Changyon County is bordered to the north by Kwail and Songhwa and to the east by Samchon and Taetan and most of the land is flat plains with mountains forming its borders.
Changyon is bordered to the north by Kwail and Songhwa, to the east by Samch'on and T'aet'an, to the south by Ryongyon, and to the west by the Yellow Sea. Most of the land in Changyon is composed of flat plains, with mountains forming its borders. 
