Selizharovsky District (Russian: Селижа́ровский райо́н) is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the western central part of the oblast and borders with Ostashkovsky District in the north, Kuvshinovsky District in the northeast, Staritsky District in the east, Rzhevsky District in the southeast, Oleninsky District in the south, Nelidovsky District in the southwest, Andreapolsky District in the west, and with Penovsky District in the northwest. The area of the district is 3,098 square kilometers (1,196 sq mi). Its administrative center is the urban locality (an urban-type settlement) of Selizharovo. Population: 12,722 (2010 Census); 15,125 (2002 Census); 18,092 (1989 Census). The population of Selizharovo accounts for 52.9% of the district's total population.