QuickFacts

Population per square mile in Los Angeles city, California is

8,092.3

21.6%

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

Population per square mile in Maricopa County, Arizona is

414.9

Population per square mile in San Diego County, California is

735.8

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

23.7%

of persons in Michigan are under 18 years

10.5%

of persons in Los Angeles city, California are 65 years and over

23.7%

of persons in Ohio are under 18 years

15.4%

of persons in Pennsylvania are 65 years and over

The population of Harris County, Texas is

4,538,028

Source: 2010 Census

Source: Population Estimates