QuickFacts

23.7%

of persons in Michigan are under 18 years

The population of Maricopa County, Arizona is

4,167,947

The population of Illinois is

12,801,539

24.4%

of persons in Illinois are under 18 years

35.6%

of persons 25 years+ in Chicago city, Illinois have a bachelor's degree or higher

Population per square mile in California is

239.1

11.4%

of persons in California are 65 years and over

10.5%

of persons in Los Angeles city, California are 65 years and over

Population per square mile in Cook County, Illinois is

5,495.1

Population per square mile in North Carolina is

196.1

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census