Mã bưu chính Ontario
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67Ajax 3Algoma 1Ancaster 2Barrie 2Belleville 3Bowmanville 2Brampton 9Brant 5Burlington 7Cambridge 7Chatham 2Cornwall 3Don Mills 2Downsview 2Dufferin County 1East York 4Etobicoke 11Frontenac County 1Gloucester 6Greater Sudbury 9Guelph 6Halton 2Hamilton 17Kanata 6Kingston 4Kitchener 11La Salle 2Lake Simcoe 3Lake Superior 2London 17Markham 7Mississauga 23Nepean 5Newmarket 2Niagara Falls 4Nipissing 3North Bay 3North York 14Oakville 5Orangeville 2Oshawa 5Ottawa 17Parry Sound 3Pembroke 2Peterborough 4Peterborough County 1Pickering 4Renfrew County 1Richmond Hill 4Sarnia 5Sault Ste. 3Scarborough 17St. Catharines 8St. Thomas 2Tecumseh 2Thunder Bay 7Timiskaming 2Timmins 3Toronto 41Waterloo 4Welland 2Whitby 4Willowdale 3Windsor 12Woodbridge 2Woodstock 3York 4