Administrative divisions of Mongolia

Administrative divisions of Mongolia
First level
Province aimag (аймаг) Capital city niislel (нийслэл)
Second level
District sum (сум) Municipal District düüreg (дүүрэг)
Third level
Subdistrict bag (баг) Municipal Subdistrict khoroo (хороо)

The country of Mongolia is divided into 21 provinces (Mongolian: аймаг, aimag) and the capital (нийслэл, niislel) Ulaanbaatar.^[1]

Secondary subdivisions outside Ulaanbaatar are called "sum" (сум, often transcribed as soum). In 2006, Mongolia had 331 sums.^[2] Sums are further subdivided into bags (баг). While sums always have a permanent settlement as administrative center, many bags don't.

Ulaanbaatar is divided into nine düüregs (дүүрэг, usually translated as district), which are further subdivided into khoroos (хороо, most often translated as subdistrict, microdistrict or simply district).

References

1. Mongolian Statistical Yearbook 2006, pp. 62, 63
2. Mongolian Statistical Yearbook 2006, p. 64

• Mongolian constitution, article 57