Here is a list of Important International Organisations with their Head and Headquarter. These will help you in upcoming exams. [Updated as on 24 April 2020.]
| Name of the Organisation | Headquarter | Founded | Heads |
| Bank for International Settlements | Basel, Switzerland | 17 May 1930 | Jens Weidmann (Chairman)
Agustín Carstens (General Manager) |
| Asian Infrastructure Investment Bank (AIIB) | Beijing, China | January 16, 2016 | Jin Liqun |
| Universal Postal Union | Bern, Switzerland | 9 October 1874 | Bishar Abdirahman Hussein |
| North Atlantic Treaty Organisation (NATO) |
Brussels, Belgium |
4 April 1949 | Jens Stoltenberg |
| World Customs Organization | 26 January 1952 | Kunio Mikuriya | |
| World Economic Forum (WEF) | Cologny, Switzerland | January 1971 | Klaus Schwab |
| International Council for the Exploration of the Sea (ICES) | Copenhagen, Denmark | 1902 | Fritz W. Köster |
| International Cricket Council (ICC) | Dubai, United Arab Emirates | 15 June 1909 | Shashank Manohar (Chairman)
Manu Sawhney (CEO) |
| International Committee of the Red Cross (ICRC) |
Geneva, Switzerland |
17 February 1863 | Peter Maurer (President)
Yves Daccord (Director General) |
| International Labour Organisation (ILO/OIT) | 29 October 1919 | Guy Ryder | |
| International Telecommunication Union | 17 May 1865 | Houlin Zhao | |
| International Organization for Standardization (ISO) | 23 February 1947 | Eddy Njoroge | |
| United Nations Conference on Trade & Development (UNCTAD) | 1964 | Mukhisa Kituyi | |
| United Nations High Commissioner for Refugees | 14 December 1950 | Filippo Grandi | |
| World Health Organisation (WHO) | 7 April 1948 | Tedros Adhanom | |
| World Intellectual Property Organisation (WIPO Also called OMPI) | 14 July 1967 | Francis Gurry | |
| World Meteorological Organisation (WMO) | 23 March 1950 | Petteri Taalas (Secretary-General) David Grimes (President) |
|
| World Trade Organization (WTO) | 1 January 1995 | Roberto Azevêdo | |
| World Wide Fund for Nature (WWF) | Gland, Switzerland | 29 April 1961 | Carter Roberts |
| Association of South East Nations (ASEAN) | Jakarta, Indonesia | 8 August 1967 | Lim Jock Hoi |
| South Asian Association for Regional Cooperation (SAARC) | Kathmandu, Nepal | 8 December 1985 | Esala Weerakoon |
| International Olympic Committee (IOC) | Lausanne, Switzerland | 23 June 1894 | Thomas Bach |
| Amnesty International |
London, United Kingdom |
July 1961 | Kumi Naidoo |
| Commonwealth of Nations | 11 December 1931 | Patricia Scotland | |
| International Maritime Organisation (IMO) | 17 March 1948 | Kitack Lim | |
| Internet Corporation for Assigned Names and Numbers (ICANN) | Los Angeles, California, United States | 18 September 1998 | Göran Marby |
| International Criminal Police Organization, or INTERPOL | Lyon, France
|
1923 | Kim Jong Yang |
| World Tourism Organization | Madrid, Spain | 1975 | Zurab Pololikashvili |
| Asian Development Bank | Mandaluyong, Philippines | 19 December 1966 | Masatsugu Asakawa |
| International Civil Aviation Organization | Montreal, Canada | 4 April 1947 | Fang Liu |
| United Nations Children’s Fund (UNICEF) |
New York, United States |
11 December 1946 | Henrietta H. Fore |
| United Nations Organization (UN) | 24 October 1945 | António Guterres | |
| United Nations Populations Fund (UNFPA) | 1969 | Natalia Kanem | |
| United Nations Development Programme (UNDP) | 1 January 1966 | Achim Steiner | |
| United Nations Entity for Gender Equality and the Empowerment of Women, also known as UN Women | 2 July 2010 | Phumzile Mlambo-Ngcuka | |
| Organization for Economic Cooperation & Development (OECD) |
Paris, France |
30 September 1961 | Jose Angel Gurria |
| United Nations Education Scientific & Cultural Organisation (UNESCO) | 4 November 1946 | Audrey Azoulay | |
| International Energy Agency | 1974 | Fatih Birol | |
| Food & Agricultural Organisation (FAO) |
Rome, Italy |
16 October 1945 | Qu Dongyu |
| International Fund for Agricultural Development | 1977 | Gilbert Houngbo | |
| World Food Programme | 1961 | David Beasley | |
| New Development Bank (BRICS Development Bank) | Shanghai, China | 15 July 2014 | K. V. Kamath |
| Asia-Pacific Economic Cooperation (APEC) | Singapore | November 1989 | Mahathir bin Mohamad |
| International Court of Justice (ICJ) | The Hague, Netherlands | 26 June 1945 | Abdulqawi Yusuf |
| International Criminal Court | 17 July 1998 | Chile Eboe-Osuji | |
| International Atomic Energy Agency (IAEA) |
Vienna, Austria |
29 July 1957 | Rafael Grossi |
| Organization of Petroleum Exporting Countries (OPEC) | September 1960 | Mohammed Barkindo | |
| United Nations Industrial Development Organisation (UNIDO) | 1966 | Li Yong | |
| International Monetary Fund (IMF) | Washington, D.C., United States | 27 December 1945; | Kristalina Georgieva |
| World Bank Group | July 1945 | David Malpass |