isaidso
Senior Member
Wouldn't Mississauga count as a Metro area as it is its own city of over 700K. I know Mississauga doesn't have quite the office concentration, but I believe it would be part of a Downtown. (I guess this is the struggle Mississauga has being in the shadow or Toronto).
Cities are given CMA (metro) designation by Statistics Canada when they've registered 100,000 people for 2 censuses in a row. There may be some other criteria as well. Mississauga has always been part of the Toronto CMA. They don't break bits off because they've become large in their own right.
Statistics Canada doesn't combine metros that have grown into each other either. Hence, Hamilton, Oshawa, and Toronto are all separate metros. Once a metro, always a metro.