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.

Demyansky 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 Krestetsky District in the north, Valdaysky District in the northeast, Firovsky District of Tver Oblast in the southeast, Ostashkovsky District of Tver Oblast in the south, Maryovsky District in the southwest, Starorussky District in the west, and with Parfinsky District in the northwest. The area of the district is 3,200 square kilometers (1,200 sq mi). Its administrative center is the urban locality of Demyansk. Population: 13,001 (2010 Russian census); 16,020 ; 18,488 (1989 Soviet census). The population of Demyansk accounts for 41.3% of the district's total population.