Onchon CountyOnch'ŏn County is a county in South P'yŏngan province, North Korea. It is administered as part of Namp'o Special City.Administrative divisionsOnch'ŏn county is divided into 1 ŭp, 5 rodongjagu and 14 ri :TransportationOnch'ŏn county is served by the P'yŏngnam and Ryonggang lines of the Korean State Railway.