Amsa-dong (Korean: 암사동) is a dong (neighbourhood) of Gangdong District, Seoul, South Korea.

[1][2] The dong is well known for the Amsa-dong Prehistoric Settlement Site, in which Neolithic remains were excavated after a large amount of diagonal-line patterned earthenware(빗살무늬토기) was exposed by a flood in 1925.

[3][4] It is thought to be a Jomonic settlement which existed prior to the spread of Songgukri-cultural sphere in Korean peninsula during the Korean bronze age.

In Amsa Sam-dong, a festival named Amsa sunsa cultural festival is hold annually and parade is performed.

There is only one high school in Amsa-dong named Sunsa highschool.