The chief streams are the Unch'ong River (운총강), Osich'ŏn (오시천) and Taedongch'ŏn (대동천).

Unhŭng county is divided into 1 ŭp (town), 10 rodongjagu (workers' districts) and 10 ri (villages): There is relatively little agriculture, except for dry-field farms producing potatoes, wheat and soybeans.

Logging is the chief industry, with lumber processing the dominant form of manufacturing.

There are also mines, extracting the local deposits of copper, iron sulphide, lead, kaolin and tungsten.

Unhŭng is served by road and rail; the Paektusan Ch'ŏngnyŏn Line of the Korean State Railway passes through the county.