QuickFacts

Population per square mile in California is

239.1

23.7%

of persons in Cook County, Illinois are under 18 years

15.4%

of persons in Pennsylvania are 65 years and over

22.0%

of persons in Pennsylvania are under 18 years

10.9%

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

24.5%

of persons in Los Angeles County, California are under 18 years

Median household income of Maricopa County, Arizona is

$54,229

23.9%

of persons in North Carolina are under 18 years

22.3%

of persons in New York are under 18 years

Population per square mile in Michigan is

174.8

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census