|This Web book is based on public domain material provided by the US government and is available in several versions. See the editorial for more information.|
Provincial-level or second-level unit of administration in Mongolia since 1921. Aymags are divided into somon (q.v.). Traditionally, an aymag was a tribe.
Mongolia is divided into 21 aymags or provinces. "Aymag" is the Mongolian word for prefecture. Because Mongolia was a province of China though, it was divided into aymags (prefectures of the province of Outer Mongolia). They kept it like this even when they gained their independence.