QuickFacts

The population of Michigan is

9,928,300

13.5%

of persons in New York are 65 years and over

Population per square mile in San Diego County, California is

735.8

Population per square mile in Cook County, Illinois is

5,495.1

23.7%

of persons in Michigan are under 18 years

15.4%

of persons in Pennsylvania are 65 years and over

Population per square mile in Florida is

350.6

25.0%

of persons in California are under 18 years

Population per square mile in San Diego County, California is

735.8

23.4%

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

Source: Population Estimates

Source: 2010 Census