Bellechasse Regional County Municipality is a regional county municipality in the Chaudière-Appalaches region of Quebec. The county seat is Saint-Lazare-de-Bellechasse. Saint-Lazare was chosen as the county seat because of its central location. Other municipalities, such as Saint-Anselme, Sainte-Claire, and Saint-Damien had wanted to be the county seat because of their larger population. The region belongs to the Lévis—Bellechasse federal electoral district.