| Eduardo Frei Stichting | Netherlands | The Hague | 1970 |
| Education for Democracy Foundation | | | |
| Educational Initiative for Central and Eastern Europe (EICEE) | | | |
| Eigentümlich Frei | Germany | 40549 Düsseldorf | 1998 |
| Ein Prozent | | 02797 Kurort Oybin | 2015 |
| Einaudi Institute for Economics and Finance | Italy | Rome | 2008 |
| El Ojo Digital | Argentina | | |
| Energy Security | Lithuania | Vilnius | |
| Entscheidung für´s Leben | Germany | 10119 Berlin | |
| Espaces Marx | France | Paris | 1995 |
| Estat.cz | Czech Republic | Prague | 2004 |
| Estudantes Pela Liberdade | Brazil | Network - no headquarter | |
| Estudiantes por la Libertad | Washington DC | | |
| Etopia | Belgium | Namur | 2005 |
| Eudoxa | Sweden | Stockholm | |
| Eurolib Network | France | | 2004 |
| Europa Institut | | | |
| EuropaNova | France/EU | Paris | 2003 |
| Europartenaires | France | Paris | 1994 |
| Europe of Citizens Foundation | Spain | Madrid | 1998 |
| European Academy for Democracy | Czech Republic | Prague | 1991 |
| European Academy of Yuste | | | |
| European Alternatives | Italy | Rome | 2007 |
| European Center of Austrian Economics Foundation | Liechtenstein | Vaduz | 2004 |
| European Coalition for Economic Growth | Austria | Vienna | 2006 |
| European Committee For A Constructive Tomorrow | Germany | Jena | |
| European Council on Foreign Relations | | | |
| European Dignity Watch | Belgium | Brussels | 2010 |
| European Energy Institute | | | |
| European Enterprise Institute | Belgium | Brussels | 2004 |
| European Forum for Democracy and Solidarity | Netherlands | Amsterdam | 1993 |
| European Ideas Network (EIN) | Belgium | Brüssel | 2002 |
| European Institute for Climate and Energy | | | |
| European Law Institute | | | 2011 |
| European Liberal Forum | Belgium | Brussels | 2007 |
| European Liberal Youth (LYMEC) | Belgium | Brussels | 1976 |
| European Network of Political Foudations | | | |
| European Network of Political Foundation (ENoP) | | | |
| European Policy Center | Belgium | Brussels | 1996 |
| European Policy Forum | UK | London | 1992 |
| European Policy Information Center | | | 2014 |
| European Renewal | Netherlands | Amsterdam | 2007 |
| Europäisches Institut für Klima und Energie | Germany | Jena | 2007 |
| Evropska Akademie pro Demokracii | Czech Republic | Jihlava | 1991 |
| Explosive Ordnance Disposal | Slovakia | Trenčín | |
| F.A.Hayek Foundation (Slovakia) | | | |
| F.A.Hayek Foundation Bratislava | | | |
| FEMAN | Slovakia | Kosice | 2000 |
| FIEL - Fundacion de Investigaciones Economicas Latinoamericanas | Argentina | Buenos Aires | 1964 |
| Federalismo y Libertad | Argentina | | 2012 |
| Finnish Business and Policy Forum (EVA) | Finland | Helsinki | |
| Flemish People's Movement | | | |
| Fondation Copernic | France | Paris | 1998 |
| Fondation Gabriel Péri | France | Pantin | 2004 |
| Fondation Jean-Jaurès | France | Paris | 1992 |
| Fondation Robert Krieps | Luxembourg | Luxembourg | 2006 |
| Fondation Robert Schuman | France | Paris | 1991 |
| Fondation de l'Ecologie Politique | France | Paris | 2012 |
| Fondation pour l'Innovation Politique | France | Paris | 2004 |
| Fondazione Critica Liberale | Italy | Rome | 1994 |
| Fondazione Farefuturo | Italy | Rome | 2007 |
| Fondazione Foedus | Italy | Rome | 2003 |
| Fondazione Istituto Gramsci | Italy | Rome | 1950 |
| Fondazione ItalianiEuropei | Italy | Rome | 1998 |
| Fondazione Liberal | Italy | Rome | 1995 |
| Fondazione Respublica | Italy | Milano | 1999 |
| Fondazione Socialismo | Italy | Rome | 2009 |
