Yi County or Yixian (simplified Chinese: 黟县; traditional Chinese: 黟縣; pinyin: Yī Xiàn) is a county in Anhui Province, People's Republic of China, under the jurisdiction of Huangshan City. It has a population of 100,000 and an area of 847 square kilometres (327 sq mi). The government of Yi County is located in Biyang Town.