The Lac du Moulin (English: Lake of the Mill) is a body of water in the watershed of the rivière du Moulin and the Saguenay River. Lac du Moulin is located in the unorganized territory of Lac-Pikauba, in the Charlevoix Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada. The Lac du Moulin is located in the northern part of the Laurentides Wildlife Reserve.