Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Vyborgsky District (Russian: ) is a district (raion) of Leningrad Oblast, Russia, on Karelian Isthmus, established in 1940 when the territory had been ceded by Finland to the Soviet Union by Moscow Peace Treaty as a result of the Winter War. The area of the district is 7,350.9 km². Its administrative center is the town of Vyborg (which is administratively not a part of the district). District''s population: 113,748 (2002 Census); 108,571 (1989 Census).