QuickFacts

Population per square mile in Chicago city, Illinois is

11,841.8

24.5%

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

11.9%

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

24.5%

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

10.9%

of persons in Los Angeles County, California are 65 years and over

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

The population of Pennsylvania is

12,784,227

The population of Ohio is

11,614,373

Median household income of Harris County, Texas is

$54,457

25.7%

of persons in Georgia are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: American Community Survey

Source: 2010 Census