The current name, Siheung, originates from the area around now Siheung-dong(province) in Geumcheon-gu, Seoul, which King Jangsu of Goguryeo Dynasty designated as Ingbeolno-hye on in the 63rd year of his reign(A.D. 475). But in terms of a territorial zone, its origin is Maesohol-hyeon and Janghanggu-hyeon, part of now Ansan and Incheon. Siheung City was designated on January 1, 1989, when Siheung-gun(county) was divided and promoted into three cities, Siheung, Gunpo, and Euiwang, respectively.  Then Sorae-eup, Suam-myeon, and Gunja-myeon were incorporated into Siheung, which initially consisted of 9 legal dongs(province s) and then 11 dongs(provinces) as Jungrim-dong(provinces) and Gwarim-dong(provinces) were later added in 1992.
As a center of south-western Metropolitan area in West Coast, Siheung is not only a garden city with comfortable residential districts but also a marine industrial city that perches at the center of Western Industrial Belt, which links Incheon l Airport and Pyeongtaek Harbor. Geographically speaking, Siheung is within the 30 kilometers radius of Seoul downtown area and Kimpo and Incheon l Airports.

Taking advantage of traffic networks formed by geographical conditions, such as Incheon l Airport and Harbor and a port slated to be newly established, Siheung will develop itself into a center of distribution markets. In addition, the city will transform itself into a high-tech, culture, leisure and tourist city through the development of huge land available.