The Municipality of Cascapedia-Saint-Jules is situated in the administrative region of Gaspésie-Îles-de-la-Madeleine. It is within the MRC of Bonaventure on the southern shores of the peninsula. The municipality covers 106.44 squared kilometres of territory.The territory is bordered in the north by the Gaspésie National Park, in the south-east by New Richmond, and the south-west by Maria.

One can access the municipality by Route 299 which crosses the Peninsula from south to north, starting in New Richmond, passing through Cascapedia-Saint-Jules, reaching the park, and finishing in St. Anne des Monts on the north side. Route 132 is the main highway on both sides of the peninsula.

There are two sites of natural beauty present in Cascapedia-Saint-Jules. The first is a majestic view of the Chic-Choc Mountains. The second, which crosses the town from one side to the other, is the Cascapedia River, known worldwide for its Atlantic salmon. An important feature of Cascapédia-St-Jules: It is almost surrounded by water, in fact, bordering the Bay of Chaleur to the south, Cascapedia River in the center and the Anger River to the north. There are also many lakes and streams.