QuickFacts

The population of Chicago city, Illinois is

2,720,546

11.9%

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

Population per square mile in North Carolina is

196.1

28.0%

of persons in Harris County, Texas are under 18 years

Population per square mile in San Diego County, California is

735.8

The population of Pennsylvania is

12,784,227

The population of Harris County, Texas is

4,538,028

21.3%

of persons in Florida are under 18 years

23.7%

of persons in Cook County, Illinois are under 18 years

21.6%

of persons in New York city, New York are under 18 years

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census