Slavsk (Russian:Славск), prior to 1946 known by its German name Heinrichswalde (Polish:Jędrzychowo; Lithuanian:Gastos), is a town and the administrative center of Slavsky District in Kaliningrad Oblast, Russia, located 105 kilometers (65mi) northeast of Kaliningrad, the administrative center of the oblast. Population: 4,614(2010 Census);5,172(2002 Census);4,682(**** Census).