Lithuania (in Lithuanian, Lietuva), officially Republic of Lithuania, republic in north-eastern Europe, bounded on the north by Latvia; on the east and south by Belarus; on the south-east by Poland and the Kaliningrad oblast, Russia; and on the west by the Baltic Sea. With Latvia and Estonia, Lithuania is one of the Baltic republics. Lithuania has an area of about 65,200 sq km (25,175 sq mi). Vilnius, the capital and largest city of Lithuania, is in the south-eastern part of the nation.