Saint-Joseph-de-Beauce is a city in the Municipalité régionale de comté Beauce-Centre in Quebec, Canada. It is part of the Chaudière-Appalaches region and the population was 5,014 as of the Canada 2021 Census. The new city constitution dates from 1999, when the city of Saint-Joseph-de-Beauce and the parish municipality of Saint-Joseph-de-Beauce amalgamated.