QuickFacts

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

12.9%

of persons in North Carolina are 65 years and over

11.9%

of persons in Cook County, Illinois are 65 years and over

The population of Michigan is

9,922,576

23.7%

of persons in Michigan are under 18 years

12.5%

of persons in Illinois are 65 years and over

12.1%

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

10.5%

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

Population per square mile in Pennsylvania is

283.9

11.4%

of persons in San Diego County, California are 65 years and over

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census