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 1,150 kilometres (710 mi). 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 2006 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.