# List of intergovernmental organizations

The following is a list of the major existing intergovernmental organizations (IGOs).
For a more complete listing, see the Yearbook of International Organizations, which includes 25,000 international non-governmental organizations (INGOs), excluding for-profit enterprises, about 5,000 IGOs, and lists dormant and dead organizations as well as those in operation (figures as of the 400th edition, 2012/13). A 2020 academic dataset on international organizations included 561 intergovernmental organizations between 1815 and 2015; more than one-third of those IGOs ended up defunct.

## United Nations and agencies

The UN has six principal organs:
* The General Assembly (the main deliberative assembly);
* The Security Council (decides certain resolutions for peace and security);
* The Economic and Social Council (assists in promoting international economic and social cooperation and development);
* The Secretariat (provides studies, information, and facilities needed by the UN);
* The International Court of Justice (the primary judicial organ).
* The United Nations Trusteeship Council (inactive)
The UN also includes various Funds, Programmes and specialized agencies:
* Food and Agriculture Organization
* International Labour Organization
* International Civil Aviation Organization
* International Maritime Organization
* International Telecommunication Union
* Joint United Nations Programme on HIV/AIDS
* United Nations Capital Development Fund
* United Nations Human Rights Council (UNHRC)
* United Nations International Children's Emergency Fund (UNICEF)
* United Nations Development Programme
* United Nations Educational, Scientific and Cultural Organization (UNESCO)
* United Nations Environment Programme
* United Nations Human Settlements Programme
* United Nations Industrial Development Organization
* United Nations Office for Disaster Risk Reduction (UNISDR)
* United Nations Office on Drugs and Crime
* Universal Postal Union
* World Health Organization (WHO)
* World Intellectual Property Organization
* World Food Programme
* World Meteorological Organization
* UN Tourism
* The UN maintains various offices:
** United Nations Headquarters (New York City)
** United Nations Office at Geneva
** United Nations Office at Nairobi
** United Nations Office at Vienna
The UN also includes subsidiary organs:
* International Residual Mechanism for Criminal Tribunals
** International Criminal Tribunal for the former Yugoslavia (ICTY)
** International Criminal Tribunal for Rwanda (ICTR)

## Agricultural research organizations

* Africa Rice Center (West Africa Rice Development Association, WARDA)
* Bioversity International (International Plant Genetics Resources Institute, IPGRI)
* Center for International Forestry Research (CIFOR)
* International Center for Tropical Agriculture (CIAT)
* International Center for Agricultural Research in the Dry Areas (ICARDA)
* International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)
* International Food Policy Research Institute (IFPRI)
* International Institute of Tropical Agriculture (IITA)
* International Livestock Research Institute (ILRI)
* International Maize and Wheat Improvement Center (CIMMYT)
* International Potato Center (CIP)
* International Rice Research Institute (IRRI)
* International Water Management Institute (IWMI)
* World Agroforestry Centre (International Centre for Research in Agroforestry, ICRAF)
* WorldFish Center (International Center for Living Aquatic Resources Management, ICLARM)
* World Vegetable Center
* CGIAR
* CAB International (Centre for Agriculture and Bioscience International, CABI)

## Fisheries organizations

* Asia-Pacific Fishery Commission (APFIC)
* Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR)
* Great Lakes Fishery Commission (GLFC)
* Indian Ocean Tuna Commission (IOTC)
* Inter-American Tropical Tuna Commission (IATTC)
* International Commission for the Conservation of Atlantic Tunas (ICCAT)
* International Pacific Halibut Commission (IPHC)
* International Whaling Commission (IWC)
* North-East Atlantic Fisheries Commission (NEAFC)
* Northwest Atlantic Fisheries Organization (NAFO)
* North Atlantic Salmon Conservation Organization (NASCO)
* Pacific Salmon Commission (PSC)
* Southeast Asian Fisheries Development Center (SEAFDEC)
* Western and Central Pacific Fisheries Commission (WCPFC)

## Maritime organizations

* Antarctic Treaty Secretariat (ATS)
* International Hydrographic Organization
* International Maritime Organization
* International Seabed Authority
* International Council for the Exploration of the Sea (ICES)
* Mediterranean Science Commission (CIESM)
* North Pacific Marine Science Organization (PICES)

