QuickFacts

Population per square mile in Cook County, Illinois is

5,495.1

13.5%

of persons in New York are 65 years and over

The population of California is

39,250,017

12.1%

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

Population per square mile in Pennsylvania is

283.9

22.0%

of persons in Pennsylvania are under 18 years

12.1%

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

15.4%

of persons in Pennsylvania are 65 years and over

25.0%

of persons in California are under 18 years

26.1%

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

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey