La Nouvelle-Beauce is a regional county municipality in the Chaudière-Appalaches region in southeastern Quebec, Canada, south of the Saint Lawrence River. It is located south of Lévis, along the Chaudière River.

The Chaudière River is a 185-kilometre-long (115 mi) river with its source near the Town of Lac-Mégantic, in southeast Quebec, Canada. From its source Lake Mégantic in the Estrie region, it runs northwards to flow into the St. Lawrence River opposite Quebec City.