Median age

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Definitions: Median age (years) of total population by county. As defined by the CIA's World Factbook: "This entry is the age that 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."

Data Source: U.S. Census Bureau, [Year] American Community Survey

Available at: http://factfinder2.census.gov [DP05]

Footnotes: Updated December 2018.