QuickFacts

Population per square mile in Cook County, Illinois is

5,495.1

The population of Cook County, Illinois is

5,238,216

10.9%

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

Population per square mile in New York is

411.2

Population per square mile in Illinois is

231.1

10.3%

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

25.0%

of persons in California are under 18 years

21.6%

of persons in New York city, New York are under 18 years

35.6%

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

25.4%

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

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey