Pyŏktong County is a kun, or county, in northern North P'yŏngan province, North Korea. It lies in the valley of the Yalu River, and borders China to the north. Within North Korea, it is bounded by Tongch'ang to the south, Ch'angsŏng to the west, and Usi county in Chagang province to the east. It was separated from Usi in 1952, as part of a nationwide reorganization of local government.