International organization membership of the United States

Memberships

• Agreement between the United States of America, the United Mexican States, and Canada (USMCA)
• Antarctic Treaty System (ATS)
• Asian Development Bank (ADB) (nonregional member)
• Asia-Pacific Economic Cooperation (APEC)
• Association of Southeast Asian Nations (ASEAN) (dialogue partner)
• Australia Group
• Australia-New Zealand-United States Security Treaty (ANZUS)
• Bank for International Settlements (BIS)
• Black Sea Economic Cooperation Zone (BSEC) (observer)
• Board of Peace
• C5+1
• Council of Europe (CE) (observer)
• Council of the Baltic Sea States (CBSS) (observer)
• Dominican Republic–Central America Free Trade Agreement (CAFTA-DR)
• Euro-Atlantic Partnership Council (EAPC)
• European Bank for Reconstruction and Development (EBRD)
• European Organization for Nuclear Research (CERN) (observer)
• 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 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 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)
• Organization of American States (OAS)
• Pacific Community (SPC)
• Pacific Islands Forum (PIF) (partner)
• Paris Club
• Permanent Court of Arbitration (PCA)
• South Asian Association for Regional Cooperation (SAARC) (observer)
• Southeast European Cooperative Initiative (SECI) (observer)
• 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)
  • Organisation for the Prohibition of Chemical Weapons (OPCW)
  • Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO Preparatory Commission)
  • United Nations Children's Fund (UNICEF)
  • United Nations Conference on Trade and Development (UNCTAD)
  • United Nations Educational, Scientific and Cultural Organization (UNESCO)
  • 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)

Currently withdrawing

• Paris Agreement (Paris Climate Accords)
• United Nations Human Rights Council (UNHRC)
• United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA) As per presidential memorandum signed on 7 January 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:
  • 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

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.
• World Health Organization (WHO)

References

References

1. (July 7, 2009). "United States". [[United States]] [[Central Intelligence Agency]].
2. (2026-01-07). "Withdrawing the United States from International Organizations, Conventions, and Treaties that Are Contrary to the Interests of the United States".