In Canada, all of these stats can be found from the Stats Canada website:
Statistics Canada: Canada's national statistical agency / Statistique Canada : Organisme statistique national du Canada
It contains all kinds of census data about every part of the country. If you're looking for facts, this is where you'd go. Unfortunately, City-Data - this website, is only a useful resource for obtaining city data on American cities, not Canadian cities.
Note that the last Canadian census was taken in 2006, the next one will be in 2011.
Here's a good overview of Vancouver's census data:
http://www12.statcan.ca/census-recen...&B1=All&Custom=