QuickFacts

The population of Illinois is

12,859,995

In Cook County, Illinois

61.2%

of females 16 years+ are in the civilian labor force

Population per square mile in Michigan is

174.8

Population per square mile in Los Angeles city, California is

8,092.3

24.4%

of persons in Illinois are under 18 years

23.4%

of persons in San Diego County, California are under 18 years

Population per square mile in Michigan is

174.8

Population per square mile in Illinois is

231.1

Population per square mile in Maricopa County, Arizona is

414.9

Population per square mile in Pennsylvania is

283.9

Source: Population Estimates

Source: American Community Survey

Source: 2010 Census