QuickFacts

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

23.7%

of persons in Michigan are under 18 years

The population of Maricopa County, Arizona is

4,167,947

The population of New York city, New York is

8,550,405

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

25.9%

of persons in Houston city, Texas are under 18 years

Population per square mile in Houston city, Texas is

3,501.5

Median household income of Cook County, Illinois is

$55,251

34.2%

of persons 25 years+ in New York have a bachelor's degree or higher

Population per square mile in California is

239.1

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census