QuickFacts

Population per square mile in Maricopa County, Arizona is

414.9

Population per square mile in Cook County, Illinois is

5,495.1

11.4%

of persons in California are 65 years and over

Population per square mile in Chicago city, Illinois is

11,841.8

24.4%

of persons in Illinois are under 18 years

Population per square mile in Houston city, Texas is

3,501.5

Population per square mile in Cook County, Illinois is

5,495.1

In Pennsylvania

58.3%

of females 16 years+ are in the civilian labor force

Median household income of Cook County, Illinois is

$55,251

12.5%

of persons in Illinois are 65 years and over

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census