## Financial, trade, and customs organizations

* Alliance for Financial Inclusion (AFI)
* African Development Bank
* Asian Development Bank
* Asian Infrastructure Investment Bank
* Bank for International Settlements
* Black Sea Trade and Development Bank (BSTDB)
* Caribbean Development Bank (CDB)
* Council of Europe Development Bank (CEB)
* Eurasian Development Bank
* European Bank for Reconstruction and Development (EBRD)
* European Investment Bank (EIB)
* Federation of Euro-Asian Stock Exchanges
* Financial Action Task Force (FATF)
* Inter-American Development Bank
* Inter-American Investment Corporation (IDB Invest)
* International Bureau of Weights and Measures (BIPM)
* International Energy Agency (IEA)
* International Fund for Agricultural Development (IFAD)
* International Development Law Organization (IDLO), headquartered in Rome
* International Monetary Fund (IMF)
* Islamic Development Bank (IDB)
* Netherlands Development Finance Company (FMO)
* Nordic Development Fund (NDF)
* Nordic Investment Bank (NIB)
* New Development Bank (NDB)
* Organization for Economic and Co-operation Development (OECD)
* OPEC Fund for International Development (OPEC Fund)
* Organization of Petroleum-Exporting Countries (OPEC)
* West African Development Bank (BOAD)
* World Bank Group
** International Bank for Reconstruction and Development (IBRD)
** International Development Association (IDA)
** International Finance Corporation (IFC)
** Multilateral Investment Guarantee Agency (MIGA)
** International Centre for Settlement of Investment Disputes (ICSID)
* World Customs Organization (WCO)
* World Trade Organization (WTO)

## Regional organizations
### Europe

* European Union (EU)
** Western European Union (defunct)
* Big Four (Western Europe)
* Council of Europe (CoE)
* Central European Initiative (CEI)
* Eastern Partnership
* Energy Community
* European Defence Agency (EDA)
* European Free Trade Association (EFTA)
* European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT)
* European Patent Organisation (EPO)
* European Political Community (EPC)
* European Science Foundation
* European Organisation for the Safety of Air Navigation (EUROCONTROL)
* European Telecommunications Satellite Organization (EUTELSAT IGO)
* Group of 9 (G9)
* International Commission on Civil Status (ICCS)
* Central Commission for Navigation on the Rhine (CCNR)
* Council of the Baltic Sea States (CBSS)
* Assembly of European Regions (AER)
* Eiroforum
** European Organization for Nuclear Research (CERN)
** Danube Commission
** European Fusion Development Agreement (EFDA JET)
** European Molecular Biology Laboratory (EMBL)
** European Space Agency (ESA)
** European Southern Observatory (ESO)
** European Synchrotron Radiation Facility (ESRF)
** European x-ray free electron laser (European XFEL)
** Institut Laue–Langevin (ILL)
* Baltic Marine Environment Protection Commission
* Benelux
* Belgium–Luxembourg Economic Union
* British–Irish Council
* Craiova Group (C4)
* Nordic-Baltic Eight
* Nordic Council
* Nordic Investment Bank
* Northern Dimension Partnership in Public Health and Social Well-being (NDPHS)
* Organisation for Joint Armament Cooperation (OCCAR)
* Visegrád Group (V4)
* EUREKA
* European Cooperation in Science and Technology (COST)
* Community for Democracy and Rights of Nations (Commonwealth of Unrecognized States)
* European Centre for Medium-range Weather Forecasts (ECMWF)
* South-East European Cooperation Process
* West Nordic Council
* Three Seas Initiative

### Asia

* Asia Cooperation Dialogue (ACD)
* Asian Development Bank (ADB)
* Asia-Pacific Economic Cooperation (APEC)
* East Asia Summit (EAS)
* Association of Southeast Asian Nations (ASEAN)
* Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation (BIMSTEC)
* International Network for Bamboo and Rattan (INBAR)
* Mekong–Ganga Cooperation (MGC)
* Mekong River Commission (MRC)
* Partnerships in Environmental Management for the Seas of East Asia (PEMSEA)
* South Asian Association for Regional Cooperation (SAARC)
* Southeast Asian Ministers of Education Organization (SEAMEO)
* Trilateral Cooperation Secretariat (TCS)
* Gulf Cooperation Council (GCC)

