QuickFacts

24.4%

of persons in Illinois are under 18 years

The population of Cook County, Illinois is

5,238,216

Population per square mile in Maricopa County, Arizona is

414.9

12.1%

of persons in Maricopa County, Arizona are 65 years and over

35.8%

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

10.3%

of persons in Chicago city, Illinois are 65 years and over

25.7%

of persons in Georgia are under 18 years

The population of Harris County, Texas is

4,538,028

Population per square mile in Harris County, Texas is

2,402.4

13.8%

of persons in Michigan are 65 years and over

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census