Siheung is a city in Gyeonggi Province, South Korea. The city has a population of 511,807 people, where 508,646 are residents out of 218,846 households as of August 2021. Siheung acquired its current administrative structure on January 1, 1989, the former Siheung County was divided into the cities of Siheung, Gunpo, and Uiwang. At the time, Siheung had a population of only 93,000. This number more than tripled in the following decade as massive suburban apartment complexes were developed. Siheung's current area formerly belonged to Incheon and Ansan before 1914.