QuickFacts

Population per square mile in San Diego County, California is

735.8

The population of Pennsylvania is

12,784,227

23.4%

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

Population per square mile in Maricopa County, Arizona is

414.9

Population per square mile in Ohio is

282.3

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

The population of Cook County, Illinois is

5,238,216

Population per square mile in Houston city, Texas is

3,501.5

12.1%

of persons in Philadelphia city, Pennsylvania are 65 years and over

Median household income of Pennsylvania is

$53,599

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey