Dafeng () is a coastal district under the administration of Yancheng, Jiangsu province, China. Located on the Jiangsu North Plain with a coastline of 112 km , Dafeng was historically one of the largest salt-making areas in China and now is famed for its well preserved eco-system and numerous national conservation parks. The district has the largest national nature reserve for a rare deer species, Père David's Deer or Milu (麋鹿 ) in Chinese. It borders the prefecture-level city of Taizhou to the southwest.