QuickFacts

23.7%

of persons in Michigan are under 18 years

12.1%

of persons in Philadelphia city, Pennsylvania are 65 years and over

25.0%

of persons in California are under 18 years

Population per square mile in California is

239.1

Population per square mile in Georgia is

168.4

In Cook County, Illinois

61.0%

of females 16 years+ are in the civilian labor force

11.9%

of persons in Cook County, Illinois are 65 years and over

The population of California is

39,250,017

The population of Cook County, Illinois is

5,238,216

The population of Maricopa County, Arizona is

4,167,947

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates