QuickFacts

23.1%

of persons in Chicago city, Illinois are under 18 years

24.4%

of persons in Illinois are under 18 years

Median household income of Cook County, Illinois is

$55,251

The population of San Diego County, California is

3,299,521

Population per square mile in Cook County, Illinois is

5,495.1

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

11.4%

of persons in San Diego County, California are 65 years and over

10.7%

of persons in Georgia are 65 years and over

Median household income of Houston city, Texas is

$46,187

10.9%

of persons in Los Angeles County, California are 65 years and over

Source: 2010 Census

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census