Montérégie is a vast and diverse region of nearly 10,000 square kilometres located between the St. Lawrence River to the north, the Outaouais region to the west, the Vallée-du-Richelieu to the east and the United States border and Estrie region to the south.
It is a diverse territory because of the many kinds of occupations found here, be they in the residential, agricultural or industrial spheres. While the urban area extends mainly along the St. Lawrence River and is more densely populated, most of the region consists of rural areas. Montérégie has 11 local service networks, 179 municipalities, 14 regional county municipalities, three regional conferences of elected officials and two First Nations reserves, Akwesasne and Kahnawake.
Montérégie is the second-most-populous health region in Québec, after that of Montréal. In 2013, it amounted to 1,487,272 people, 296,164 of whom were under the age of 18, which represents 19.9% of the total population and 19.5% of Québec’s youth.