| Fondazione Ugo Spirito e Renzo De Felice | Italy | Rome | 1981 |
| Fondazzjoni Ideat | Malta | Hamrun | 2009 |
| Forma, Formacion y Accion | Venezuela | | 2003 |
| Foro de Estudios sobre la Administracion de Justicia | Argentina | Buenos Aires | |
| Forschungsinstitut zur Zukunft der Arbeit | Germany | Cologne | 1998 |
| Forschungsseminar Radein zum Vergleich von Wirtschafts- und Gesellschaftssystemen e.V. | Germany | Pforzheim | 1967 |
| Forum Velden | | Klagenfurt | 2007 |
| Forum for Greece | Greece | Athens | 2010 |
| Forum for Reforms, Entrepreneurship and Sustainability (FORES) | Sweden | Stockholm | 2007 |
| Foundation Hope for Haiti, Inc. | Florida | Royal Palm Beach | |
| Foundation for Economic Education | | | |
| Foundation for European Progressive Studies (FEPS) | Belgium | Brussels | 2008 |
| Foundation for Fundamental Rights | Poland | Warsaw | 2007 |
| Foundation for Market Economy (FME) | Hungary | Budapest | |
| Foundation for Marxist Studies | Spain | Madrid | 1978 |
| Foundation for Occidental Ethics and Culture (STAB) | Switzerland | Zurich | 1968 |
| Foundation for Social Studies and Analysis | | | |
| Foundation for a Civic Hungary | Hungary | Budapest | 2003 |
| Fraser Institute | Canada | Vancouver; offices in Montreal, Calgary and Toronto | 1974 |
| Free Minds Association | Aserbeidschan. | Baku | |
| Freedom and Reform Institute | Hungary | Budapest | |
| Freedom and Solidarity Foundation | Latvia | Riga | 2007 |
| Freedom to Trade Initiative | | | |
| FreedomWorks | | | |
| Freiheits Akademie (Oesterreich) | Austria | Vienna | 2012 |
| Freiheitsakademie | Austria | Wien | 2012 |
| Freiheitswerk | Germany | | |
| French Nudge Project | France | Paris | |
| Friedrich August von Hayek-Stiftung für eine freie Gesellschaft | Germany | Berlin | |
| Friedrich Ebert Stiftung | | | |
| Friedrich Ebert Stiftung (FES) | Germany | Bonn | 1947 |
| Friedrich Naumann Stiftung für die Freiheit | Germany | Potsdam | 1958 |
| Friedrich von Hayek Stiftung | Germany | Freiburg | 1999 |
| Friends of Europe | | | |
| Fronteiras do Pensamento | Brazil | Porto Alegre | 2006 |
| Frédéric Bastiat Stichting | Netherlands | Amsterdam | |
| Fundacio Gabriel Alomar | Spain | Palma Illes Balears | 2006 |
| Fundacion Atlas 1853 - para una sociedad libre | Argentina | Buenos Aires | 1998 |
| Fundacion Bases | Argentina | Rosario | 2004 |
| Fundacion Burke | Spain | Madrid | |
| Fundacion Centro de Pensamiento Primero Colombia | Colombia | Bogotá | 2007 |
| Fundacion Chile Interactural | Chile | Temuco | |
| Fundacion Civico Republicana | Argentina | Buenos Aires | |
| Fundacion Club de la Libertad | Argentina | Corrientes | 2013 |
| Fundacion Contemporanea | Argentina | Buenos Aires | 1992 |
| Fundacion EQUO | Spain | Madrid | 2011 |
| Fundacion Ecuador Libre | Ecuador | Guayaquil | |
| Fundacion Eleutera | Honduras | San Pedro Sula | 2013 |
| Fundacion Global | Argentina | Mar del Plata | 1996 |
| Fundacion Hayek Colombia | Colombia | Bogotá | |
| Fundacion Iberoamerica Europa | Spain | Madrid | 1981 |
| Fundacion Instituto David Hume | Argentina | Ciudad de Buenos Aires | |
| Fundacion Internacional para la Libertad | Argentina | orginally based Madrid, moved to Rosario (Argentina) | 2003 |
| Fundacion Internacionalismo Democratico | Colombia | | |
| Fundacion Issos para la Libertad y el Desarrollo | Paraguay | Belén | |
| Fundacion Jaime Guzman | Chile | | 1991 |
| Fundacion Jovenes Lideres | Argentina | Buenos Aires | |
| Fundacion Libertad | Argentina | Santa Fe | 1988 |
