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The Šešupė (About this soundpronunciation ; Russian: Шешупе; German: Scheschup(p)e; Polish: Szeszupa) is a 298 km long river[1] that flows through Poland (27 km), Lithuania (158 km), and Russia (62 km). The river flows for 51 km along the border between the Kaliningrad Oblast, an exclave of Russia, and Lithuania. The Šešupė originates near the Polish town of Szeszupka, about 10 miles from the Polish-Lithuanian border, and flows into the Nemunas near the town of Neman on the border between Lithuania and Kaliningrad Oblast.

Šešupė (Lithuania).png
Map of the Šešupė river
CountryLithuania, Poland, Russia
Physical characteristics
 ⁃ location18 km north of Suwałki
 ⁃ location
Neman near Neman town
 ⁃ coordinates
55°03′15″N 22°12′01″E / 55.05417°N 22.20028°E / 55.05417; 22.20028Coordinates: 55°03′15″N 22°12′01″E / 55.05417°N 22.20028°E / 55.05417; 22.20028
Length298 km (185 mi)
Basin size6,105 km2 (2,357 sq mi)
 ⁃ average18 m3/s (640 cu ft/s) (near Kudirkos Naumiestis)
Basin features
ProgressionNemanBaltic Sea

Major towns and cities along the river, from the Nemunas to the source, are: Kudirkos Naumiestis, Pilviškiai, Marijampolė and Kalvarija.

There are parts of Kaliningrad and Lithuania that are on the opposite side of the river, including a small island that is mostly Russian but has an area belonging to Lithuania.

It is the fourth-longest river in Lithuania.[1]

The Šešupė river near Pilviškiai