International Organizations and their Headquarters
UN Organizations
| Organizations Name | Abbreviation | Headquarters | Formation |
| United Nations | UN | New York City, USA | 1945 |
| Food and Agriculture Organization | FAO | Palazzo FAO, Rome, Italy | 1945 |
| International Labour Organization | ILO | Geneva, Switzerland | 1919 |
| International Civil Aviation Organization | ICAO | Montreal, Quebec, Canada | 1947 |
| International Maritime Organization | IMO | London, United Kingdom | 1959 |
| United Nations High Commissioner for Refugees | UNHCR | Geneva, Switzerland | 1950 |
| Joint United Nations Programme on HIV/AIDS | UNAIDS | Geneva, Switzerland | 1996 |
| United Nations Atomic Energy Commission | UNAEC | New York City, USA | 1946 |
| United Nations Capital Development Fund | UNCDF | New York City, USA | |
| United Nations Children’s Fund | UNICEF | New York City, USA | 1946 |
| United Nations Development Programme | UNDP | New York City, USA | 1965 |
| United Nations Educational, Scientific and Cultural Organization | UNESCO | Paris, France | 1946 |
| United Nations Environment Programme | UNEP | Nairobi, Kenya | 1972 |
| United Nations Human Settlements Programme | UN-Habitat | Nairobi, Kenya | 1978 |
| United Nations Industrial Development Organization | UNIDO | Vienna, Austria | 1985 |
| United Nations International Strategy for Disaster Reduction | UNISDR | Geneva, Switzerland | 2000 |
| United Nations Office on Drugs and Crime | UNODC | Vienna, Austria | 1997 |
| Universal Postal Union | UPU | Bern, Switzerland | 1874 |
| World Health Organization | WHO | Geneva, Switzerland | 1948 |
| World Intellectual Property Organization | WIPO | Geneva, Switzerland | 1967 |
| World Food Programme | WFP | Rome, Italy | 1961 |
| World Meteorological Organization | WMO | Geneva, Switzerland | 1950 |
| World Tourism Organization | UNWTO | Madrid, Spain | 1957 |
| International Rescue Committee | IRC | New York City, United States | 1933 |
| International Atomic Energy Agency | IAEA | Vienna, Austria | 1957 |
| International Telecommunication Union | ITU | Geneva, Switzerland | 1947 |
| Office of the High Commissioner for Human Rights | OHCHR | Geneva, Switzerland | 1993 |
Political and Economic Organizations
| Organizations Name | Abbreviation | Headquarters | Formation |
| European Union | EU | Brussels | 1958 |
| African, Caribbean and Pacific Group of States | ACP | Brussels – Belgium | 1975 |
| African Union | AU | Addis Ababa,Johannesburg | 2001y |
| Andean Community | CAN | Lima, Peru. | 1969 |
| Arab League(League of Arab States) | – | Cairo | 1905y |
| Arab Maghreb Union | AMU | Rabat, Morocco | 1956 |
| Asia-Pacific Economic Cooperation | APEC | Singapore | 1905y |
| Association of Southeast Asian Nations | ASEAN | Jakarta, Indonesia | 1967 |
| Caribbean Community | CARICOM | Georgetown, Guyana. | 1973 |
| Central American Parliament | PARLACEN | Guatemala City | 1980 |
| Common Market of East and Southern Africa | COMESA | Lusaka, Zambia | 1994 |
| Commonwealth of Nations (British Commonwealth) | – | London, United Kingdom | 1926 |
| Commonwealth of Independent States (Russian Commonwealth) | CIS | Moscow,Russian | 1991 |
| Council of Europe | CoE | Strasbourg, France | 1949 |
| East African Community | EAC | Arusha | 1967 |
| Economic Community of West African States | ECOWAS | Abuja, Nigeria | 1975 |
| European Free Trade Association | EFTA | Geneva, Switzerland | 1960 |
| Gulf Cooperation Council | GCC | Riyadh, Saudi Arabia | 1981 |
| Indian Ocean Commission | IOC | Port Louis, Mauritius | 1982 |
| Non-Aligned Movement | NAM | New York City, USA | 1961 |
| Nordic Council | – | Copenhagen, Denmark | 1952 |
| Organisation for Economic Co-operation and Development | OECD | Paris, France | 1948 |
| Organization for Security and Co-operation in Europe | OSCE | Vienna, Austria | 1973 |
| Organization of American States | OAS | Washington, D.C. | 1948 |
| Organisation of Eastern Caribbean States | OECS | Castries, Saint Lucia | 1981 |
| Organisation of Islamic Cooperation | OIC | Jeddah, Saudi Arabia | 1969 |
| Secretariat of the Pacific Community | SPC | Nouméa | 1947 |
| Pacific Islands Forum | – | Suva, Fiji | 1971 |
| South Asian Association for Regional Cooperation | SAARC | Kathmandu, Nepal | 1985 |
| Southern African Development Community | SADC | Gaborone, Botswana | 1992 |
| Union of South American Nations | USAN | Quito, Ecuador | 2004 |
| Unrepresented Nations and Peoples Organization | UNPO | The Hague, Netherlands | 1991 |
| World Trade Organization | WTO | Geneva, Switzerland | 1995 |
| Economic and Social Commission for Asia and the Pacific | ESCAP | Bangkok, Thailand | 1947 |
Military Organizations
| Organizations Name | Abbreviation | Headquarters | Formation |
