Andreapolsky District is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the Valdai Hills in the west of the oblast and borders with Maryovsky District of Novgorod Oblast in the north, Penovsky District in the northeast, Selizharovsky District in the east, Nelidovsky District in the south, Zapadnodvinsky District in the southwest, Toropetsky District in the west, and with Kholmsky District of Novgorod Oblast in the northwest. The area of the district is . Its administrative center is the town of Andreapol. Population: 13,756 (2010 Census); The population of Andreapol accounts for 60.2% of the district's total population.