Ust-Kubinsky District (Russian: Усть-Ку́бинский райо́н) is an administrative and municipal district (raion), one of the twenty-six in Vologda Oblast, Russia. It is located in the center of the oblast and borders with Vozhegodsky District in the north, Kharovsky District in the northeast, Sokolsky District in the southeast, Vologodsky District in the southwest, and with Kirillovsky District in the west. The area of the district is 2,400 square kilometers (930 sq mi). Its administrative center is the rural locality (a selo) of Ustye. District's population: 8,094 (2010 Census); 9,350 (2002 Census); 11,280 (1989 Census). The population of Ustye accounts for 48.7% of the district's population.