QuickFacts

12.1%

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

10.3%

of persons in Chicago city, Illinois are 65 years and over

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

10.9%

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

The population of Maricopa County, Arizona is

4,167,947

Population per square mile in Illinois is

231.1

9.0%

of persons in Houston city, Texas are 65 years and over

The population of Philadelphia city, Pennsylvania is

1,567,442

Population per square mile in Ohio is

282.3

Population per square mile in Cook County, Illinois is

5,495.1

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census