QuickFacts

Population per square mile in Illinois is

231.1

24.4%

of persons in Illinois are under 18 years

24.5%

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

Population per square mile in Michigan is

174.8

12.1%

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

26.8%

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

15.4%

of persons in Pennsylvania are 65 years and over

Population per square mile in New York city, New York is

27,012.5

Population per square mile in Illinois is

231.1

12.1%

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

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census