Sum (country subdivision)

Sum, sumu, sumon, and somon (Plural: sumd) are a type of administrative district used in China, Mongolia, and Russia.

In Inner Mongolia, a sumu (Mongolian: ᠰᠤᠮᠤ, transliteration: sumu; Chinese: 苏木, pinyin: sūmù) is a township-level political/administrative division. The sumu division is equivalent to a township but is unique to Inner Mongolia. It is therefore larger than a gaqa (Mongolian: ᠭᠠᠴᠠᠭᠠ гацаа) and smaller than a banner (the Inner Mongolia equivalent of the county-level division).

Sumu whose population is predominated by ethnic minorities are designated ethnic sumu – parallel with the ethnic township in the rest of China. As of 2010^[update], there is only one ethnic sumu in China, the Evenk Ethnic Sumu.