QuickFacts

Population per square mile in Illinois is

231.1

The population of New York city, New York is

8,550,405

Population per square mile in Los Angeles County, California is

2,419.6

11.4%

of persons in San Diego County, California are 65 years and over

Median household income of Cook County, Illinois is

$55,251

The population of Illinois is

12,801,539

23.7%

of persons in Ohio are under 18 years

12.1%

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

12.9%

of persons in North Carolina are 65 years and over

Median household income of Pennsylvania is

$53,599

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey