Administrative divisions of Mongolia
The country of Mongolia is divided into 21 provinces and the capital Ulaanbaatar.
Secondary subdivisions outside Ulaanbaatar are called "sum". In 2006, Mongolia had 331 sums. Sums are further subdivided into bags. While sums always have a permanent settlement as administrative center, many bags don't.
Ulaanbaatar is divided into nine düüregs, which are further subdivided into khoroos.Officially, Mongolia is divided into 3 administrative tiers, with different types of administrative unit on each tier:
