Most of the Gimpo Peninsula consists of plains with the exception of the northwest in Tongjin Eup and Daegot Myeon with low hills. The eastern part is a part of a plain named Gimpo Plains with the part across the Han River, containing part of low land in Goyang City and Paju City.
In the period of Joseon Dynasty, the Gimpo Peninsula was occupied by Tongjin County and Gimpo County (including current Geomdan Dong). In 1914, under the rearrangement of administrative division by the Japanese Empire, the two counties were merged with Yangcheon County (currently most of Yangcheon District and Gangseo DistrictofSeoul Special City) and became new Gimpo County. In 1963, part of former Yangcheon county was absorbed into Seoul but Gimpo county merges Gyeyang Myeon, formerly the district of Bucheon County. In 1989 Gyeyang Myeon was absorbed into Incheon Metropolitan City, followed by the absorption of Geomdan Myeon into Incheon in 1995.
It is sometimes referred to as Gimpo Island after the construction of Ara Canal, separating the Peninsula with Gyeonggi Province,[1] but it is not an official name in Korea.
