QuickFacts

Population per square mile in Cook County, Illinois is

5,495.1

13.5%

of persons in New York are 65 years and over

11.4%

of persons in California are 65 years and over

The population of Chicago city, Illinois is

2,720,546

12.1%

of persons in Philadelphia city, Pennsylvania are 65 years and over

30.4%

of persons 25 years+ in Maricopa County, Arizona have a bachelor's degree or higher

Population per square mile in Cook County, Illinois is

5,495.1

The population of Cook County, Illinois is

5,238,216

23.7%

of persons in Cook County, Illinois are under 18 years

22.0%

of persons in Pennsylvania are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census