Ilsan-gu is the name of two districts or wards (Ilsandong-gu, literally âÂÂEastern Ilsan districtâÂÂ, and Ilsanseo-gu, literally âÂÂWestern Ilsan districtâÂÂ) in Goyang, Gyeonggi-do, South Korea. Ilsan-gu was divided into Ilsandong-gu and Ilisanseo-gu on May 16, 2005.