QuickFacts

Population per square mile in Illinois is

231.1

28.0%

of persons in Harris County, Texas are under 18 years

26.4%

of persons in Maricopa County, Arizona are under 18 years

24.5%

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

10.3%

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

The population of Florida is

20,612,439

Population per square mile in San Diego County, California is

735.8

30.4%

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

10.7%

of persons in Georgia are 65 years and over

23.7%

of persons in Ohio are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census