Dangjin is a city in South Chungcheong Province, South Korea. It stands on the south shore of the Bay of Asan. Dangjin borders Incheon, Pyeongtaek, and Hwaseong by sea, and Seosan, Yesan, and Asan by land. Its name means "Tang ferry," and refers to the historic role of Dangjin's harbor in connecting Korea to the other side of the Yellow Sea. This role continues to be important in the city's economy, which relies on a mixture of agriculture and heavy industry.