QuickFacts

23.9%

of persons in North Carolina are under 18 years

12.1%

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

Population per square mile in Pennsylvania is

283.9

10.5%

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

The population of San Diego County, California is

3,299,521

The population of Pennsylvania is

12,784,227

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

Population per square mile in San Diego County, California is

735.8

25.4%

of persons 25 years+ in Philadelphia city, Pennsylvania have a bachelor's degree or higher

12.5%

of persons in Illinois are 65 years and over

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census