QuickFacts

23.1%

of persons in Chicago city, Illinois are under 18 years

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

Population per square mile in Cook County, Illinois is

5,495.1

Median household income of Ohio is

$49,429

23.7%

of persons in Cook County, Illinois are under 18 years

The population of Maricopa County, Arizona is

4,167,947

23.7%

of persons in Cook County, Illinois are under 18 years

Median household income of Houston city, Texas is

$46,187

11.4%

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

Population per square mile in Los Angeles city, California is

8,092.3

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census