QuickFacts

23.1%

of persons in Chicago city, Illinois are under 18 years

25.0%

of persons in California are under 18 years

The population of San Diego County, California is

3,299,521

Median household income of California is

$61,818

Median household income of Philadelphia city, Pennsylvania is

$38,253

The population of Pennsylvania is

12,784,227

Population per square mile in North Carolina is

196.1

Population per square mile in Illinois is

231.1

9.0%

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

Population per square mile in Cook County, Illinois is

5,495.1

Source: 2010 Census

Source: Population Estimates

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census