QuickFacts

11.9%

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

24.5%

of persons in Los Angeles County, California are under 18 years

23.4%

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

10.7%

of persons in Georgia are 65 years and over

15.4%

of persons in Pennsylvania are 65 years and over

The population of Illinois is

12,801,539

The population of Ohio is

11,614,373

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

27,012.5

12.1%

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

10.5%

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

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census