Northern Krai
On July 15, 1929, several governorates, including Vologda Governorate, were merged into Northern Krai, and the uyezds were abolished. Instead, Gryazovetsky District with the administrative center in the town of Gryazovets was established as a part of Vologda Okrug. In the following years, the first-level administrative division of Russia kept changing. In 1936, Northern Krai was transformed into Northern Oblast. In 1937, Northern Oblast was split into Arkhangelsk Oblast and Vologda Oblast. Gryazovetsky District remained in Vologda Oblast ever since.