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

23.9%

of persons in North Carolina are under 18 years

12.1%

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

12.9%

of persons in North Carolina are 65 years and over

28.0%

of persons in Harris County, Texas are under 18 years

Median household income of Maricopa County, Arizona is

$54,229

Population per square mile in Cook County, Illinois is

5,495.1

Population per square mile in Michigan is

174.8

Population per square mile in Florida is

350.6

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census