National Scientific Members (120). Full in 91 countries and territories:
• Angola, Botswana, Cameroon, Egypt, Ethiopia, Kenya, Lesotho, Malawi, Mauritius, Morocco, Mozambique, Namibia, Nigeria, Seychelles, South Africa, United Republic of Tanzania, Togo, Uganda, Zimbabwe.
• Argentina, Brazil, Canada, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Jamaica, Mexico, Panama, Peru, United States of America.
• Bangladesh, China, India, Indonesia, Iran - Islamic Republic of, Iraq, Israel, Japan, Republic of Korea, Lebanon, Malaysia, Mongolia, Nepal, Pakistan, Philippines, Saudi Arabia, Singapore, Sri Lanka, Taiwan/China, Thailand.
• Australia, New Zealand.
• Albania, Armenia, Austria, Azerbaijan, Belgium, Bosnia and Herzegovina, Bulgaria, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, The former Yugoslav Republic of Macedonia, Republic of Moldova, Monaco, Montenegro, Netherlands, Norway, Poland, Portugal, Romania, Russian Federation, Serbia, Slovakia, Spain, Sweden, Switzerland, United Kingdom of Great Britain and Northern Ireland, Ukraine.
Included in the above, 1 regional entity:
• University of the South Pacific (USP)*.
National associate in 7 countries:
• Madagascar, Tunisia.
• Guatemala.
• Jordan, Kazakhstan.
• Georgia, Slovenia.
Included in the above, 1 organization listed in this Yearbook:
• Caribbean Academy of Sciences (CAS)*.
National Observers in 19 countries:
• Burkina Faso, Côte d'Ivoire, Ghana, Rwanda, Senegal, Sudan, Swaziland, Zambia.
• Bolivia (Plurinational State of), Uruguay, Venezuela (Bolivarian Republic of).
• Democratic People's Republic of Korea, Lao People's Democratic Republic, Tajikistan, Uzbekistan, Viet Nam.
• Belarus, Holy See, Turkey.
Scientific Union Members, 31 organizations listed in this Yearbook:
• International Sociological Association (ISA)*;
• International Astronomical Union (IAU)*;
• International Brain Research Organization (IBRO)*;
• International Geographical Union (IGU)*;
• International Mathematical Union (IMU)*;
• International Society for Photogrammetry and Remote Sensing (ISPRS)*;
• International Union of Anthropological and Ethnological Sciences (IUAES)*;
• International Union of Basic and Clinical Pharmacology (IUPHAR)*;
• International Union of Biochemistry and Molecular Biology (IUBMB)*;
• International Union of Biological Sciences (IUBS)*;
• International Union of Crystallography (IUCr)*;
• International Union of Food Science and Technology (IUFoST)*;
• International Union of Forest Research Organizations (IUFRO)*;
• International Union of Geodesy and Geophysics (IUGG)*;
• International Union of Geological Sciences (IUGS)*;
• International Union of the History and Philosophy of Science (IUHPS)*;
• International Union of Immunological Societies (IUIS)*;
• International Union of Materials Research Societies (IUMRS)*;
• International Union of Microbiological Societies (IUMS)*;
• International Union of Nutritional Sciences (IUNS)*;
• International Union for Physical and Engineering Sciences in Medicine (IUPESM)*;
• International Union of Physiological Sciences (IUPS)*;
• International Union of Psychological Science (IUPsyS)*;
• International Union for Pure and Applied Biophysics (IUPAB)*;
• International Union of Pure and Applied Chemistry (IUPAC)*;
• International Union of Pure and Applied Physics (IUPAP)*;
• International Union for Quaternary Research (INQUA)*;
• International Union of Soil Sciences (IUSS)*;
• International Union of Theoretical and Applied Mechanics (IUTAM)*;
• International Union of Toxicology (IUTOX)*;
• International Union of Radio Science (URSI)*.
International Scientific Associates (22):
• International Council for Industrial and Applied Mathematics (ICIAM)*;
• International Union of Speleology (UIS)*;
• Latin American Academy of Sciences (ACAL)*;
• Federation of Asian Scientific Academies and Societies (FASAS)*;
• International Federation of Surveyors (FIG)*;
• International Arctic Science Committee (IASC)*;
• International Association for Hydro-Environment Engineering and Research (IAHR)*;
• International Cartographic Association (ICA);
• International Commission for Acoustics (ICA)*;
• International Commission for Optics (ICO)*;
• International Council for Laboratory Animal Science (ICLAS)*;
• International Council for Scientific and Technical Information (ICSTI)*;
• International Federation for Information Processing (IFIP);
• International Federation of Library Associations and Institutions (IFLA);
• International Federation of Societies for Microscopy (IFSM)*;
• International Foundation for Science (IFS)*;
• International Institute for Applied Systems Analysis (IIASA)*;
• International Union for Vacuum Science, Technique and Applications (IUVSTA);
• International Water Association (IWA)*;
• Pacific Science Association (PSA)*;
• Society for Social Studies of Science (4S)*;
• TWAS*.