QuickFacts

21.3%

of persons in Florida are under 18 years

17.3%

of persons in Florida are 65 years and over

Population per square mile in Harris County, Texas is

2,402.4

12.1%

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

The population of California is

39,144,818

Population per square mile in Los Angeles County, California is

2,419.6

24.4%

of persons in Illinois are under 18 years

The population of Chicago city, Illinois is

2,722,389

11.4%

of persons in San Diego County, California are 65 years and over

Median household income of Cook County, Illinois is

$54,828

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey