- The Association of Attenders and Alumni of the Academy (AAA)
 - The AAA is an association founded on 26 July 1923. It aims at maintaining intellectual and friendly relations between the attenders and alumni of the Hague Academy of International Law and to develop their international spirit.
- International Bar Association (IBA)
- Law organisation for individual legal professionals, Bar Associations and Law Societies. The IBA promotes the exchange of information between lawyers and legal associations worldwide, covering all areas of commercial law and public and professional interests. It supports the independence of the judiciary and the right of lawyers to practise their profession without interference. The IBA is dedicated to the protection of human rights and a just rule of law throughout the world.
- International Criminal Law Network (ICLN)
- The International Criminal Law Network, has been founded in 2002 by various international experts with the mission to organise professional and social interaction between practitioners, academics and policymakers in international criminal law.
- International Law Association (ILA)
- The International Law Association was founded in Brussels in 1873. Its objectives, under its Constitution, include the "study, elucidation and advancement of international law, public and private, the study of comparative law, the making of proposals for the solution of conflicts of law and for the unification of law, and the furthering of international understanding and goodwill".
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