QuickFacts

Population per square mile in Chicago city, Illinois is

11,841.8

12.1%

of persons in Philadelphia city, Pennsylvania are 65 years and over

22.0%

of persons in Pennsylvania are under 18 years

Population per square mile in Michigan is

174.8

The population of Cook County, Illinois is

5,246,456

11.4%

of persons in California are 65 years and over

23.7%

of persons in Ohio are under 18 years

9.0%

of persons in Houston city, Texas are 65 years and over

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

The population of Harris County, Texas is

4,441,370

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates