According to the 2011 Census, there were 252,960 Canadians who claimed Greek ancestry, of which 140,965 reside in Ontario and 96,425 in the Greater Toronto Area.
Primary areas of settlement in the GTA: Scarborough Southwest, Don Valley East, Toronto-Danforth, Scarborough-Rouge River, Whitechurch-Stoufville, Richmond Hill, Markham, Vaughan, Aurora, King, East Gwillimbury, Uxbridge, Southern part of Pickering, Ajax, Milton.
The Canadian Encyclopedia: http://www.thecanadianencyclopedia.ca/en/article/greeks/
The Encyclopedia of Canada’s Peoples: http://multiculturalcanada.ca/Encyclopedia/A-Z/g3
Canadian Immigrant http://canadianimmigrant.ca/community/the-greek-life-in-canada