QuickFacts

Population per square mile in Cook County, Illinois is

5,495.1

Population per square mile in Pennsylvania is

283.9

The population of Los Angeles County, California is

10,116,705

Median household income of Los Angeles County, California is

$55,870

23.9%

of persons in North Carolina are under 18 years

10.5%

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

The population of Philadelphia city, Pennsylvania is

1,560,297

25.0%

of persons in California are under 18 years

12.5%

of persons in Illinois are 65 years and over

The population of San Diego County, California is

3,263,431

Source: 2010 Census

Source: Population Estimates

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates