QuickFacts

28.0%

of persons in Harris County, Texas are under 18 years

23.4%

of persons in San Diego County, California are under 18 years

24.4%

of persons in Illinois are under 18 years

Population per square mile in Michigan is

174.8

Population per square mile in Texas is

96.3

Population per square mile in Maricopa County, Arizona is

414.9

22.3%

of persons in New York are under 18 years

Population per square mile in Los Angeles city, California is

8,092.3

10.7%

of persons in Georgia are 65 years and over

17.3%

of persons in Florida are 65 years and over

Source: 2010 Census