Valdaysky District is an administrative and municipal district (raion), one of the twenty-one in Novgorod Oblast, Russia. It is located in the southeast of the oblast and borders with Okulovsky District in the north, Bologovsky District of Tver Oblast in the east, the territory of the closed administrative-territorial formation of Ozyorny of Tver Oblast in the southeast, Firovsky District of Tver Oblast in the south, Demyansky District in the southwest, and with Krestetsky District in the northwest. The area of the district is . Its administrative center is the town of Valday. Population: 29,943 (2002 Census); The population of Valday accounts for 60.8% of the district's total population.