QuickFacts

21.6%

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

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

The population of Cook County, Illinois is

5,238,216

In Maricopa County, Arizona

57.3%

of females 16 years+ are in the civilian labor force

The population of Los Angeles County, California is

10,170,292

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

Population per square mile in Los Angeles city, California is

8,092.3

The population of San Diego County, California is

3,299,521

23.4%

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

11.4%

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

Source: 2010 Census

Source: Population Estimates

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census