Canada’s most populous province holds nearly two-fifths of the country
Ontario, Canada’s southernmost and most populous province, counted more than 14 million residents in 2021—about 38.5 percent of the national total. Roughly 250,000 freshwater lakes and a name likely meaning “great lake” or “beautiful water” define its brand.
Manitoba lies west, Hudson and James Bays north, Quebec east; southward the border touches Minnesota through New York across the Great Lakes. Point Pelee, a peninsula in Lake Erie near Windsor, marks the southern tip of mainland Canada, with Pelee and Middle islands lying slightly farther south, below 42 degrees north. Southern Ontario concentrates people, farms, and manufacturing; Northern Ontario stays forested, cold, and thin. The south itself divides into Central, Eastern and Southwestern Ontario plus the Golden Horseshoe.
Over half the land is Canadian Shield rich in minerals but poor for ploughs; Hudson Bay Lowlands sprawl as swampy near-empty fringe. Mountains are rare, but uplands rise across the Shield and along the Niagara Escarpment, and the highest point, Ishpatina Ridge, reaches 693 metres. Carolinian forest covers much of the south-west, while the fertile Great Lakes–Saint Lawrence lowlands have largely traded woods for farms, factories and towns.
Three air masses shape the weather: dry Arctic air from the north, Pacific polar air crossing the Prairies, and warm, humid air from the south. The Great Lakes release stored heat in autumn and winter, delaying and softening winter near their shores, while Central and Eastern Ontario have warm summers, long snowy winters and a humid continental climate. In the north-east, as far south as Kirkland Lake, cold Hudson Bay water keeps summers cooler than the latitude would suggest.
Wyandot Ontarí:io (“great lake”) or Iroquoian skanadario (“sparkling water”) are the leading etymologies. Shield rock and lake country set mining and cottage economies beside the Golden Horseshoe’s factories.
Source: Ontario
