Primorsky District
On May 16, 1940, Koivisto became the administrative center of the newly established Koyvistovsky District in Leningrad Oblast. At the same time, Koivisto was granted town status. On October 1, 1948, the town was renamed Primorsk and the district was renamed Primorsky. On April 3, 1954, Primorsky District was abolished and merged into Roshchinsky District, with the administrative center in Roshchino. On January 4, 1957, Primorsk was transferred to Vyborgsky District.