QuickFacts

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

The population of Cook County, Illinois is

5,238,216

12.1%

of persons in New York city, New York are 65 years and over

24.4%

of persons in Illinois are under 18 years

Population per square mile in Michigan is

174.8

The population of San Diego County, California is

3,299,521

Population per square mile in Maricopa County, Arizona is

414.9

The population of Pennsylvania is

12,784,227

12.1%

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

27.3%

of persons 25 years+ in Florida have a bachelor's degree or higher

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey