QuickFacts

23.7%

of persons in Cook County, Illinois are under 18 years

8.1%

of persons in Harris County, Texas are 65 years and over

Median household income of Pennsylvania is

$53,599

Population per square mile in North Carolina is

196.1

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

Population per square mile in Michigan is

174.8

Population per square mile in New York is

411.2

24.4%

of persons in Illinois are under 18 years

13.5%

of persons in New York are 65 years and over

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census