Chonma County is a kun, or county, in northwestern North Pyongan province, North Korea. It borders Kusong and Taegwan to the east, Sonchon and Tongrim to the south, Uiju and Pihyon to the west, and Sakchu to the north. It was created in 1952 from parts of Kusong and Uiju. There are abundant mountains, with the Chonma and Munsu ranges both traversing the county. The highest peak is Chonmasan, 1169 m.