Penovsky District is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the northwest of the oblast and borders with Ostashkovsky District in the north, Selizharovsky District in the east, Andreapolsky District in the south, and with Maryovsky District of Novgorod Oblast in the west. The area of the district is . Its administrative center is the urban locality (an urban-type settlement) of Peno. Population: 6,864 (2010 Census); The population of Peno accounts for 61.5% of the district's total population.