QuickFacts

11.9%

of persons in Cook County, Illinois are 65 years and over

11.4%

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

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

11.4%

of persons in California are 65 years and over

12.9%

of persons in North Carolina are 65 years and over

Population per square mile in North Carolina is

196.1

Median household income of California is

$61,489

17.3%

of persons in Florida are 65 years and over

23.4%

of persons in San Diego County, California are under 18 years

23.1%

of persons in Chicago city, Illinois are under 18 years

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census