QuickFacts

The population of Illinois is

12,859,995

24.4%

of persons in Illinois are under 18 years

28.1%

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

15.4%

of persons in Pennsylvania are 65 years and over

The population of San Diego County, California is

3,263,431

10.9%

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

Population per square mile in Harris County, Texas is

2,402.4

Population per square mile in New York city, New York is

27,012.5

10.3%

of persons in Texas are 65 years and over

30.0%

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

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey