| Dangjin | |
| Native Name: | Korean: 당진 |
| Translit Lang1: | Korean |
| Settlement Type: | Municipal City |
| Translit Lang1 Type1: | Hangul |
| Translit Lang1 Info1: | Korean: 당진 |
| Translit Lang1 Type2: | Hanja |
| Translit Lang1 Info2: | Korean: {{linktext|唐|津 |
| Translit Lang1 Info3: | Dangjin |
| Translit Lang1 Info4: | Tangjin |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Hoseo |
| Population Blank1 Title: | Dialect |
| Population Blank1: | Chungcheong |
| Area Total Km2: | 664.13 |
| Population As Of: | 2002 |
| Population Total: | 117409 |
| Population Density Km2: | 176.8 |
| Parts Type: | Administrative divisions |
| Parts: | 2 eup, 9 myeon, 3 dong |
| Image Blank Emblem: | Dangjin logo.png |
| Blank Emblem Type: | Emblem of Dangjin |
Dangjin (; pronounced as /ko/) 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. The city has the same Hanja name (唐津市) as Karatsu in Saga Prefecture, Japan.
See also: Administrative divisions of South Korea. The city is divided into 2 eup, 9 myeon and 3 dong.
The name "Dangjin" was first used to refer to this area during the Joseon Dynasty. From 1413 to 1895, it was known as Dangjin-hyeon, a division of Chungcheong Province. The city achieved its present borders in 1973, with the merger of a portion of Jeongmi-myeon into Seosan's Unsan-myeon. It was originally a county but was promoted to a city on January 1, 2012, after a rapid population boost.
Being on the Yellow Sea, the port has been important for trade with China, and since early times was defended against foreign invasion by becoming a fortress city (Eupseong). According to legend, the eupseong was built in the 16th year of King Chungyeol (1290 AD), but it is currently believed to have been built during the Baekje period and modified throughout the Joseon period to prevent foreign invasion. Mianchuan Eupseong is a city with four gates in the east, west, south, and north. It was rebuilt in the 13th year of King Taejong of the Joseon Dynasty, and it was rebuilt during the reign of King Gyeongjong.[1]
As of March 2005, in Dangjin there were 33 elementary schools, 12 middle schools, and 38 preschools, serving 14,293 students.[2] In addition, there were 8 high schools. All of these organs are overseen by the Dangjin Office of Education.
The sole institution of higher education in the city is Shinsung College.
Dangjin is home to a number of factories, including steel mills operated by Hyundai Hysco and Hyundai INI Steel. These factories are supplied in part by ships docking at Dangjin Harbor, a cargo port with 5 piers, two of which are dedicated to steel coil shipping.[3]