Primorsky District
In 1929, several governorates were merged into Northern Krai. On July 15, 1929, the uyezds were abolished, and Primorsky District was established. It became a part of Arkhangelsk Okrug of Northern Krai. In the following years, the first-level administrative division of Russia kept changing. In 1930, the okrug was abolished, and the district was subordinated to the central administration of Northern Krai. In 1936, the krai was transformed into Northern Oblast. In 1937, Northern Oblast itself was split into Arkhangelsk Oblast and Vologda Oblast. Primorsky District remained in Arkhangelsk Oblast ever since. The location of the administrative center of the district was moved several times until Arkhangelsk finally became the center.