Siheung

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.

Oido () is an area in Siheung, Gyeonggi-do, South Korea. As its name suggests, it was previously an island, but land reclamation projects in the 20th century led to it eventually joining the mainland.

Jeongwang-dong is a dong situated in the city of Siheung, Gyeonggi-do, South Korea. The neighbourhood is divided into one main division; Jeongwang-dong (정왕동) and four subdivisions; Jeongwang 1-dong (정왕1동), Jeongwang 2-dong (정왕2동), Jeongwang 3-dong (정왕3동) and Jeongwang 4-dong (정왕4동). Together, these areas make up a total population of about 155,500 and an area of about 33 square kilometres.