QuickFacts

24.4%

of persons in Illinois are under 18 years

30.4%

of persons 25 years+ in Maricopa County, Arizona have a bachelor's degree or higher

The population of Cook County, Illinois is

5,238,216

The population of San Diego County, California is

3,299,521

12.1%

of persons in Philadelphia city, Pennsylvania are 65 years and over

12.1%

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

28.0%

of persons in Harris County, Texas are under 18 years

8.1%

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

28.8%

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

Population per square mile in San Diego County, California is

735.8

Source: 2010 Census

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census