The Central region of Ontario consists of the economic regions of Muskoka-Kawarthas, Kitchener-Waterloo-Barrie and Hamilton-Niagara Peninsula as defined by Statistics Canada, which includes the Census Metropolitan Areas (CMAs) of St. Catharines-Niagara, Hamilton and Kitchener-Waterloo. The region includes such cities as Peterborough, Orangeville, Guelph, Barrie and Brantford.
The Eastern region consists of the economic regions of both Ottawa and Kingston-Pembroke, including the CMAs of Ottawa and Kingston. Cities include Cornwall, Brockville, Belleville and Petawawa.
Greater Toronto Area
The GTA refers to the economic region of Toronto as defined by Statistics Canada. It includes the municipalities of Ajax, Aurora, Bradford West Gwillimbury, Brampton, Brock, Caledon, Clarington, East Gwillimbury, Georgina, Georgina Island, Halton Hills, King, Markham, Milton, Mississauga, Newmarket, Oakville, Oshawa, Pickering, Richmond Hill, Scugog, Toronto, Uxbridge, Vaughan, Whitby and Whitchurch-Stouffville.
The Northern region includes the economic regions of the Northeast and Northwest as defined by Statistics Canada, including the CMAs of Thunder Bay and Sudbury. Cities include Sault Ste. Marie, Timmins, Kirkland Lake, Dryden, Kenora and Fort Frances.
The Southwest region includes the economic regions of London, Windsor-Sarnia and Stratford-Bruce Peninsula as defined by Statistics Canada, including the CMAs of London and Windsor. Cities include Chatham, Ingersoll, Sarnia, Stratford, Goderich and Owen Sound.