The Golden Horseshoe is a secondary region of Southern Ontario, Canada, which lies at the western end of Lake Ontario, with outer boundaries stretching south to Lake Erie and north to Lake Scugog and Lake Simcoe. It includes the Greater Toronto Area and adjacent upper-tier municipalities with substantial urban agglomerations. The region is the most densely populated and industrialized in Canada. With a population of 7,826,367 people in its core and 9,245,438 in its greater area, the Golden Horseshoe accounts for over 21 percent of the population of Canada and more than 55 percent of Ontario's population. It is part of the Quebec City–Windsor Corridor, itself part of the Great Lakes Megalopolis.