| Fundacion Libertad - Panama | Panama | | |
| Fundacion Libertad Paraguay | Paraguay | | 1999 |
| Fundacion Libertad y Progreso | Argentina | Buenos Aires | |
| Fundacion Nicaragüense para el Desarrollo Economico y Social | Nicaragua | Managua | |
| Fundacion Nueva Democracia | Bolivia | Santa Cruz de la Sierra | 2008 |
| Fundacion Pablo Iglesias | Spain | Madrid | 1977 |
| Fundacion Para el Desarrollo Integral de la Sociedad | Dominican Republic | | |
| Fundacion Pensar | Argentina | | |
| Fundacion Pensar Peru | Peru | | |
| Fundacion Rafael Preciado Hernandez, A.C. | Mexico | Mexico City | 1993 |
| Fundacion Rafael del Pino | Spain | | |
| Fundacion Salvadorena para el Desarrollo Economico y Social | El Salvador | | 1983 |
| Fundacion para el Analisis y los Estudios Sociales (FAES) | Spain | Madrid | 1989 |
| Fundacion para el Progreso | Chile | Santiago de Chile | 2011 |
| Fundacion para la Responsabilidad Intelectual | Argentina | Buenos Aires | |
| Fundació Catalunya Oberta (FCO) | Spain | Barcelona | |
| Fundació Nous Horitzons | Spain | Barcelona | 1992 |
| Fundació Rafael Campalans | Spain | Barcelona | 1979 |
| Fundacja Industrial | Poland | Lódz | 2007 |
| Fundacja Klub Obywatelski | Poland | Warsaw | 1998 |
| Fundacja Projekt Polska | Poland | Warsaw | 2007 |
| Fundacja Republikańska | | | |
| Fundatia Institutul Ovidiu Sincai | Romania | Bucharest | 2002 |
| Fundação Res Publica | Portugal | Lisbon | 2008 |
| Fórum da Liberdade | | | |
| Förderstiftung konservative Bildung und Forschung | Germany | Berlin | 2000 |
| Galician Society for Freedom and Democracy | Spain | Tui | 2009 |
| Gauche reformiste europeenne | Belgium | Brussels | 2006 |
| Gdansk Institute for Market Economics | Poland | Gdańsk | 1989 |
| Geneva Centre for Security Policy | | | |
| Ghana Center for Democratic Development | Ghana | Legon-Accra | 1998 |
| Global Agenda Council - Water Security | Switzerland | | |
| Global Government Forum | UK | | 2014 |
| Global Vision | United Kingdom | London | |
| Global Warming Policy Forum | United Kingdom | London | 2009 |
| Global Warming Policy Foundation | United Kingdom | London | 2009 |
| Goldwater Institute | | | |
| GovLab (NYU) | USA | New York | 2012 |
| Government Innovators Network | USA | Cambridge, MA | |
| Greek Green Institute | Greece | Athens | 2011 |
| Green Economics Institute | UK | Reading | 2004 |
| Green European Foundation | Luxembourg | Luxembourg | 2008 |
| Green Forum Foundation | Sweden | Stockholm | 1995 |
| Green Foundation Ireland | Ireland | | 2011 |
| Green Thought Association | Turkey | Istanbul | 2008 |
| Group for Legal and Political Studies | Kosovo | Prishtina | |
| Gruene Bildungswerkstatt | Austria | Vienna | 1987 |
| Grupo Refundar | Argentina | | |
| Gréng Stëftung | Luxembourg | Luxembourg | 2009 |
| Grüne Bildungswerkstatt | Austria | Vienna | 1987 |
| HACER | USA | Washington | 1996 |
| Hamburg Institute for International Economics | Germany | Hamburg | 2005 |
| Hanns Seidel Stiftung | Germany | Munich | 1967 |
| Harvard Behavioural Insights Group | USA | Cambridge, MA | |
| Haya van Someren Stichting/VVD International | Netherlands | The Hague | 1981 |
| Hayek Institute | Austria | Vienna | 1993 |
| Hayek Institute of Brussels | | | |
| Hayek-Gesellschaft | Germany | Berlin | 1998 |
| Health Consumer Powerhouse (HCP) | Sweden | Danderyd | 2004 |
| Health Foundation, The | UK | London | 2001 |
| Health Policy Institute | Slovakia | Prokopova 15, 851 01 Bratislava | 2005 |
| Health Reform.cz | Czech Republic | Prag | 2004 |
