QuickFacts

12.1%

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

Population per square mile in Illinois is

231.1

12.1%

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

The population of Maricopa County, Arizona is

4,167,947

23.1%

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

10.9%

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

23.7%

of persons in Ohio are under 18 years

The population of San Diego County, California is

3,299,521

22.0%

of persons in Pennsylvania are under 18 years

Population per square mile in Florida is

350.6

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census