[3] During the Time of Troubles, the Polish Army laid a siege on Ustyuzhna, but did not manage to conquer the town.

[3] Between 1702 and 1714, Izhinsky iron-making plant, built by the Admiralty, existed in Ustyuzhna, making it a major producer of arms.

[11] In 1727, separate Novgorod Governorate was split off, which included Ustyuzhna as a part of its Belozersk Province.

[13] At the same time, uyezds were abolished and Ustyuzhensky District was established, with the administrative center in Ustyuzhna.

[13] On September 23, 1937, Ustyuzhensky District was transferred to newly established Vologda Oblast and remained there ever since.

[16] It is believed that the plot of The Government Inspector, a comedy by Russian playwright Nikolai Gogol, is based on the real story which took place in Ustyuzhna in the beginning of the 19th century.