### Transcontinental

* Group of Seven
* Eurasia
** Asia-Europe Foundation (ASEF)
** Central Asian Cooperation Organization
** Community for Democracy and Rights of Nations
** Collective Security Treaty Organization (CSTO)
** Conference on Interaction and Confidence Building Measures in Asia (CICA)
** Conference of the New Emerging Forces (CONEFO)
** Commonwealth of Independent States (CIS)
** Economic Cooperation Organization (ECO)
** Eurasian Economic Union (EEU or EAEU)
** GUAM Organization for Democracy and Economic Development
** Organization of the Black Sea Economic Cooperation (BSEC)
** Organization of Turkic States (OTS)
** Shanghai Cooperation Organisation (SCO)
** TRACECA
** Union State
* Trans-Atlantic
** Group of Seven
** Group of Ten (economics)
** North Atlantic Treaty Organization (NATO)
** Organization for Security and Co-operation in Europe (OSCE)
** South Atlantic Peace and Cooperation Zone (ZPCAS)
* Mediterranean
** Union for the Mediterranean
* Indian Ocean
** Indian Ocean Rim Association for Regional Cooperation (IOR-ARC)
** Indian Ocean Commission (COI)
* Arctic Ocean
** Arctic Council
* Pacific Ocean:
** ANZUS
** Asia-Pacific Economic Cooperation (APEC)
** Colombo Plan
** Group of Five
** Polynesian Leaders Group (PlG)
** Melanesian Spearhead Group (MSG)
** Pacific Islands Forum
** Pacific Islands Forum Fisheries Agency (PIFFA)
** Pacific Regional Environment Programme (SPREP)
** Secretariat of the Pacific Community
* African, Caribbean and Pacific Group of States
** Technical Centre for Agricultural and Rural Cooperation ACP-EU (CTA)
* Afro-Asian organizations
** Asian-African Legal Consultative Organization
** D-8 Organization for Economic Cooperation

### Africa

* African Organisation for Standardisation (ARSO)
* African Union
* Economic Community of Central African States (ECCAS)
* Conseil de l'Entente
* Economic Community of West African States (ECOWAS)
* East African Community (EAC)
* West African Economic and Monetary Union (UEMOA)
* Southern African Development Community (SADC)
* Intergovernmental Authority on Development (IGAD)
* Arab Maghreb Union
* International Conference on the Great Lakes Region (ICGLR)
* African Ministers Council on Water (AMCOW)

### Americas

* Organization of American States (OAS)
* Union of South American Nations (USAN)
   * Mercosur
   * Andean Community of Nations
* Forum for the Progress and Integration of South America (PROSUR)
* Caribbean Community (CARICOM)
* Association of Caribbean States (ACS)
* Organisation of Eastern Caribbean States (OECS)
* Central American Parliament
* Bolivarian Alliance for the Americas (ALBA)
* Rio Group
* System of Cooperation Among the American Air Forces (SICOFAA)
* Central American Bank for Economic Integration (CABEI)
* Central American Integration System
* Community of Latin American and Caribbean States (CELAC)
* Pacific Alliance

## Military alliances

* Australia, New Zealand, United States Security Treaty (ANZUS)
* AUKUS
* Collective Security Treaty Organization (CSTO)
* North Atlantic Treaty Organization (NATO)
* Inter-American Treaty of Reciprocal Assistance (Rio Pact)

## Cultural, ethnic, linguistic, and religious organizations

* Commonwealth of Nations
* International Association for Religious Freedom
* International Centre for the Study of the Preservation and Restoration of Cultural Property (ICCROM)
* Organisation internationale de la Francophonie
* Community of Portuguese Language Countries (CPLP)
* Organization of Ibero-American States (OEI)
* Arab League
* Organisation of Islamic Cooperation
* International Dialogue Centre - KAICIID
* International Organization of Turkic Culture (TÜRKSOY)
* Interparliamentary Assembly on Orthodoxy
* Religions for Peace

## Educational organizations and universities

* Academy of European Law (ERA)
* Asian Institute of Technology (AIT)
* Cerlalc
* Commonwealth of Learning (COL)
* EUCLID (university)
* European Schools
* European University Institute
* IHE Delft Institute for Water Education
* International Bureau of Education IBE, now a part of UNESCO
* International Institute for the Unification of Private Law
* United Nations University (UNU)
* University for Peace (UPEACE)
* World Maritime University (WMU/IMO)
* International Federation of Library Associations and Institutions (IFLA)
* International Publishers Association(IPA)

