QuickFacts

Population per square mile in Cook County, Illinois is

5,495.1

15.4%

of persons in Pennsylvania are 65 years and over

The population of Chicago city, Illinois is

2,720,546

23.7%

of persons in Cook County, Illinois are under 18 years

15.4%

of persons in Pennsylvania are 65 years and over

23.7%

of persons in Ohio are under 18 years

Population per square mile in Maricopa County, Arizona is

414.9

Median household income of Los Angeles County, California is

$56,196

Population per square mile in Florida is

350.6

The population of Los Angeles city, California is

3,971,883

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates