| 1914.3.1 |
Anseong, Yangsung, and Jucksan combined into Anseong.
According to Ministerial order #111 (Declared in 1913.12.29) |
| 1963.1.1 |
Yongin-gun Gosam-myun assigned to Anseong-gun according to Law chapter 1175 (Declared in 1962.11.21) |
| 1983.2.15 |
according to Presidential decree No. 11027 (1983.01.10 Declared), Pyungtaek-eup, Pyungtaek-gun took over Yongiee-ri, Juckbaek-ri and Chungryong-ri of Wongok-Myun, and Sosa-ri, Gongdo-myun out of Anseong-gun. |
| 1987.1.1 |
according to presidential decree No. 12007호 (1986.12.23 Declared), part of Yangbok-ri became Gungwang-myun;
Nampung-ri, Dongpyung-ri, Gahun-ri of Samjuk-myung became part of Bogae-myun. |
| 1992.9.30 |
by Anseong-gun reference to the precedents No.1423 (1992.09.30 Declared), name of Leejuk-myun changed to Jucksan-myun |
| 1993.4.8 |
by Anseong-gun reference to the precedents No. 1443 (1993.04.08 Declared), part of Geunjee-ri and Sohyun-ri of Daeduk-myun were taken over to Anseong-eup. |
| 1997.6.6 |
by Anseong-gun reference to the precedents No. 1629 (1997.05.07 Declared), 2 of Gasa-ri & Gahun-ri from Bogae-myun and 3 of Mosan-ri, Gunjee-ri and Sohyun-ri of Daeduk-myun were taken over to Anseong-eup. |
| 1998.4.1 |
by law No. 5458 (1997.12.07 Declared), promoted to Anseong-si (city), became multi purpose city (urban and suburban)
Anseong-eup changed to 3 dongs (Anseong1-dong, Anseong2-dong, Anseong3-dong) |
| 2001.6.1 |
by Anseong-si reference to the precedents No. 333, (2001.05.29Declared), Gongdo-myun promoted to Gongdo-eup. |
