QuickFacts

The population of Cook County, Illinois is

5,238,216

13.8%

of persons in Michigan are 65 years and over

Population per square mile in Chicago city, Illinois is

11,841.8

The population of Michigan is

9,928,300

The population of Pennsylvania is

12,784,227

The population of Philadelphia city, Pennsylvania is

1,567,442

28.0%

of persons in Harris County, Texas are under 18 years

23.1%

of persons in Chicago city, Illinois are under 18 years

31.4%

of persons 25 years+ in California have a bachelor's degree or higher

24.4%

of persons in Illinois are under 18 years

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census