This article lists international organizations of which Ukraine is a member or an observer.

Name of the organizationUkraine's accessionStatusSourcesUnited NationsOctober 24, 1945Ukrainian and Byelorussian Soviet Socialist Republics were founding members of the UN along with the Soviet Union as a whole.United Nations Economic Commission for EuropeMarch 28, 1947World Trade OrganizationMay 16, 2008 European Bank for Reconstruction and DevelopmentApril 13, 1992International Monetary FundSeptember 3, 1992WorldBankGroupInternational Bank for Reconstruction and DevelopmentSeptember 3, 1992International Finance Corporation1993Multilateral Investment Guarantee Agency1994International Centre for Settlement of Investment DisputesJuly 7, 2000 International Development AssociationMay 27, 2004Organization for Security and Co-operation in EuropeJanuary 1, 1995OSCE's predecessor was the Conference on Security and Co-operation in Europe, which Ukraine joined on January 30, 1992.NATO Partnership for PeaceFebruary 8, 1994Euro-Atlantic Partnership CouncilMay 29, 1997EAPC's predecessor was the North Atlantic Cooperation Council, which Ukraine joined on March 10, 1992.Council of EuropeNovember 9, 1995Energy CommunityFebruary 1, 2011memberBaku InitiativeNovember 13, 2004Central European InitiativeMay 31, 1996Commonwealth of Independent StatesDecember 8, 1991Ukraine is a founding member of the CIS but did not ratify the CIS Charter, so it is not a full member.GUAM Organization for Democracy and Economic DevelopmentOctober 10, 1997 Black Sea Trade and Development Bank1998Organization of the Black Sea Economic CooperationMay 1, 1999Black Sea Naval Co-operation Task GroupApril 2, 2001Common Economic SpaceSeptember 19, 2003Community of Democratic ChoiceDecember 2, 2005Black Sea Forum for Partnership and DialogueJune 5, 2006Organization of Central Asian CooperationobserverEurasian Economic CommunityMay 2002observerStability Pact for South Eastern EuropeOn February 27, 2008, the Stability Pact was replaced by the Regional Co-operation Council. Ukraine is neither a member nor an observer in the RCC.observerSoutheast European Cooperative InitiativeobserverCouncil of the Baltic Sea StatesobserverFrancophonieSeptember 29, 2006observer Non-Aligned Movementobserver

Possible membership Ukraine is also a potential candidate for the following organizations: CEFTA (Central European Free Trade Agreement) see: Ukraine, Croatia broaden ties European Union see: Accession of Ukraine to the European Union, European Union Association Agreement, Stabilisation and Association Process, European Neighbourhood Policy, Eastern Partnership, Ukraine–European Union relations, Future enlargement of the European Union NATO. see: Ukraine–NATO relations, Enlargement of NATO, Partnership for Peace, Lithuanian–Polish–Ukrainian Brigade

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