The Šešupė (; ; ; ) is a 298 km long

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

Statistical Yearbook of Lithuania 2014
p. 12 that flows through

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...

(27 km),

Lithuania Lithuania (; lt, Lietuva ), officially the Republic of Lithuania ( lt, Lietuvos Respublika, links=no ), is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea. Lithuania ...

(158 km), and

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

(62 km). The river flows for 51 km along the border between the

Kaliningrad Oblast Kaliningrad Oblast (russian: Калинингра́дская о́бласть, translit=Kaliningradskaya oblast') is the westernmost federal subject of Russia. It is a semi-exclave situated on the Baltic Sea. The largest city and administr ...

, an

exclave An enclave is a territory (or a small territory apart of a larger one) that is entirely surrounded by the territory of one other state or entity. Enclaves may also exist within territorial waters. ''Enclave'' is sometimes used improperly to deno ...

of Russia, and

. The Šešupė originates near the Polish town of

Szeszupka Szeszupka is a village in the administrative district of Gmina Jeleniewo, within Suwałki County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately north-west of Jeleniewo, north of Suwałki, and north of the regional capita ...

, about 10 miles from the Polish-Lithuanian border, and flows into the

Nemunas The Neman, Nioman, Nemunas or MemelTo bankside nations of the present: Lithuanian: be, Нёман, , ; russian: Неман, ''Neman''; past: ger, Memel (where touching Prussia only, otherwise Nieman); lv, Nemuna; et, Neemen; pl, Niemen; ...

near the town of

Neman The Neman, Nioman, Nemunas or MemelTo bankside nations of the present: Lithuanian: be, Нёман, , ; russian: Неман, ''Neman''; past: ger, Memel (where touching Prussia only, otherwise Nieman); lv, Nemuna; et, Neemen; pl, Niemen; ...

on the border between Lithuania and Kaliningrad Oblast. 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. Šešupė1

References

Rivers of Lithuania Rivers of Poland Rivers of Podlaskie Voivodeship Rivers of Kaliningrad Oblast International rivers of Europe Lithuania–Russia border {{Lithuania-river-stub