Nyandomsky District (Russian: Ня́ндомский райо́н) is an administrative district (raion), one of the twenty-one in Arkhangelsk Oblast, Russia. As a municipal division, it is incorporated as Nyandomsky Municipal District. It is located in the southwest of the oblast and borders with Plesetsky District in the north and west, Shenkursky District in the east, Velsky District in the southeast, Konoshsky District in the south, and with Kargopolsky District in the southwest. The area of the district is 8,100 square kilometers (3,100 sq mi). Its administrative center is the town of Nyandoma. Population: 30,244 (2010 Census); 33,465 (2002 Census); 40,601 (1989 Census). The population of Nyandoma accounts for 73.9% of the district's total population.