QuickFacts

Population per square mile in Illinois is

231.1

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

22.3%

of persons in New York are under 18 years

26.4%

of persons in Maricopa County, Arizona are under 18 years

The population of Pennsylvania is

12,802,503

The population of New York city, New York is

8,491,079

23.7%

of persons in Cook County, Illinois are under 18 years

The population of Maricopa County, Arizona is

4,087,191

Median household income of Ohio is

$48,849

The population of Chicago city, Illinois is

2,722,389

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: American Community Survey

Source: Population Estimates