QuickFacts

Median household income of Maricopa County, Arizona is

$54,229

24.4%

of persons in Illinois are under 18 years

23.7%

of persons in Michigan are under 18 years

Population per square mile in California is

239.1

The population of Philadelphia city, Pennsylvania is

1,567,442

The population of San Diego County, California is

3,299,521

The population of Illinois is

12,801,539

21.6%

of persons in New York city, New York are under 18 years

Population per square mile in Chicago city, Illinois is

11,841.8

24.4%

of persons in Illinois are under 18 years

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census