QuickFacts

Population per square mile in Harris County, Texas is

2,402.4

10.9%

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

23.1%

of persons in Chicago city, Illinois are under 18 years

Population per square mile in California is

239.1

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

24.4%

of persons in Illinois are under 18 years

12.1%

of persons in Maricopa County, Arizona are 65 years and over

The population of California is

39,250,017

The population of New York city, New York is

8,550,405

12.5%

of persons in Illinois are 65 years and over

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census