QuickFacts

Population per square mile in California is

239.1

24.5%

of persons in Los Angeles County, California are under 18 years

The population of San Diego County, California is

3,299,521

Median household income of Cook County, Illinois is

$55,251

Median household income of Pennsylvania is

$53,599

13.8%

of persons in Michigan are 65 years and over

24.5%

of persons in Los Angeles County, California are under 18 years

26.4%

of persons in Maricopa County, Arizona are under 18 years

Population per square mile in New York city, New York is

27,012.5

The population of Philadelphia city, Pennsylvania is

1,567,442

Source: 2010 Census

Source: Population Estimates

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates