Sosnovsky District () is an administrative and municipal district (raion), one of the twenty-three in Tambov Oblast, Russia. It is located in the north of the oblast. The district borders with Morshansky District in the north, Pichayevsky District in the east, Tambovsky District in the south, and with Staroyuryevsky District in the west. The area of the district is . Its administrative center is the urban locality (a work settlement) of Sosnovka. Population: 31,641 (2010 Census); The population of Sosnovka accounts for 29.0% of the district's total population.