Ontario one in every of the thirteen provinces and territories of North American country, is found in eastern North American country. It Canada's most inhabited province by an oversized margin, accounting for nearly 40 % of all Canadians, and is that the second-largest province in total space. Ontario is fourth-largest in total space once the territories of the territory and district area unit enclosed. it's home to the nation's capital town, Ottawa, and also the nation's most inhabited town, Toronto.
Ontario is lined by the province of Canadian province to the west, Hudson Bay and bay to the north, and Quebec to the east and northeast, and to the south by the U.S. states of (from west to east) American state, Michigan, Ohio, Pennsylvania and big apple. the majority of Ontario's 2,700 km (1,678 mi) border with the us follows upcountry waterways: from the west at Lake of the Woods, eastward on the foremost rivers and lakes of the good Lakes/Saint Lawrence watercourse system. These area unit the Rainy watercourse, the Columbiform bird watercourse, Lake Superior, the St. Marys watercourse, Lake Huron, the St. Clair watercourse, Lake St. Clair, the river, Lake Erie, the Niagara River, lake and on the St. Lawrence watercourse from Kingston, Ontario, to the Quebec boundary simply east of county, Ontario. There’s solely concerning one kilometre (0.6 mi) of land border created from portages together with Height of Land Portage on the American state border.
Ontario is typically conceptually divided into two regions, Northern Ontario and Southern Ontario. the good majority of Ontario's population and tillable land is found within the south. In distinction, the larger, northern a part of Ontario is sparsely inhabited with cold winters and is heavily wooded.