Three main geological regions make up Ontario: the Great Lakes - St. Lawrence Lowlands, the Canadian Shield and the Hudson Bay Lowlands. The latter are narrow coastal plains bordering Hudson Bay and James Bay; the land is wet and covered by scrub growth. The Canadian Shield, covering the rest of northern Ontario from Lake Superior to Hudson Bay and extending into the southern part of the province, is a vast rocky plateau. Although the soil is poor and not well suited to largescale farming, there is a wealth of minerals, forests and water power.
The Canadian Shield and the Hudson Bay Lowlands cover 90% of the province's 1,068,580 km2 of territory, but are home to only 10% of the population. Northern Ontario's towns were built because of the railway, and today rails and roads carry the products of the mines and mills southward. Farther north, travel is often limited to air and water. The extremes of the northern climate are a fact of life there. At Winisk, mean daily temperatures reach only 12ºC - 15ºC in July, dropping to -25ºC in January.
The five Great Lakes are the most visible results of the ice age in Ontario, and the biggest, Lake Superior, is the world's largest body of fresh water.
The Great Lakes-St. Lawrence Lowlands make up the rest of southern Ontario and contain most of the population, industry, commerce and agricultural lands. The Lowlands include the Windsor-Thousand Islands-St. Lawrence Valley triangle. Mean annual summer temperatures reach 22ºC in the south, where the temperate climate and fertile soils nurture a major agricultural industry. This relatively small area has more than half of Canada's best agricultural land.
Toronto, Ontario's capital and Canada's largest city, with a regional population of more than four million, is Canada's leading producer of manufactured goods and headquarters of a large number of Canadian companies. Ottawa, the bilingual, bicultural national capital, sits at the junction of the Gatineau, Rideau and Ottawa rivers.
In 1774, the British ruled over southern Ontario, then part of the British colony of Quebec. Under the Constitutional Act of 1791, "Quebec" was divided in two and Ontario renamed Upper Canada. This became necessary with the tremendous influx of Loyalist refugees after the American Revolution.
In 1840, the Act of Union saw Upper and Lower Canada reunited, this time with the name Canada. The two regions, Canada West and Canada East, took part in the 1864 Confederation debate and, when the Dominion of Canada was created in 1867, became the separate provinces of Ontario and Quebec.
In 1991, Ontario had almost 250,000 people of Aboriginal, Métis or Inuit origin.
With approximately 11 million people, Ontario is the country's most heavily populated province. While English is the official language, Ontario's Francophones play an essential part in the province's cultural life and are the largest language minority. The provincial government provides services in French in those regions where the Francophone population is sufficiently high.
Automobiles are Ontario's major manufacturing industry and most important export, employing more than 140,000 people and providing 26% of Canada's total exports in 1989.
Mining has always played an important role in the development of Ontario's economy. Extraction of gold, nickel, copper, uranium and zinc represents a multi-billion-dollar business.
Many Ontario towns have at least one industry connected to forestry. Fully 87% of the forest land is owned by the provincial government, which licenses logging rights. The forest industry accounts for 5.8 percent of Ontario's exports.
Financial industries are also a source of prosperity. Toronto is the world's fourth-largest capital market; its stock exchange is North America's second-largest by volume and third-largest by value traded.
Tourism, the province's third-largest industry, is also important to the Ontario economy. In 1990, tourist spending of more than $9.5 billion generated about $13.4 billion in total revenue for the province and more than 320,000 person-years of employment.