QuickFacts

The population of Cook County, Illinois is

5,238,216

The population of Michigan is

9,928,300

Population per square mile in San Diego County, California is

735.8

22.3%

of persons in New York are under 18 years

The population of Los Angeles city, California is

3,971,883

23.4%

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

24.4%

of persons in Illinois are under 18 years

The population of Chicago city, Illinois is

2,720,546

Population per square mile in Pennsylvania is

283.9

22.0%

of persons in Pennsylvania are under 18 years

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census