Beauce-Sud is a provincial electoral district in the Chaudière-Appalaches and Estrie regions of Quebec, Canada that elects members to the National Assembly of Quebec. It notably includes the municipalities of Saint-Georges, Saint-Prosper, Saint-Côme-Linière, Saint-Martin, Saint-Éphrem-de-Beauce and Saint-Gédéon-de-Beauce. It was created along with Beauce-Nord for the 1973 election from parts of Beauce electoral district, at the same time also gaining a piece of the old Frontenac district.