QuickFacts

Population per square mile in Harris County, Texas is

2,402.4

12.1%

of persons in Maricopa County, Arizona are 65 years and over

23.4%

of persons in San Diego County, California are under 18 years

Population per square mile in Chicago city, Illinois is

11,841.8

10.9%

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

21.3%

of persons in Florida are under 18 years

Population per square mile in Pennsylvania is

283.9

32.3%

of persons 25 years+ in Illinois have a bachelor's degree or higher

Median household income of Pennsylvania is

$53,599

13.8%

of persons in Michigan are 65 years and over

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census