| North Atlantic Treaty Organisation | NATO | Brussels, Belgium | 1949 |
| European Security and Defence Policy | ESDP | Paris | |
| Shanghai Cooperation Organisation | SCO | Beijing, China | 1996 |
| Collective Security Treaty Organization | CSTO | Moscow, Russia | 1992 |
| Peace and Security Council | PSC | Addis Ababa |
Financial Organizations
| Organizations Name | Abbreviation | Headquarters | Formation |
| World Bank | – | Washington D.C., United States | 1944 |
| African Development Bank | AfDB | Abidjan, Ivory Coast(statutory) & Tunis, Tunisia (temporary) | 1963 |
| Asian Development Bank | ADB | Metro Manila, Philippines | 1966 |
| European Bank for Reconstruction and Development | EBRD | London | 1991 |
| Inter-American Development Bank | IDB | Washington, D.C. | 1959 |
| International Monetary Fund | IMF | Washington, D.C | 1945 |
| Islamic Development Bank | IDB | Jeddah, Saudi Arabia | 1973 |
| International Monetary Fund | IMF | Washington, D.C., United States | 1945 |
| International Fund for Agricultural Development | IFAD | Rome, Italy | 1977 |
| Bank for International Settlements | BIS | Basel, Switzerland | 1930 |
| Black Sea Trade and Development Bank | BSTDB | Thessaloniki, Greece | 1997 |
| Caribbean Development Bank | CDB | Bridgetown, Barbados | 1969 |
| Nordic Development Fund | NDF | Helsinki, Finland. | 1989 |
| Nordic Investment Bank | NIB | Helsinki, Finland. | 1970 |
| European Central Bank | ECB | Frankfurt, Germany | 1998 |
Sports Federations
| Organizations Name | Abbreviation | Headquarters | Formation |
| Asian Football Confederation | AFC | Kuala Lumpur, Malaysia | 1954 |
| Confederation of African Football | CAF | 6th of October City, Egypt. | 1957 |
| Confederation of North, Central American and Caribbean Association Football | CONCACAF | Miami, Florida, U.S. | 1961 |
| South American Football Confederation | CONMEBOL | Luque, Paraguay | 1916 |
| Oceania Football Confederation | OFC | Auckland, New Zealand | 1966 |
| Union of European Football Associations | UEFA | Nyon, Switzerland | 1954 |
| World Chess Federation(Fédération Internationale des Échecs ) | FIDE | Athens, Greece | 1924 |
| International Federation of Association Football(Fédération Internationale de Football Association) | FIFA | Zürich, Switzerland | 1904 |
| International Cricket Council | ICC | Dubai, United Arab Emirates | 1909 |
| International Olympic Committee | IOC | Lausanne, Switzerland | 1894 |
| International Paralympic Committee | IPC | Bonn, Germany | 1989 |
| World Rugby(International Rugby Football Board) | IRFB | Dublin,Ireland | 1886 |
| Commonwealth Games Federation | CGF | London, United Kingdom | 1930 |
| International Tennis Federation | ITF | London, UK | 1913 |
| Badminton World Federation | BWF | Kuala Lumpur, Malaysia | 1934 |
| International Hockey Federation | FIH | Lausanne, Switzerland | 1924 |
Financial Organizations :
| Organizations Name | Abbreviation | Headquarters | Formation |
| European Space Agency | ESA | Paris,France | 1975 |
| Indian Space Research Organisation | ISRO | Bangalore, India | 1969 |
| National Aeronautics and Space Administration | NASA | Washington, D.C. , USA | 1958 |
| United Kingdom Space Agency | UKSA | Swindon, Wiltshire | 2010 |
| China National Space Administration | CNSA | Beijing, China | 1993 |
| Russian Federal Space Agency | Roscosmos | Moscow, Russia | 1992 |
| French Space Agency | CNES | Paris, France | 1961 |
| Japan Aerospace Exploration Agency | JAXA | Tokyo, Japan | 2003 |
| German Aerospace Center | DLR | Cologne | 1969 |
| Italian Space Agency | ASI | Rome, Italy | 1988 |
Other Important Organization :
| Organizations Name | Abbreviation | Headquarters | Formation |
| Colombo Plan | – | Colombo, Sri Lanka | 1950 |
| Antarctic Treaty System | ATS | Washington, D.C., USA | 1959 |
| Intergovernmental Authority on Development | IGAD | Djibouti City | 1986 |
| International Committee of the Red Cross | ICRC | Geneva, Switzerland | 1863 |
| International Court of Justice | ICJ | The Hague, Netherlands | 1945 |
| International Criminal Court | ICC | The Hague, Netherlands | 1998 |
| International Criminal Police Organization | INTERPOL | Lyon, France | 1923 |
| International Federation of Red Cross and Red Crescent Societies | IFRC | Geneva, Switzerland | 1919 |
| International Organization for Migration | IOM | Geneva, Switzerland | 1951 |
| International Centre for Migration Policy Development | ICMPD | Vienna, Austria | 1993 |
| Organisation for the Prohibition of Chemical Weapons | OPCW | The Hague, Netherlands | 1997 |
| Organization of the Petroleum Exporting Countries | OPEC | Vienna, Austria | 1960 |
| World Toilet Organization | WTO | Singapore | 2001 |