Nikolsky District (Russian: Нико́льский райо́н) is an administrative and municipal district (raion), one of the twenty-six in Vologda Oblast, Russia. It is located in the southeast of the oblast and borders with Kichmengsko-Gorodetsky District in the north, Vokhomsky District of Kostroma Oblast in the east, Pavinsky, Pyshchugsky, Mezhevskoy, and Kologrivsky Districts of Kostroma Oblast in the south, Babushkinsky District in the southwest, and with Nyuksensky District in the west. The area of the district is 7,476 square kilometers (2,886 sq mi). Its administrative center is the town of Nikolsk. Population: 22,414 (2010 Census); 26,461 (2002 Census); 31,437 (1989 Census). The population of Nikolsk accounts for 38.0% of the district's total population.