Boksitogorsky District
On August 1, 1927, the uyezds were abolished, Yefimovsky District with the center in the settlement of Yefimovsky was established as part of Cherepovets Okrug of Leningrad Oblast. On July 23, 1930 the okrugs were abolished as well, and the district became directly subordinate to the oblast. On February 1, 1963 the district was abolished, and, after a short period, was merged into Boksitogorsky District.