QuickFacts

11.4%

of persons in California are 65 years and over

Population per square mile in Maricopa County, Arizona is

414.9

23.4%

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

The population of Pennsylvania is

12,784,227

30.3%

of persons 25 years+ in Los Angeles County, California have a bachelor's degree or higher

10.9%

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

Population per square mile in Illinois is

231.1

Population per square mile in Cook County, Illinois is

5,495.1

23.7%

of persons in Cook County, Illinois are under 18 years

35.8%

of persons 25 years+ in Cook County, Illinois have a bachelor's degree or higher

Source: 2010 Census

Source: Population Estimates

Source: American Community Survey

Source: 2010 Census

Source: American Community Survey