Population of the Chicago Metropolitan Area. Today, Chicago the city makes up only just over a quarter of the wider Chicago-Joilet-Naperville Metropolitan Area's population. According to data from the 2010 census, the CJN Metro Area is home to an impressive 9,504,753 people.Largest Cities in North America
Mexico City (Mexico): 8,854,600.
New York City (US): 8,550,405.
Los Angeles (US): 3,971,883.
Toronto (Canada): 2,826,498.
Chicago (US): 2,720,546.
Houston (US): 2,296,224.
Havana (Cuba): 2,117,625.
Ecatepec de Morelos (Mexico): 1,760,705.
http://worldpopulationreview.com/continents/north-america-population/