QuickFacts

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

Population per square mile in Maricopa County, Arizona is

414.9

The population of Harris County, Texas is

4,538,028

Population per square mile in New York is

411.2

Population per square mile in Los Angeles County, California is

2,419.6

21.6%

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

35.7%

of persons 25 years+ in San Diego County, California have a bachelor's degree or higher

The population of San Diego County, California is

3,299,521

Population per square mile in Michigan is

174.8

Population per square mile in Illinois is

231.1

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census