Source: U.S. Census Bureau
Latest Data: 2019
Release Timing: Annually

The data given is the median age for the entire population in the state or city. According to the World Factbook, the median age "divides a population into two numerically equal groups; that is, half the people are younger than this age and half are older. It is a single index that summarizes the age distribution of a population."

The source for the median age by state is the U.S. Census Bureau, American Community Survey 1-Year Estimates, Table B01002, MEDIAN AGE BY SEX.

The source for the median age by city and for is the U.S. Census Bureau, American Community Survey 1-Year Estimates, Table B01002, MEDIAN AGE BY SEX.

The source for the age median of male and female residents is the U.S. Census Bureau, American Community Survey 1-Year Estimates, Table B01002, MEDIAN AGE BY SEX.