QuickFacts

Population per square mile in Pennsylvania is

283.9

Population per square mile in Los Angeles County, California is

2,419.6

12.1%

of persons in New York city, New York are 65 years and over

22.3%

of persons in New York are under 18 years

12.1%

of persons in Maricopa County, Arizona are 65 years and over

28.0%

of persons in Harris County, Texas are under 18 years

10.9%

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

24.5%

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

The population of Los Angeles County, California is

10,170,292

12.1%

of persons in Maricopa County, Arizona are 65 years and over

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census