QuickFacts

11.9%

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

25.7%

of persons in Georgia are under 18 years

12.1%

of persons in Maricopa County, Arizona are 65 years and over

26.4%

of persons in Maricopa County, Arizona are under 18 years

Population per square mile in San Diego County, California is

735.8

Population per square mile in Florida is

350.6

13.5%

of persons in New York are 65 years and over

Population per square mile in Texas is

96.3

The population of Chicago city, Illinois is

2,720,546

27.3%

of persons in Texas are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census