| | Stadt | Land |
|---|
| 2020health | London | United Kingdom |
| Academy for the Development of a Democratic Environment (AZAD) | Valletta | Malta |
| Academy of Liberalism | Tallin | Estonia |
| Accion Emprendedora | Santiago de Chile | Chile |
| Acton Institute | Grand Rapids / Michigan | USA |
| Adam Smith Center | Warsaw | Poland |
| Adam Smith Institute | London | UK |
| Adam Smith Society | Mailand | Italy |
| Adelphi Research | Berlin | Germany |
| Adelphi consult | Berlin | Germany |
| Adriatic Institute for Public Policy | Rijeka | Croatia |
| AfroBarometer | | International |
| Agenda Austria | Wien | Austria |
| Aktionsgemeinschaft Soziale Marktwirtschaft | Tübingen | Germany |
| Alaska Center for Public Policy | Anchorage | USA |
| Albanian Liberal Institute | Tirana | Albania |
| Alexander Langer Foundation | Bozen | Italy |
| Allianz für den Rechtsstaat | Berlin | Germany |
| Alois Mock Institut | St. Pölten | Austria |
| Alternative Foundation | Barcelona | Spain |
| American Economic Association | | |
| American Enterprise Institute for Public Policy Research | Washington, D.C. | USA |
| Americans for Tax Reform | | |
| Amicus Europae Foundation | Warsaw | Poland |
| Analytical Centre on Globalization and Regional Cooperation (ACGRC) | Jerewan | Armenia |
| Anders Chydenius Foundation | Kokkola | Finland |
| Andes Libres | Cusco | Peru |
| Antall József Knowledge Centre | Budapest | Hungary |
| Anton Tunega Foundation | Bratislava | Slovakia |
| Arbejderbevaegelsens Erhvervsrad | Copenhagen | Denmark |
| Arkansas Advocates for Children and Families | Little Rock | USA |
| Asian Institute of Policy Studies | | |
| Asociacion Escuela Cristiana de Liderazgo | Iquitos | Peru |
| Asociacion Nacional de Fomento Economico | San Jose | Costa Rica |
| Asociacion de Consumidores Libres | San José | Costa Rica |
| Association Culturelle Joseph Jacquemotte | Brussels | Belgium |
| Association for Liberal Thinking | Ankara | Turkey |
| Association for Modern Economy | | |
| Association for the Development of the Romanian Social Forum (AD FSR) | Bucharest | Romania |
| Association of Private Enterprise Education | | |
| Associazione Bruno Trentin - ISF - IREF | Rome | Italy |
| Atlantic Commission (Netherlands) | | |
| Atlantik-Brücke e.V. | Berlin | Germany |
| Atlas Initiative für Recht und Freiheit e.V. | Frankfurt am Main | Germany |
| Atlas Network | | USA |
| Atvisa visuomene ir jos draugai | Klaipėda | Lithuania |
| Austrian Economics Center | Vienna | Austria |
| Austrian Institute for European Security Policy | Maria Enzersdorf | Austria |
| Avenir Suisse | Zürich | Switzerland |
| BEworks | Toronto | Canada |