Gangseo District (Korean: 강서구; RR: Gangseo-gu) is a gu on the west side of Nakdong River in Busan, South Korea.

Gangseo-gu was part of Buk-gu from its creation in 1978 to 1989 when it became an independent gu.

Gangseo-gu is the westernmost gu in Busan and it shares a common borders with Gimhae on its north-west side and Jinhae District, Changwon on its south-west side.

Gimhae International Airport, Heungguk Temple, Myeongwol Temple, as well as the Eulsukdo bird sanctuary are located in Gangseo-gu.

This South Korea location article is a stub.