Yanshan County (simplified Chinese: 盐山县; traditional Chinese: 鹽山縣; pinyin: Yánshān Xiàn; literally: "Salt Mountain") is a county of southeastern Hebei province, China, bordering Shandong to the south and east. It is under the administration of Cangzhou City, and it has a population of 410,000 residing in an area of 795 km2 (307 sq mi). China National Highway 205 runs northwest-southeast through the county.