Tadoussac is a village municipality in La Haute-Côte-Nord RCM, on the north shore of the maritime section of the estuary of St. Lawrence river, in Côte-Nord region, Quebec, Canada.

Côte-Nord is a region of 247,655.33 square kilometres (95,620.26 sq mi), the second-largest administrative region in Québec Province, Canada, behind Nord-du-Québec. It covers much of the northern shore of the Saint Lawrence River estuary and the Gulf of Saint Lawrence past Tadoussac.