Ozyorsky District (Russian: Озёрский райо́н) is an administrative district (raion), one of the fifteen in Kaliningrad Oblast, Russia. It is located in the southeast of the oblast. The area of the district is 871 square kilometers (336 sq mi). Its administrative center is the town of Ozyorsk. Population: 15,316 (2010 Census); 17,239 (2002 Census); 16,089 (1989 Census).