QuickFacts

21.3%

of persons in Florida are under 18 years

The population of Los Angeles city, California is

3,971,883

Population per square mile in Cook County, Illinois is

5,495.1

12.1%

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

22.3%

of persons in New York are under 18 years

Median household income of Florida is

$47,507

Population per square mile in Cook County, Illinois is

5,495.1

Population per square mile in Pennsylvania is

283.9

8.1%

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

The population of Illinois is

12,801,539

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates