QuickFacts

12.1%

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

Population per square mile in Illinois is

231.1

Population per square mile in Houston city, Texas is

3,501.5

The population of Cook County, Illinois is

5,238,216

The population of Maricopa County, Arizona is

4,167,947

23.7%

of persons in Cook County, Illinois are under 18 years

Median household income of Illinois is

$57,574

11.4%

of persons in California are 65 years and over

26.4%

of persons in Maricopa County, Arizona are under 18 years

The population of Georgia is

10,310,371

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates