The
Quebec City–Windsor Corridor is the most densely populated and heavily industrialized region of
Canada. As its name suggests, the region extends between
Quebec City in the northeast and
Windsor, Ontario in the southwest, spanning . With more than 18 million people, it contains over half of the country's population and three of Canada's four
largest metropolitan areas according to the
2011 Census. In its relative importance to the Canada's economic and political infrastructure, it has many similarities to the
Northeast megalopolis in the
United States. The name was first popularized by
Via Rail, which runs frequent passenger rail service in the Quebec City–Windsor Corridor on its route named "
The Corridor".