Островский район
On August 1, 1927, Palkinsky District was also established, with the administrative center in the "selo" of Palkino. It included parts of former Pskovsky and Ostrovsky Uyezds and was a part of Pskov Okrug of Leningrad Oblast. On September 20, 1931, Palkinsky District was abolished and merged into Ostrovsky District. On February 15, 1935, the district was re-established on the territory which formerly constituted parts of Pskovsky and Ostrovsky Districts.