Roberval is a city on the south-western shore of Lac Saint-Jean in the Le Domaine-du-Roy Regional County Municipality of Quebec, Canada. With a population of 10,544 in the Canada 2006 Census, it is the third largest city on this lake after Alma and Dolbeau-Mistassini.It is the seat of the Domaine-du-Roy RCM and the main service centre for the region with a hospital and some government services.