QuickFacts

15.4%

of persons in Pennsylvania are 65 years and over

26.4%

of persons in Maricopa County, Arizona are under 18 years

27.6%

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

13.8%

of persons in Michigan are 65 years and over

8.1%

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

Median household income of Cook County, Illinois is

$55,251

The population of Illinois is

12,801,539

Population per square mile in Illinois is

231.1

Population per square mile in Los Angeles County, California is

2,419.6

The population of Los Angeles County, California is

10,170,292

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates