QuickFacts

10.3%

of persons in Chicago city, Illinois are 65 years and over

21.3%

of persons in Florida are under 18 years

24.5%

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

11.4%

of persons in San Diego County, California are 65 years and over

Population per square mile in Los Angeles County, California is

2,419.6

25.0%

of persons in California are under 18 years

8.1%

of persons in Harris County, Texas are 65 years and over

Population per square mile in Illinois is

231.1

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

27,012.5

Population per square mile in Los Angeles city, California is

8,092.3

Source: 2010 Census