QuickFacts

12.5%

of persons in Illinois are 65 years and over

10.3%

of persons in Texas are 65 years and over

The population of Maricopa County, Arizona is

4,167,947

Population per square mile in Florida is

350.6

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

12.1%

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

The population of Texas is

27,862,596

28.0%

of persons in Harris County, Texas are under 18 years

12.1%

of persons in Philadelphia city, Pennsylvania are 65 years and over

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census