Zapadnodvinsky District is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the west of the oblast and borders with Toropetsky District in the north, Andreapolsky District in the northeast, Nelidovsky District in the east, Zharkovsky District in the southeast, Velizhsky District of Smolensk Oblast in the south, and with Kunyinsky District of Pskov Oblast in the west. The area of the district is . Its administrative center is the town of Zapadnaya Dvina. Population: 16,018 (2010 Census); The population of Zapadnaya Dvina accounts for 58.6% of the district's total population.