QuickFacts

Population per square mile in Michigan is

174.8

10.3%

of persons in Texas are 65 years and over

Population per square mile in California is

239.1

The population of Ohio is

11,614,373

Population per square mile in Philadelphia city, Pennsylvania is

11,379.5

11.4%

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

11.9%

of persons in Cook County, Illinois are 65 years and over

26.4%

of persons in Maricopa County, Arizona are under 18 years

28.0%

of persons in Harris County, Texas are under 18 years

23.1%

of persons in Chicago city, Illinois are under 18 years

Source: 2010 Census

Source: Population Estimates

Source: 2010 Census