[QUOTE=Northern Light;5506544]I think a bit of clarity on the this Chicago/Toronto population vs area thing is in order.
Chicago (City):
Population: 2, 695, 000
Area: 606 sq km
Toronto (City)
Population: 2,720,000 (source: Province of Ontario, 2010)
Area: 636 sq km
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Chicago Metro
Population: 9,400,000
Area: 28,000 sq km (note this includes farms, rural areas, and if were square would represent an area of 167km x 167km) Anyone who has been to Chicago knows it is nowhere near that big, this is just a census taking area, centred on Chicago.
There is a slightly smaller 'urban' area, still over 5,000km sq, which no local would ever call 'Chicago' and boasts about 8,400,000
Toronto Metro *
Population: 7,000,000
Area: 5,000sq km. (Toronto, Peel, Oakville, South York Region, Pickering, Ajax)
QUOTE]
Note that Chicago's population is now lower than it was 90 years ago:
1920 2,701,705 23.6%
1930 3,376,438 25.0%
1940 3,396,808 0.6%
1950 3,620,962 6.6%
1960 3,550,404 −1.9%
1970 3,366,957 −5.2%
1980 3,005,072 −10.7%
1990 2,783,911 −7.4%
2000 2,893,666 3.9%
2010 2,695,569 −6.8%
http://en.wikipedia.org/wiki/Demographics_of_Chicago