Ozyorsk is a town and the administrative center of Ozyorsky District in Kaliningrad Oblast, Russia, located on the Angrapa River near the bo…Ozyorsk is a town and the administrative center of Ozyorsky District in Kaliningrad Oblast, Russia, located on the Angrapa River near the border with the Polish Warmian-Masurian Voivodeship, 120 kilometers southeast of Kaliningrad, the administrative center of the oblast. Population: 4,740 ; 5,801 ; 6,219.