Plesetsk is an urban locality and the administrative center of Plesetsky District, Arkhangelsk Oblast, Russia, situated about 800 kilometers (500 mi) northeast of Moscow and 180 kilometers (110 mi) south of Arkhangelsk. Municipally, it is the administrative center of Plesetskoye Urban Settlement, one of eight urban settlements in the district. Population: 11,037 (2010 Russian census); 11,300 (2002 Census); 14,027 (1989 Soviet census).

Plesetsky District is an administrative district (raion) one of the twenty-one in Arkhangelsk Oblast, Russia. As a municipal division, it is incorporated as Plesetsky Municipal District. It is located in the west of the oblast and borders with Primorsky District in the north, Kholmogorsky District in the northeast, the territories of the town of oblast significance of Mirny and Vinogradovsky District in the east, Shenkursky District in the southeast, Nyandomsky and Kargopolsky Districts in the south, Pudozhsky District of the Republic of Karelia in the west, and with Onezhsky District in the northwest. The area of the district is 27,500 square kilometers (10,600 sq mi). Its administrative center is the urban locality of Plesetsk. Population: 49,077 (2010 Russian census); 58,257 (2002 Census); 83,357 (1989 Soviet census). The population of Plesetsk accounts for 22.5% of the district's total population.