QuickFacts

The population of California is

39,250,017

23.1%

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

11.4%

of persons in San Diego County, California are 65 years and over

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

24.5%

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

25.9%

of persons in Houston city, Texas are under 18 years

28.0%

of persons in Harris County, Texas are under 18 years

15.4%

of persons in Pennsylvania are 65 years and over

The population of Los Angeles County, California is

10,170,292

Population per square mile in Harris County, Texas is

2,402.4

Source: Population Estimates

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census