QuickFacts

Population per square mile in California is

239.1

Population per square mile in Harris County, Texas is

2,402.4

The population of San Diego County, California is

3,263,431

Population per square mile in Texas is

96.3

24.4%

of persons in Illinois are under 18 years

The population of Florida is

20,271,272

Population per square mile in California is

239.1

26.4%

of persons in Maricopa County, Arizona are under 18 years

The population of Philadelphia city, Pennsylvania is

1,560,297

23.1%

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

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census