I knew, as a Canadian, that our population is extraordinarily concentrated in a few small urban areas. This belies the idea that Canada is a large country -- the Canadian people are in fact quite small in number, and aren't even particularly well-dispersed.
But I didn't realize how concentrated Ontario's population actually is. If, on a map, you drew a line of latitude from Ottawa west to Georgian Bay, all the land in Ontario south of that point would consist of only 15% of the land, but over 95% of the population -- more than 11 million of Ontario's 12.5 million people. This also implies that this line and the shores of Lakes Huron, Erie, and Ontario would encompass fully one-third of Canada's population.
Yeesh. A beautiful country, and we're barely living in it.