The Kangnam Mountains rise in the southeast of Sakju with its highest peak Munsan at 1046 m. The overall terrain is rugged, with only 13% of the county's area under cultivation, as compared to 80% which is forested.
Administrative divisions
Sakju county is divided into 1 ŭp (town), 6 rodongjagu (workers' districts) and 18 ri (villages):
Sakju-ŭp (삭주읍)
Ch'ŏngsŏng-rodongjagu (청성로동자구)
Ch'ŏngsu-rodongjagu (청수로동자구)
Namsa-rodongjagu (남사로동자구)
Sap'yŏng-rodongjagu (사평로동자구)
Sup'ung-rodongjagu (수풍로동자구)
Taedae-rodongjagu (대대로동자구)
Chwa-ri (좌리)
Ch'ŏn'gap-ri (천갑리)
Ch'udae-ri (추대리)
Kugong-ri (구곡리)
Kŭmbu-ri (금부리)
Naeung-ri (내옥리)
Okkang-ri (옥강리)
Pangsal-li (방산리)
Pup'yŏng-ri (부평리)
Puksa-ri (북사리)
P'anmang-ri (판막리)
Ryongam-ri (룡암리)
Sanggwang-ri (상광리)
Sinp'ung-ri (신풍리)
Sinsŏ-ri (신서리)
Tang'ong-ri (당옥리)
Toryŏng-ri (도령리)
Yŏnsang-ri (연상리)
Climate
The year-round average temperature is 8.1 °C, with an average of -10.1 °C in January and 23.4 °C in August.
Livestock farming is important to the local economy; Sakju leads the province in the number of hogs raised. In crop farming, local crops include rice, soybeans, sweet potatoes, gochu peppers, and fruit. In addition, there is a large hydroelectric power station on the Yalu at Sup'ung Dam.