A new technical report for the Province of Ontario's Ministry of Municipal Affairs and Housing pegs the population of Toronto's Greater Golden Horseshoe to be 14.8M people in the year 2051.
The report link is here:
https://www.hemson.com/wp-content/up...AL-16JUN20.pdf
The GGH is a rough proxy in area for Chicagoland.
The 'core' urban' area of Greater Toronto + Hamilton is estimated at 11,170,000
The GGH or commuter-shed of Toronto at 14,870,000.
What caught my attention in this as well is they peg the City of Toronto number at only 3,650,000, but other official forecasts peg it as high as 4,270,000.
At Toronto's current growth rate (2-year avg in 60,000 and change range) Toronto would reach the higher number in 20 years.