Lithuania, officially the Republic of Lithuania, is a country in northern Europe. The largest of the three Baltic States situated along the Baltic Sea, it shares borders with Latvia to the north, Belarus to the southeast, Poland and the Russian exclave of the Kaliningrad Oblast to the southwest. Lithuania has been a member state of the European Union since May 1, 2004.
Lithuania is situated in northern Europe and is the largest and most populous of the Baltic states. It has around 99 kilometres (61.5 mi) of sandy coastline, of which only about 38 kilometres (24 mi) face the open Baltic Sea; the rest of the coast is sheltered by the Curonian sand peninsula. Lithuania's major warm-water port, Klaipėda, lies at the narrow mouth of the Curonian Lagoon (Lithuanian: Kuršių marios), a shallow lagoon extending south to Kaliningrad. The main river, the Neman River, and some of its tributaries carry international shipping vessels.