Северная область
In the following years, the district remained within the same borders, but the first-level administrative division of Russia kept changing. In 1929, Northern Dvina Governorate was merged into Northern Krai, which in 1936 was transformed into Northern Oblast. In 1937, Northern Oblast was split into Arkhangelsk Oblast and Vologda Oblast. Lensky District remained in Arkhangelsk Oblast ever since.