Velikiye Luki Oblast
Another district established on June 1, 1936 was Ploskoshsky District with the administrative center located in the selo of Ploskosh was established. The district was a part of Kalinin Oblast. On August 23, 1944 it was transferred to Velikiye Luki Oblast, and on October 2, 1957 it was transferred back to Pskov Oblast. On July 29, 1958 the district was transferred from Pskov to Kalinin oblast. On January 12, 1960 Ploskoshsky District was abolished and merged Toropetsky District.