QuickFacts

15.4%

of persons in Pennsylvania are 65 years and over

23.7%

of persons in Ohio are under 18 years

12.5%

of persons in Illinois are 65 years and over

12.1%

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

Population per square mile in New York is

411.2

Population per square mile in Chicago city, Illinois is

11,841.8

The population of North Carolina is

10,042,802

The population of Cook County, Illinois is

5,246,456

26.4%

of persons in Maricopa County, Arizona are under 18 years

Population per square mile in Houston city, Texas is

3,501.5

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census