Sandovsky District is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the northeast of the oblast and borders with Ustyuzhensky District of Vologda Oblast in the north, Vesyegonsky District in the northeast, Molokovsky District in the southeast, Maksatikhinsky District in the south, Lesnoy District in the west, and with Pestovsky District of Novgorod Oblast in the northwest. The area of the district is . Its administrative center is the urban locality (an urban-type settlement) of Sandovo. Population: 6,811 (2010 Census); The population of Sandovo accounts for 51.5% of the district's total population.