QuickFacts

Population per square mile in Pennsylvania is

283.9

10.3%

of persons in Chicago city, Illinois are 65 years and over

14.1%

of persons in Ohio are 65 years and over

The population of Ohio is

11,614,373

The population of Chicago city, Illinois is

2,720,546

Population per square mile in Florida is

350.6

Median household income of San Diego County, California is

$64,309

11.9%

of persons in Cook County, Illinois are 65 years and over

The population of Illinois is

12,801,539

The population of Philadelphia city, Pennsylvania is

1,567,442

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates