QuickFacts

15.4%

of persons in Pennsylvania are 65 years and over

11.4%

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

The population of Pennsylvania is

12,784,227

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

25.0%

of persons in California are under 18 years

23.9%

of persons in North Carolina are under 18 years

Population per square mile in Cook County, Illinois is

5,495.1

Median household income of Chicago city, Illinois is

$48,522

23.1%

of persons in Chicago city, Illinois are under 18 years

21.3%

of persons in Florida are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census