March 1947, the French authorities Hai Duong city divided into two districts, and then some time to go into town.
March 19, 2008, the city annexed the Nam Dong Commune, An Chau, Patriots, Thuong Dat (South Books), 38 hectares of the town of Lai Cach (Cam Giang), Tan Hung commune, Thach Khoi ( Gia Loc) and part Ngoc Lac village, Ngoc Son (Tu Ky); Tu Minh moved 2 Vietnam Hoa communes in 2 wards respectively named [12]. Thus, after the adjustment of administrative boundaries, the city has 19 wards and communes (13 wards and 6 communes).
May 17, 2009, the city has decided to become a grade-2 [13]. To September 23, 2009, the Government issued a resolution on the adjustment of administrative boundaries and the establishment of ward ward Nhi Chau (separated from Ngoc Chau) and Tan Binh (separated from Thanh Binh Ward) of Hai Duong [14].
December 29, 2013, the Government issued a resolution on the establishment of Thach Khoi Ward Patriots and on the basis of the respective commune called [2]
The city is planning to become urban type 1 2020