QuickFacts

The population of Illinois is

12,801,539

The population of Cook County, Illinois is

5,238,216

Population per square mile in California is

239.1

24.5%

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

Median household income of Illinois is

$57,574

35.7%

of persons 25 years+ in San Diego County, California have a bachelor's degree or higher

30.3%

of persons 25 years+ in Los Angeles County, California have a bachelor's degree or higher

23.1%

of persons in Chicago city, Illinois are under 18 years

11.9%

of persons in Cook County, Illinois are 65 years and over

29.5%

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

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: American Community Survey