canada. Today, the administration of this territory is under the city of Shawinigan and Mekinac Regional County Municipality (RCM). Rectangular, the Canton is about 5 km wide and 38 km deep, oriented northwest to southeast. The central part of the township is in La Mauricie National Park, on the west bank of the Saint-Maurice River which cut diagonally this township. The southeastern part of the township includes the municipalities of Saint-Jean-des-Piles, Grandes-Piles, Saint-Roch-de-Mékinac, sector Lac-à-la-Tortue and Garneau railway junction.