High Quality Content by WIKIPEDIA articles! Ontario is located in East/Central Canada, bordered by the Great Lakes, Hudson Bay and James Bay. It is Canada's second largest province in total land area. The largest border is with the Canadian province of Manitoba to the west for approximately 1,025 km (637 mi) along longitude 95? 50’ W to latitude 53? N then a line to Hudson Bay, then the province of Quebec to the east, mostly along longitude 79 30’ W (for about 430 km) and the Ottawa River from Lake Timiskaming (for about 620 km), Ontario also shares borders with the US states of Minnesota to the west for 685 km (426 mi) across Pigeon River, Lakes Saganaga, Basswood, Lac la Croix, Rainy Lake, Rainy River and Lake of the Woods, New York for 309 km (192 mi) along Lake Ontario, the St. Lawrence and Niagara rivers, and Michigan to the south-west for 1,160 km (720 mi) largely across Lakes St. Clair, Huron and Superior. It is also located north of Ohio and Erie, Pennsylvania across Lake Erie.