QuickFacts

Median household income of Cook County, Illinois is

$55,251

Population per square mile in Ohio is

282.3

Median household income of Philadelphia city, Pennsylvania is

$38,253

Median household income of Pennsylvania is

$53,599

The population of Pennsylvania is

12,784,227

Population per square mile in Maricopa County, Arizona is

414.9

25.0%

of persons in California are under 18 years

14.1%

of persons in Ohio are 65 years and over

23.7%

of persons in Ohio are under 18 years

Population per square mile in Cook County, Illinois is

5,495.1

Source: American Community Survey

Source: 2010 Census

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census