English: A map of full national members of International Astronomical Union based on IAU National Members. Interim, observer, suspended, and terminated members are excluded. National members are professional astronomical communities representing their country's affiliation with the IAU.

As of May 2023, there are 65 national members. Among others, this includes:

• the Australian Academy of Science
• the Chinese Astronomical Society
• the French Academy of Sciences
• the Indian National Science Academy
• the National Academies (United States)
• the National Research Foundation of South Africa
• the National Scientific and Technical Research Council (Argentina)
• KACST (مدينة الملك عبدالعزيز للعلوم والتقنية) (Saudi Arabia)
• the Council of German Observatories
• the Royal Astronomical Society (United Kingdom)
• the Royal Astronomical Society of New Zealand
• the Royal Swedish Academy of Sciences
• the Russian Academy of Sciences
• the Science Council of Japan

and many other societies, organizations and academies from sixty other countries.