QuickFacts

10.7%

of persons in Georgia are 65 years and over

24.4%

of persons in Illinois are under 18 years

The population of Cook County, Illinois is

5,238,216

The population of Maricopa County, Arizona is

4,167,947

The population of Chicago city, Illinois is

2,720,546

Population per square mile in Harris County, Texas is

2,402.4

Population per square mile in San Diego County, California is

735.8

22.0%

of persons in Pennsylvania are under 18 years

12.9%

of persons in North Carolina are 65 years and over

23.1%

of persons in Los Angeles city, California are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census