QuickFacts

24.4%

of persons in Illinois are under 18 years

12.5%

of persons in Illinois are 65 years and over

The population of Illinois is

12,859,995

23.1%

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

Population per square mile in Harris County, Texas is

2,402.4

Median household income of San Diego County, California is

$63,996

Population per square mile in Cook County, Illinois is

5,495.1

17.3%

of persons in Florida are 65 years and over

24.5%

of persons 25 years+ in Philadelphia city, Pennsylvania have a bachelor's degree or higher

Median household income of Cook County, Illinois is

$54,828

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: American Community Survey