Lithuania became a member of the United Nations on September 18, 1991, and is a signatory to a number of its organizations and other international agreements. It is also a member of the Organization for Security and Cooperation in Europe,NATO and its adjunct North Atlantic Coordinating Council, the Council of Europe, and the European Union. Lithuania gained membership in the World Trade Organization on May 31, 2001. It also seeks membership in the OECD and other Western organizations.
Lithuania maintains foreign diplomatic missions in 94 countries on six continents and consular posts in two countries that are not represented by an embassy. Lithuania's liberal "zero-option" citizenship law has substantially erased tensions with its neighbors. Lithuania's suspension of two strongly ethnic Polish district councils on charges of blocking reform or disloyalty during the August 1991 coup had cooled relations with Poland, but bilateral cooperation markedly increased with the holding of elections in those districts and the signing of a bilateral Friendship Treaty in 1994. Although a similar bilateral friendship agreement was signed with Belarus in 1995, Lithuania has joined the United States and other European nations in urging the Government of Belarus to adopt democratic and economic reforms.
Lithuania has established diplomatic relations with 176 countries.
Lithuania is in warm and good relations with Estonia. Latvia takes the 1st place on the list of Lithuanian investments abroad.
Diplomatic relations established: 1991-10-05
Lithuania concluded the treaty of friendship with Poland in April 1994. However, disagreements over Lithuania's implementation of the treaty have soured relations and cooperation on energy issues and Lithuania remains unconnected to the Polish electricity grid and the countries are not connected by a non-Russian-controlled gas pipeline, as previous promises to do both have been stalled by the row over the friendship treaty.
Lithuania is also an active member in the cooperation between Northern Europe countries. Lithuania is a member of Baltic Council, since its establishment in 1993. Baltic Council is a permanent organisation of international cooperation, located in Tallinn. It operates through the Baltic Assembly and Baltic Council of Ministers.