QuickFacts

The population of Los Angeles County, California is

10,170,292

Population per square mile in Cook County, Illinois is

5,495.1

11.4%

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

25.0%

of persons in California are under 18 years

Population per square mile in Pennsylvania is

283.9

The population of Maricopa County, Arizona is

4,167,947

26.1%

of persons 25 years+ in Ohio have a bachelor's degree or higher

27.3%

of persons in Texas are under 18 years

22.0%

of persons in Pennsylvania are under 18 years

13.5%

of persons in New York are 65 years and over

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: American Community Survey

Source: 2010 Census