Greater Toronto Area
The Greater Toronto Area (GTA) is the metropolitan area that includes Toronto and the surrounding cities such as Mississauga, Brampton, Markham and Vaughan. It is the most populous metropolitan area in Canada.
Greater Toronto Area Media
A map of Toronto's Census Metropolitan Area, which contains a large portion of the GTA
Toronto is the central city of the Greater Toronto Area.
Mississauga is the largest city in Peel Region, and the second-largest city in the Greater Toronto Area.
Brampton, also in Peel Region, is the third largest city in the Greater Toronto Area.
Markham is the largest city in York Region, and the fourth largest city in the Greater Toronto Area.
By the 17th century, the area was a crucial point for travel, with the Humber and Rouge River providing a shortcut to Lake Simcoe and the upper Great Lakes. These routes were known as the Toronto Passage.
Although the original boundaries of York County encompassed nearly all of the GTA, by 1851, its boundaries had been reduced to the present-day City of Toronto and York Region as depicted on the 1871 map.
Satellite image of Toronto and Mississauga during the mid-1980s
Detailed map of the Greater Toronto Area in 2022
Rouge National Urban Park is an urban national park in the GTA. It includes parts of the municipalities of Markham, Pickering, Toronto, and Uxbridge.
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