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 9,840 in the Canada 2021 Census, it is the fourth largest city on this lake after Alma, Dolbeau-Mistassini and Saint-Félicien. 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. It is also the seat of the judicial district of Roberval.