QuickFacts

23.7%

of persons in Ohio are under 18 years

10.9%

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

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

24.4%

of persons in Illinois are under 18 years

Population per square mile in Maricopa County, Arizona is

414.9

13.5%

of persons in New York are 65 years and over

23.7%

of persons in Cook County, Illinois are under 18 years

12.5%

of persons in Illinois are 65 years and over

The population of Florida is

20,612,439

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census