Polessk (Russian: Полесск; German: Labiau; Lithuanian: Labguva; Polish: Labiawa) is a town and the administrative center of Polessky District in Kaliningrad Oblast, Russia, located 49 kilometers (30 mi) northeast of Kaliningrad, the administrative center of the oblast, at the junction of a main road and a railroad at the Deyma River, shortly before it enters the Curonian Lagoon.

In 1454, King Casimir IV Jagiellon incorporated the region to the Kingdom of Poland upon the request of the anti-Teutonic Prussian Confederation.

[9] After the subsequent Thirteen Years' War (1454–1466) the settlement became a part of Poland as a fief held by the Teutonic Knights[10] until 1525 and by Ducal Prussia afterwards.

After Germany's defeat in the war in 1945, the town was transferred to Soviet Russia and the following year it was renamed Polessk.

[2] The German inhabitants were partly evacuated via the coast, or were subsequently expelled in accordance with the Potsdam Agreement and replaced with Soviet citizens.