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 originally chosen as the county seat because of its central location. Other municipalities, such as Saint-Anselme, Sainte-Claire, Saint-Damien originally wanted to be the county seat because of their larger population. The region belongs to the Lévis—Bellechasse federal electoral district.