QuickFacts

Median household income of California is

$61,818

Population per square mile in Cook County, Illinois is

5,495.1

Population per square mile in Houston city, Texas is

3,501.5

Population per square mile in Maricopa County, Arizona is

414.9

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

10.3%

of persons in Texas are 65 years and over

Population per square mile in California is

239.1

28.0%

of persons in Harris County, Texas are under 18 years

The population of San Diego County, California is

3,299,521

25.9%

of persons in Houston city, Texas are under 18 years

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census