- African Network of Constitutional Lawyers | Reseau Africain de Droit Constitutionel
- Asociacion Argentina de Derecho Constitucional
- Asociación de Constitucionalistas de España
- Associaçao brasileira dos Constitucionalistas
- Association canadienne des professeurs de droit | Canadian Association of Law Teachers
- Association francaise de droit constitutionnel
- Association Malienne de Droit Constitutionnel
- Associazione Italiana dei Costituzionalisti
- Australasian Association of Constitutional Law
- China Law Society
- Constitutional Law Group (United Kingdom)
- Devolution Club
- Die Staatsrechtkring (the Dutch Association of Constitutional Law)
- Gesellschaft für Rechtsvergleichung
- Institute of Federalism
- Institute of Law and Public Policy, Moscow
- Institute of Law, Chinese Academy of Social Sciences
- Instituto de Investigaciones Jurídicas de la UNAM
- Sacher Institute, Hebrew University Jerusalem
- SAIFAC
- SIPE — Societas Iuris Publici Europaei
- Venice Commission | Commission de Venise
- Cline Center for Democracy