Ontario is the most populous province, with (in 2003) just over 12 million people, and Quebec at 7 million & some.
http://www.canadainfolink.ca/charttwo.htm
However, I wonder what the relative political strength is. I mean, there must be some ridings with more people than others, so maybe they're about equal in political power?
Toronto is such a huge city. In fact there was a massive migration from Montreal to Toronto during the separatist years.
Maybe someone who understands the system better than I do can enlighten us.
The Liberals have filled Ontario with leftist immigrants, this is why Toronto votes Liberal. They pander to the immigrants in the most disgusting way to ensure they get the vote. Outside of the Toronto area, Ontario is decidedly more concervative. Our province is usually run by a conservative provincial government, but my guess is that immigrants tend not to vote provincially, but turn out heavily for federal elections. The gay marriage issue is starting to turn staunch Roman Catholics against the Liberal party, so that's a good thing, because we are a predominantly Catholic nation, well over half.