Australia
Atheist Foundation of Australia
Australian Counter-Fundamentalism Movement
Council of Australian Humanist Societies
Rationalist Society of Australia
Austria
Freidenker, Atheisten, Humanisten & Co. (Freethinkers, Atheists, Humanists & Others)
Belgium
European Humanist Federation
Brazil
Associação Brasileira de Ateus e Agnósticos (Brazilian Association of Atheists and Agnostics)
Partido Humanista da Solidariedade (Brazilian Humanist Solidarity Party)
Sociedade da Terra Redonda (Round Earth Society)
Canada
Canadian Secular Alliance
Humanist Association of Canada
Ontario Consultants on Religious Tolerance
Skeptics Canada
Cuba
Movimiento Humanista Evolucionario Cubano (Cuban Evolutionary Humanist Movement)
Denmark
Dansk Ateistisk Selskab (Danish Atheist Society)
Finland
Atheist Association of Finland
Prometheus-leirin tuki ry (Support Society of Prometheus Camp)
Vapaa-ajattelijain liitto (Union of Freethinkers)
France
Ligue de l’Enseignement et de l’Education Permanente
Fédération Nationale de la Libre Pensée (French National Federation of Freethinkers)
Germany
Brandenburgischer Freidenker-Verband e.V.
Dachverband Freier Weltanschauungsgemeinschafen
Freireligiöse Landesgemeinde Pfalz
Gesellschaft zur wissenschaftlichen Untersuchung von Parawissenschaften e.V. (German Skeptics)
Humanistischer Verband Deutschlands
Internationaler Bund der Konfessionslosen und Atheisten (International League of Nonreligious and Atheists)
Zentralrat der Ex-Muslime (Central Council of Ex-Muslims)
Greece
Iceland
Samfélag trúlausra (The Atheist Society)
Sidmennt (Icelandic Ethical Humanist Association)
India
Atheist Centre (Atheism in India)
Center for Inquiry – India
Indian Rationalist Association
Indonesia
Ireland
Humanist Association of Ireland
Italy
Circolo Culturale “Giordano Bruno” di Milano
Comitato Torinese per la Laicita’ della Scuola
Unione degli Atei e degli Agnostici Razionalisti (Atheists and Agnostics Rationalists Union)
Luxembourg
Liberté de Conscience (LIBCO)
Mexico
Asociación Mexicana Etica Racionalista
Nepal
Research Academica for Humanism and Jai Prithvi
Society For Humanism (SOCH) Nepal
Unique Unity for Humanity-Nepal
Netherlands
De Vrije Gedachte (The Dutch Freethinking Association)
Humanistisch Instituut voor Ontwikkelingsamenwerking
Humanistisch Vormingsonderwijs
Humanistische Stichting voor Bejaarden Huisvesting
New Zealand
Humanist Society of New Zealand
New Zealand Association of Rationalists and Humanists
Nigeria
Norway
Norwegian Heathen Society
Pakistan
Atheist and Agnostic Alliance Pakistan
Peru
Comité para la Investigación de lo Paranormal, Seudocientífico e Irracional en el Perú (CIPSI-PERÚ)
Peruvian Rationalist Humanists (HURA-PERU)
Philippines
Philippine Atheists and Agnostics Society
Poland
Towarzystwo Humanistyczne (Polish Humanist Association)
Polskie Stowarzyszenie Wolnomyslicieli
Portugal
Russia
Scotland
Slovakia
Prometheus Society of Slovakia
South Africa
South African Free and Critical Thinkers
Spain
Sweden
Tanzania
Sisi Kwa Sisi (Free and Fearless Thinkers)
Turkey
Uganda
United Kingdom
Association for Skeptical Enquiry
Gay and Lesbian Humanist Association
Richard Dawkins Foundation for Reason and Science
United States of America
American Civil Liberties Union
Americans for Religious Liberty
Americans United for Separation of Church and State
Center for Naturalism
The Church of Spiritual Humanism
Committee for the Scientific Examination of Religion
Committee for Skeptical Inquiry
Freedom From Religion Foundation
The Humanist Society (for secular wedding ceremonies and such)
Independent Investigations Group
Institute for Humanist Studies
James Randi Educational Foundation
Military Association of Atheists and Freethinkers
National Center for Science Education
Objectivity, Accuracy, and Balance In Teaching About Religion
Resources for Independent Thinking
Richard Dawkins Foundation for Reason and Science
Society for Humanistic Judaism
Unitarian Universalist Infidels
United Coalition for Reason