| Heartland Institute | USA | Chicago | 1986 |
| Heinrich Böll Stiftung | Germany | Berlin | 1997 |
| Hellenic Leadership Institute (HLI) | Greece | Athen | |
| Heritage Foundation | | | |
| Honduras Investiga | Honduras | San Pedro Sula | |
| Hoover Institution | | | |
| Http://www.friendsofeurope.org/ | | | |
| Hudson Institute | | | |
| Human Intelligence | Romania | Oradea | |
| IDEA | Germany | 35528 Wetzlar | 1970 |
| IDEAL Instituto Desarrollo Ambiente y Libertad IDEAL Latinoamerica | Costa Rica | Heredia | |
| IDL-Instituto Amaro da Costa | Portugal | Lisbon | 1975 |
| IMANI | | | |
| INudgeyou | Denmark | Copenhagen | 2010 |
| IPPR (Institute for Public Policy Research) | UK | London | 1988 |
| ISA - Instituto de estudios para una Sociedad Abierta | Panama | | 2009 |
| IZA - Institute of Labor Economics | Germany | Bonn | 1998 |
| Icelandic Research Centre for Innovation and Economic Growth | Iceland | Reykjavík | 2012 |
| Ideas | Spain | Madrid | 2008 |
| Ideas42 | USA | New York | 2008 |
| Identitäre Bewegung | Germany | 33184 Altenbeken | 2014 |
| Ifo Institut für Wirtschaftsforschung | Germany | Munich | 1949 |
| Information Society Alliance EURIM | | | |
| Initiative Familienschutz | Germany | Berlin | |
| Initiative Neue Soziale Marktwirtschaft | Germany | 10117 Berlin | 1999 |
| Initiative for Public Policy Analysis | Nigeria | | |
| Initiative for Science, Society and Policy | Denmark | Odense | 2009 |
| Innovation Journal | Canada | | 1995 |
| Institucion Futuro | Spain | Huarte | |
| Institución Futuro | | | |
| Institut Constant de Rebecque | Switzerland | Lausanne | |
| Institut Coppet | France/EU | Paris | 2010 |
| Institut Economique Molinari | Belgium | Brussels | 2003 |
| Institut Euro 92 | France | | |
| Institut Montaigne | France | Paris | 2004 |
| Institut Qualitaet in der Politik | Austria | | 2013 |
| Institut Thomas More | | | |
| Institut Turgot | | | 2002 |
| Institut dr. Jozeta Pucnika | Slovenia | Ljubljana | |
| Institut fuer Wertewirtschaft | Austria | Vienna | 2007 |
| Institut fuer soziale Gegenwartsfragen | Germany | Stuttgart | 1991 |
| Institut für Demographie, Allgemeinwohl und Familie e.V. | | 53757 Sankt Augustin | 2011 |
| Institut für Gesundheits- und Sozialforschung | Germany | Berlin | 1980 |
| Institut für Qualität der Politik | Austria | | 2013 |
| Institut für Sozialforschung und Gesellschaftspolitik | Germany | Cologne | 1952 |
| Institut für Staatspolitik | Germany | Steigra | 2000 |
| Institut für strategische Studien Berlin | Germany | Berlin | |
| Institute Emile Vandervelde | Belgium | Brussels | 1946 |
| Institute Thomas More | Belgium | Brüssel | 2003 |
| Institute de Formation Politique | | Paris | |
| Institute dr. Janez Evangelist Krek | Slovenia | Ljubljana | 2009 |
| Institute for Development and Social Initiatives (IDIS) | Moldova | Chişinău | 1993 |
| Institute for East West Security Studies | | | |
| Institute for Economic Development and Social Reform (INEKO) | | | |
| Institute for Economic Education | | | |
| Institute for Economic Studies Europe (IES) | France | Aix-en-Provence | |
| Institute for Economic and Social Reforms (INEKO) | Slovakia | Bratislava | 1999 |
| Institute for Free Enterprise | Germany | Berlin | 1998 |
| Institute for Government (UK) | UK | London | 2008 |
| Institute for Human Studies | USA | | |
| Institute for Humane Studies-Europe | | | |
| Institute for Innovation & Valuation in Health Care | Germany | Wiesbaden | |
| Institute for Labour Studies (ILS) | Slovenia | Ljubljana | 2012 |