Sinseol-dong is located at the westernmost part of
Dongdaemun District. During the
Joseon Dynasty, it was a newly established village within Dongbusungsinbang (崇信坊), and for that reason, it was called
Sinseolgye (新設契, "newly established community"). During the
Gabo Reform period, it came to be known as Sinseol-dong. In the past, the area was also referred to as
Saemal ("new village") or
Sin-ri (新里). In 1914, it became Sinseol-ri of Sungin-myeon, Goyang County, and in 1936, it was reincorporated into Gyeongseong-bu. On June 11, 1943, with the implementation of the district system, it was incorporated into Dongdaemun District. On April 18, 1955, Bomun-dong 1–7-ga were separated from it. In 2009, Sinseol-dong merged with
Yongdu-dong to form the integrated administrative dong of Yongshin-dong. Later, on July 1, 2025, it was separated again and reestablished as the administrative dong of Sinseol-dong. ==Attractions==