United Shilla Dynasty
- 475 (Goguryeo Dynasty): Yulmok-gun
- 757 (United Shilla Dynasty): Yuljin-gun
- 940 (Goryeo Dynasty): Gwaju-gun
- 940 (Goryeo Dynasty): Gwaju-gun
- 1413 (Joseon Dynasty): Gwacheon-hyeon
- May 1895: Nam-myeon, Gwacheon-gun
- March 1, 1914 : Nam-myeon, Siheung-gun
- May 1, 1979 : Gunpo-eup, Siheung-gun
- January 1, 1989 : Promotion to Gunpo City
- December 26, 1994 : Incorporation of 4 ris in Banwol-myeon, Hwaseong-gun (Dundae, Sokdal, Daeyami, Domagyo
Gunpo City proceeded without any changes in its administrative districts or designation through the rule of Japanese Imperialism and even after the establishment of the nation since it became Nam-myeon, Siheung-gun on March 1, 1914 , but was promoted to Gunpo-eup, Siheung-gun on May 1, 1979 according to the Presidential Decree No. 9409 promulgated on April 7 of the same year.
Thereafter, the government separated Siheung-gun and promoted Gunpo-eup to Gunpo City on January 1, 1989 based on the Law No. 4050 (promulgated on December 31, 1988 ) for efficient regional management as the demand for administration increased day by day.
In addition, Gunpo City exercised its jurisdiction over five dongs, including Dang-dong, Dangjeong-dong, Bugok-dong, Sanbon-dong and Geumjeong-dong, in accordance with the Municipal Ordinance No. 22 on Designations of Dongs in Gunpo City and Its Jurisdiction (promulgated on January 1, 1989 ). Furthermore, as for subordinate offices, the city established 6 administrative dongs by designating Dang-dong 1-bu to Gunpo 1-dong, the combination of Dang-dong 1-bu and Bugok-dong to Gunpo 2-dong, Dangjong-dong to Dangjeong-dong, Sanbon-dong to Sanbon 1-dong and Sanbon 2-dong by dividing the dong an Geumjeong-dong to Geumjeong-dong according to the Municipal Ordinance No. 23 on Establishment of Administrative Dongs and Quota of Dong Chiefs in Gunpo City (promulgated on January 1, 1989).
Subsequently, Gunpo City established the administrative dong of Jaegung-dong by dividing Geumjeong-dong on May 1, 1992 in accordance with the Municipal Ordinance No. 281 (promulgated on April 28, 1992 ). This was done in order to efficiently deal with the increase in residents and administrative demand with the designation of parts of Sanbon-dong and Geumjeong-dong as the residential land development district and construction of houses in the said district due to construction of the new city . As the result, the administrative dongs amounted to a total of 7 dongs. Moreover, Gunpo City arrived at the present time as it moved the city hall building from Dang-dong to the present site at 844 Geumjeong-dong on December 2, 1992 in accordance with the Municipal Ordinance No. 295 (promulgated on January 6, 1993 ).
Since then, Ogeum-dong was newly established on January 14, 1993 by dividing Jaegung-dong according to the Municipal Ordnance No. 298 (promulgated on January 14, 1993), increasing the number of administrative dongs to 8.
Suri-dong was newly established on June 8, 1993 by dividing Sanbon 2-dong according to the Municipal Ordinance No. 308 (promulgated on June 8, 1993 ), making the number of administrative dongs to 9.
Consequently, the number of administrative dongs became 10 as Gungnae-dong was newly established one year later on July 19, 1994 by dividing Suri-dong based on the Municipal Ordinance No. 347 (promulgated on July 19, 1994 ).
There had not been any changes to the legal dongs in Gunpo City since Gunpo was promoted to the city, but the number of legal dongs was increased by 4 dongs in Gunpo City, including Dundae-dong, Sokdal-dong, Daeyami-dong and Domagyo-dong, based on the Municipal Ordinance No. 363 (promulgated on December 29, 1994), making the total number of dongs to 9 as 4 ris in Banwol-myeon, Hwaseong-gun, including Dundae-ri, Sokdal-ri, Daeyami-ri and Domagyo-ri, were incorporated into Gunpo City due to partial adjustment of administrative districts in accordance with the Presidential Decree No. 14,434 (promulgated on December 26, 1994). Furthermore, Daeyami-dong was established as the administrative dong to implement administration of 4 dongs based on the Municipal Ordinance No. 364 (promulgated on December 29, 1994), and the administrative dongs were increased to 11 as the result.
Subsequently, Gwangjeong-dong was newly established by dividing Sanbon 2-dong, which had difficulties in performing dong administration due to the increase in residents, on February 28, 1995 in accordance with the Municipal Ordinance 381 (promulgated on February 28, 1995 ). Moreover, Gunpo City has reached the present time with 11 administrative dongs now as Dangjeong-dong was integrated into Gunpo 1-dong in 1999.