QuickFacts

Population per square mile in San Diego County, California is

735.8

Population per square mile in Illinois is

231.1

25.0%

of persons in California are under 18 years

Population per square mile in Pennsylvania is

283.9

12.1%

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

28.4%

of persons 25 years+ in North Carolina have a bachelor's degree or higher

The population of Houston city, Texas is

2,296,224

Population per square mile in Harris County, Texas is

2,402.4

The population of California is

39,250,017

22.5%

of persons in Philadelphia city, Pennsylvania are under 18 years

Source: 2010 Census

Source: American Community Survey

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census