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 3,051 square kilometers (1,178 sq mi). Its administrative center is the town of Andreapol. Population: 13,756 ; 16,213 (2002 Census); 17,900 (1989 Soviet census). The population of Andreapol accounts for 60.2% of the district's total population.

Maryovsky District is an administrative and municipal district (raion), one of the twenty-one in Novgorod Oblast, Russia. It is located in the south of the oblast and borders with Demyansky District in the north, Ostashkovsky and Penovsky Districts of Tver Oblast in the southeast, Andreapolsky District of Tver Oblast and Kholmsky District in the southwest, Poddorsky District in the west, and with Starorussky District in the northwest. The area of the district is 1,800 square kilometers (690 sq mi). Its administrative center is the rural locality of Maryovo. District's population: 4,673 (2010 Russian census); 5,711 ; 6,835 (1989 Soviet census). The population of Maryovo accounts for 49.2% of the district's total population.