The following is a list of international organizations in which the United States of America officially participates.
Memberships Agreement between the United States of America, the United Mexican States, and Canada (USMCA) African Development Bank (AfDB) Antarctic Treaty System (ATS) Asian Development Bank (ADB) (nonregional member) Asia-Pacific Economic Cooperation (APEC) Australia Group Australia-New Zealand-United States Security Treaty (ANZUS) Bank for International Settlements (BIS) Board of Peace C5+1 Conference on Disarmament (CD) Dominican Republic–Central America Free Trade Agreement (CAFTA-DR) Euro-Atlantic Partnership Council (EAPC) European Bank for Reconstruction and Development (EBRD) Fédération Internationale de Football Association (FIFA) Group of Seven (G7) Group of Ten (G10) Group of Twenty Finance Ministers and Central Bank Governors (G20) Inter-American Development Bank (IADB) International Boundary and Water Commission (IBWC) International Boundary Commission International Chamber of Commerce (ICC) International Criminal Police Organization (Interpol) International Energy Agency (IEA) International Federation of Red Cross and Red Crescent Societies (IFRCS) International Grains Council (IGC) International Hydrographic Organization (IHO) International Joint Commission International Mobile Satellite Organization (IMSO) International Olympic Committee (IOC) International Organization for Standardization (ISO) International Red Cross and Red Crescent Movement (ICRM) International Telecommunications Satellite Organization (ITSO) International Trade Union Confederation (ITUC) North Atlantic Treaty Organization (NATO) Nuclear Energy Agency (NEA) Nuclear Suppliers Group (NSG) Organisation for Economic Co-operation and Development (OECD) Organization for Security and Cooperation in Europe (OSCE) Organisation for the Prohibition of Chemical Weapons (OPCW) Organization of American States (OAS) Pacific Community (SPC) Paris Club Permanent Court of Arbitration (PCA) Quadrilateral Security Dialogue (Quad) Shield of the Americas United Nations (UN) - Membership in the UN includes participation in the UN's Six Principal Organs: the General Assembly, Secretariat, International Court of Justice, Security Council, Economic and Social Council, and Trusteeship Council. United Nations System Food and Agriculture Organization (FAO) International Atomic Energy Agency (IAEA) International Civil Aviation Organization (ICAO) International Fund for Agricultural Development (IFAD) International Labour Organization (ILO) International Maritime Organization (IMO) International Monetary Fund (IMF) International Organization for Migration (IOM) International Telecommunication Union (ITU) Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO Preparatory Commission) United Nations Children's Fund (UNICEF) United Nations Committee on the Peaceful Uses of Outer Space (COPUOS) United Nations Conference on Trade and Development (UNCTAD) United Nations High Commissioner for Refugees (UNHCR) United Nations Mission for Justice Support in Haiti (INUJUSTH) United Nations Truce Supervision Organization (UNTSO) Universal Postal Union (UPU) World Bank Group (WBG) International Bank for Reconstruction and Development (IBRD) International Centre for Settlement of Investment Disputes (ICSID) International Development Association (IDA) International Finance Corporation (IFC) Multilateral Investment Guarantee Agency (MIGA) World Food Programme (WFP) World Intellectual Property Organization (WIPO) World Meteorological Organization (WMO) World Trade Organization (WTO) World Customs Organization (WCO) World Organization of the Scout Movement (WOSM) World Veterans Federation (WVF) Zangger Committee (ZC)
Observer status Association of Southeast Asian Nations (ASEAN) (dialogue partner) Black Sea Economic Cooperation Zone (BSEC) (observer) Council of Europe (CE) (observer) Council of the Baltic Sea States (CBSS) (observer) European Organization for Nuclear Research (CERN) (observer) Pacific Islands Forum (PIF) (dialogue partner) South Asian Association for Regional Cooperation (SAARC) (observer) Southeast European Cooperative Initiative (SECI) (observer)
Currently withdrawing United Nations Educational, Scientific and Cultural Organization (UNESCO) - full withdrawal effective December 31, 2026 United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA) Group of States against Corruption (GRECO) - full withdrawal effective December 31 2026 As per presidential memorandum signed on January 7, 2026: Non-United Nations Organizations: 24/7 Carbon-Free Energy Compact Colombo Plan Council Commission for Environmental Cooperation Education Cannot Wait European Centre of Excellence for Countering Hybrid Threats Forum of European National Highway Research Laboratories Freedom Online Coalition Global Community Engagement and Resilience Fund Global Counterterrorism Forum Global Forum on Cyber Expertise Global Forum on Migration and Development Inter-American Institute for Global Change Research Intergovernmental Forum on Mining, Minerals, Metals, and Sustainable Development Intergovernmental Panel on Climate Change Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services International Centre for the Study of the Preservation and Restoration of Cultural Property International Cotton Advisory Committee International Development Law Organization International Energy Forum International Federation of Arts Councils and Culture Agencies International Institute for Democracy and Electoral Assistance International Institute for Justice and the Rule of Law International Lead and Zinc Study Group International Renewable Energy Agency International Solar Alliance International Tropical Timber Organization International Union for Conservation of Nature Pan American Institute of Geography and History Partnership for Atlantic Cooperation Regional Cooperation Agreement on Combating Piracy and Armed Robbery against Ships in Asia Regional Cooperation Council Renewable Energy Policy Network for the 21st Century Science and Technology Center in Ukraine Secretariat of the Pacific Regional Environment Programme Venice Commission of the Council of Europe United Nations (UN) Organizations: United Nations Department of Economic and Social Affairs United Nations Economic Commission for Africa United Nations Economic Commission for Latin America and the Caribbean United Nations Economic and Social Commission for Asia and the Pacific United Nations Economic and Social Commission for Western Asia International Law Commission International Residual Mechanism for Criminal Tribunals International Trade Centre Office of the Special Adviser on Africa Office of the Special Representative of the Secretary General for Children in Armed Conflict Office of the Special Representative of the Secretary-General on Sexual Violence in Conflict Office of the Special Representative of the Secretary-General on Violence Against Children Peacebuilding Commission Peacebuilding Fund Permanent Forum on People of African Descent UN Alliance of Civilizations UN Collaborative Programme on Reducing Emissions from Deforestation and Forest Degradation in Developing Countries UN Conference on Trade and Development UN Democracy Fund UN-Energy UN Entity for Gender Equality and the Empowerment of Women UN Framework Convention on Climate Change UN Human Settlements Programme UN Institute for Training and Research United Nations-Oceans UN Population Fund UN Register of Conventional Arms UN System Chief Executives Board for Coordination United Nations System Staff College UN-Water UN University
Withdrawn World Health Organization (WHO) - effective January 20, 2025 United Nations Human Rights Council (UNHRC) - effective February 4, 2025 Paris Agreement (Paris Climate Accords) - effective January 27, 2026
Notably absent International Criminal Court - Signed treaty, but did not ratify (December 31, 2000). Withdrew signature (May 6, 2002). See also United States and the International Criminal Court.
See also
United States Department of State Foreign policy of the United States Foreign relations of the United States United States and the United Nations United States Mission to the United Nations United States withdrawal from the United Nations International affairs budget of the United States List of the United States treaties List of treaties unsigned or unratified by the United States Free trade agreements of the United States
References
External links United States of America website United States Department of State