## Law enforcement cooperation

* International Criminal Court (ICC)
* International Criminal Police Organization (Interpol)
* Permanent Court of Arbitration (PCA)

## Transport

* Intergovernmental Organisation for International Carriage by Rail (OTIF)
* Organization for Cooperation of Railways (OSJD or OSShD)
* International Union of Railways（UIC）
* International Civil Aviation Organization
* TRACECA
* Southeast Europe Transport Community
* International Transport Forum (ITF)

## Humanitarian organizations

* International Cospas-Sarsat Programme
* UNDMRO

## Environmental organizations

* Agreement on the Conservation of Albatrosses and Petrels (ACAP)
* The Forum of Ministers of Environment of Latin America and the Caribbean
* Global Biodiversity Information Facility (GBIF)
* Global Environment Facility (GEF)
* Global Green Growth Institute (GGGI)
* Green Climate Fund (GCF)
* Intergovernmental Panel on Climate Change (IPCC)
* The International Union for Conservation of Nature (IUCN)
* Partnerships in Environmental Management for the Seas of East Asia (PEMSEA)
* UN Alliance for Sustainable Development Goals (UNASDG)
* United Nations Environment Programme (UNEP)

## Arms control

* Conference on Disarmament
* Organisation for the Prohibition of Chemical Weapons (OPCW)
* Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO)
* Wassenaar Arrangement
* Nuclear Suppliers Group (NSG)
* Australia Group (AG)
* Missile Technology Control Regime (MTCR)

## Energy organizations
### Multi sector organizations

* International Energy Agency
* Energy Charter
* Energy Community
* United Nations Industrial Development Organization (UNIDO)
* International Institute for Applied Systems Analysis (IIASA)
* International Energy Forum (IEF)

### Nuclear power organizations

* European Atomic Energy Community
* International Atomic Energy Agency
* International Centre for Synchrotron-Light for Experimental Science Applications in the Middle East
* Korean Peninsula Energy Development Organization
* Nuclear Energy Agency
* United Nations Atomic Energy Commission
* World Association of Nuclear Operators

### Sustainable energy organizations

* International Renewable Energy Agency (IRENA)
* Sustainable Energy for All (SE4ALL)
* Renewable Energy and Energy Efficiency Partnership (REEEP)
* International Solar Alliance

## Digital organizations

* Packet Clearing House (PCH)
* Digital 9 (D9)

## Ideological and political groupings

* Quadrilateral Security Dialogue (QSD)
* Non-Aligned Movement
* Group of Seven (G7)
* Group of 15 (G-15)
* Group of 77 (G-77)
* Group of 24 (G24)
* G20
* Alliance of Small Island States (AOSIS)
* BRICS (Brazil, Russia, India, China, South Africa)
* Bolivarian Alliance for the Americas (ALBA)
* Association of World Election Bodies (AWEB)
* New Agenda Coalition
* Non-Proliferation and Disarmament Initiative
* Western European and Others Group
(disbanded)

## Other

* International Commission on Missing Persons
* Advisory Centre on World Trade Organization Law
* International Centre for Genetic Engineering and Biotechnology
* International Institute for Democracy and Electoral Assistance (International IDEA)
* Partners in Population and Development
* South Centre
* SKA Observatory (SKAO)
* World Organisation for Animal Health
* Forum for India-Pacific Islands cooperation (FIPIC)
* U-Report
* International Center for Promotion of Enterprises (ICPE)
* International Council on Social Welfare

## Defunct

* Allied Control Council
* Arab Cooperation Council
* Central Treaty Organization
* Comecon
* Council of Ambassadors
* Customs and Economic Union of Central Africa
* Delian League
* Eurasian Economic Community (transformed into Eurasian Economic Union)
* French Community
* French Union
* G33
* International Authority for the Ruhr
* International Trade Organization
* Latin League
* Latin Union
* League of Corinth
* League of Nations
* Peloponnesian League
* Organisation of African Unity
* Southeast Asia Treaty Organization
* Union of African States