Per a census conducted at the end of the
Edo period, the area of Usui district contained 33 villages under the control of
Annaka Domain, nine villages under
Takasaki Domain, four villages under
Yoshii Domain and 29 villages administered as
tenryō directly by the
Tokugawa shogunate. Usui District was established on December 7, 1878, and with the establishment of the municipality system on April 1, 1889 the area was organized into five towns (Annaka, Haraichi, Sakamoto, Matsuida and Itahana) and 13 villages • 1890, March 1 – Usui village was raised to town status • 1936, July 1 – Isobe village was raised to town status • 1954, May 3 – Usui and Sakamoto towns and Nishiyokono, Sukumo, and Hosono villages were merged into Matsuida. • 1955, January 20 – Toyooka and Yawata villages are annexed by the city of Takasaki • 1955, February 1 – Satomi village merges with Murota village in Gunma District to form the town of Haruna; Ubuchi village merges with Kurata village in Gunma District to form Kurabuchi village • 1955, March 1 – Annaka town annexes the towns of Haraichi, Isobe, and Itahana, and villages of Higashiyokono, Iwanoya, Akima and Gokan • 1958, November 1 – Annaka was raised to city status • 2006, March 16 – Matsuida town was annexed by Annaka city, dissolving Usui District.