Province in central Canada, bordered by Hudson Bay and James Bay to the north; Quebec to the east; the St. Lawrence River, Lake Ontario, Lake Erie, Lake Huron, Lake Superior, and Minnesota to the south; and Manitoba to the west. Its capital and largest city is Toronto.
Note: The Canadian side of Niagara Falls is in southern Ontario.
Note: Ottawa, Canada's capital, is in southeastern Ontario.
Note: Ontario is the most heavily industrialized, populous, and prosperous province in Canada.