QuickFacts

The population of Illinois is

12,801,539

Population per square mile in Chicago city, Illinois is

11,841.8

11.4%

of persons in San Diego County, California are 65 years and over

13.5%

of persons in New York are 65 years and over

Population per square mile in Maricopa County, Arizona is

414.9

Population per square mile in Harris County, Texas is

2,402.4

Median household income of San Diego County, California is

$64,309

Population per square mile in Florida is

350.6

23.7%

of persons in Cook County, Illinois are under 18 years

The population of California is

39,250,017

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census

Source: Population Estimates