Polessky District (Russian: Поле́сский райо́н) is an administrative district (raion), one of the fifteen in Kaliningrad Oblast, Russia. As a municipal division, it is incorporated as Polessky Municipal District. It is located in the center of the oblast. The area of the district is 833 square kilometers (322 sq mi). Its administrative center is the town of Polessk. Population: 19,205 (2010 Census); 19,018 (2002 Census); 16,911 (1989 Census).