QuickFacts

The population of Illinois is

12,801,539

23.7%

of persons in Ohio are under 18 years

Population per square mile in Maricopa County, Arizona is

414.9

27.3%

of persons in Texas are under 18 years

23.1%

of persons in Los Angeles city, California are under 18 years

Population per square mile in North Carolina is

196.1

Population per square mile in Harris County, Texas is

2,402.4

10.5%

of persons in Los Angeles city, California are 65 years and over

Population per square mile in Cook County, Illinois is

5,495.1

The population of Los Angeles County, California is

10,170,292

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates