Firovsky District is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the north of the oblast and borders with the urban-type settlement of Ozyorny in the north, Bologovsky District in the northeast, Vyshnevolotsky District in the east, Kuvshinovsky District in the south, Ostashkovsky District in the southwest, Demyansky District of Novgorod Oblast in the west, and with Valdaysky District, also of Novgorod Oblast, in the northwest. The area of the district is . Its administrative center is the urban locality (an urban-type settlement) of Firovo. Population: 9,396 (2010 Census); The population of Firovo accounts for 25.9% of the district's total population.