Jangchung-dong () is a dong (neighborhood) of Jung District, Seoul, South Korea.
The name Jangchung-dong originated from the Jangchungdan that was located in this area. Established in 1900, Jangchungdan was a place where ceremonies honoring loyal subjects and martyrs who sacrificed their lives for the country during the Eulmi Incident (the assassination of Empress Myeongseong) were held. On 1 October 1946, during the process of changing the Japanese-style neighborhood names to ones with deep Korean roots, this entire area was named 'Jangchung-dong'.