Ilsanseo District

Ilsanseo District (Korean: 일산서구; lit.'West Ilsan District') is a district in Goyang, Gyeonggi-do, South Korea. Ilsan-gu was divided into Ilsandong District and Ilsanseo District on May 16, 2005.

It is a district located in the western part of Goyang-si, Gyeonggi-do. It has an area of 42.15 km and is divided into Ilsandong-gu to the east and Ilsanseo-gu to the west, centered on Gobong-ro, which connects Jungsan and Hosu Park. It borders Paju-si to the north and Gimpo-si to the west across the Han River.