Gangdong District (Korean: 강동구; RR: Gangdong-gu) is one of the 25 districts that make up the city of Seoul.

Gangdong, literally means "east of river".

Jungbu (literally "central part") Express Motorway starts in and passes through Sangil-dong, which is located in the east end of this district.

In Amsa-dong, there is a pre-historic heritage site, which is about six thousand years old.

The pottery which has been found was made of ceramic and is circular and shaped into a point similar to corn.