Outaouais is a region of western Quebec, Canada. It includes the city of Gatineau, the municipality of Val-des-Monts, the municipality of Cantl…Outaouais is a region of western Quebec, Canada. It includes the city of Gatineau, the municipality of Val-des-Monts, the municipality of Cantley and the Papineau region. Geographically, it is located on the north side of the Ottawa River opposite Canada's capital, Ottawa. It has a land area of 30,457.52 square kilometres and its population was 405,158 inhabitants as of 2021.