QuickFacts

13.8%

of persons in Michigan are 65 years and over

23.4%

of persons in San Diego County, California are under 18 years

The population of California is

39,250,017

The population of Philadelphia city, Pennsylvania is

1,567,442

The population of Maricopa County, Arizona is

4,167,947

12.1%

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

The population of Ohio is

11,614,373

23.1%

of persons in Chicago city, Illinois are under 18 years

30.4%

of persons 25 years+ in Maricopa County, Arizona have a bachelor's degree or higher

Population per square mile in Harris County, Texas is

2,402.4

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: American Community Survey

Source: 2010 Census