450 villages. Yanshan County is located in Cangzhou City, Hebei Province, with a total area of 800 square kilometers. It is adjacent to Hangang Expressway in the east, Bohai Sea in the west, Beijing and Tianjin in the north and Shandong in the south. According to the query of official website, the government of Yanshan County has 450 administrative villages in the whole county. By 20221October 20th, the resident population of Yanshan County was 4 1 1356.