Karelo-Finnish Soviet Socialist Republic
Vyborgsky District with the administrative center in Vyborg was established in March 1940 as a part of the Karelian Autonomous Soviet Socialist Republic (Karelian ASSR). On March 31, 1940, the Karelian ASSR was transformed into the Karelo-Finnish Soviet Socialist Republic. On November 24, 1944, Vyborgsky District was transferred from Karelo-Finnish Soviet Socialist Republic to Leningrad Oblast.