The name of Ganghwa-gun has undergone changes over times:
It was called firstly Gapbigocha during ancient time, secondly Hyeolgu-gun in Goguryeo's Great King Gwanggaeto period, thirdly Haegu-gun in the reign of King Gyeongdeok in Silla kingdom, fourthly Ganghwa hyeon in the King Taejo of Goryeo dynasty, and fifthly it was changed to Ganghwa-gun in the King Gojong's reign of Joseon dynasty, and in March 1, 1995, it was incorporated into Incheon Metropolitan City.
As a sacred ground of the foundation of the country, it is the home of ideology of "Hongik Ingan" (Devotion for public welfare) of Dangun, the founding father of the first Korean kingdom.
Ganghwa has preserved many cultural relics as scattered around the island and developed the island for the multipurpose of historical education and beautification of environmental surroundings for sight-seeing visitors.
|AD 475||Renamed to Hyeolgu-gun, king Jangsu in Goguryeo dynasty|
|AD 757||Renamed to Haegu-gun, king Gyeongdeok in Silla dynasty|
|AD 844||Established Hyeongujin, king Munseon in Silla|
|AD 940||Renamed to Ganghwa-hyeon, king Taejo in Goryeo|
|AD 1232||Promoted to Ganghwa-gun, king Gojong in Goryeo|
|AD 1363||Promoted to Ganghwabu, king Gongmin in Goryeo|
|AD 1394||Established Ganghwa dohobu, king Taejo in Joseon|
|AD 1627||Promoted to Ganghwa yusubu, king Injo in Joseon|
|AD 1895||Renamed to Ganghwa-gun, king Gojong in Joseon|
|AD 1896||promoted to Ganghwabu, king Gojong in Joseon|
|AD 1906||Renmaed to Ganghwa-gun|
|AD 1914||Incorporated Gyodong-gun to Ganghwa-gun|
|AD 1962||Opened Boleumdo office|
|AD 1973||Promoted Ganghwa-myeon to Ganghwa-eup|
|AD 1995||Incorporated Ganghwa-gun into Incheon Metropolitan City|