-
[Name (English / local (abbreviation))]: Association against Quackery / Vereniging tegen de Kwakzalverij (VtdK)
[Founded]: 1881
[Region served]: Netherlands
[Notes]: Oldest skeptical organisation. Member of ECSO. -
[Name (English / local (abbreviation))]: Association for Skeptical Enquiry (ASKE)
[Founded]: 1997
[Region served]: United Kingdom
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Australian Skeptics
[Founded]: 1980
[Region served]: Australia
[Notes]: -
[Name (English / local (abbreviation))]: Brazilian Society of Skeptics and Rationalists / Sociedade Brasileira de Céticos e Racionalistas (SBCR)
[Founded]: 2001
[Region served]: Brazil
[Notes]: -
[Name (English / local (abbreviation))]: Center for Inquiry (CFI)
[Founded]: 1991
[Region served]: World
[Notes]: Global umbrella organisation based in Amherst, New York. -
[Name (English / local (abbreviation))]: Committee for the Advancement of Scientific Skepticism (CASS)
[Founded]: 2010
[Region served]: Canada
[Notes]: Part of Centre for Inquiry Canada. -
[Name (English / local (abbreviation))]: Committee for Skeptical Inquiry (CSI), formerly Committee for the Scientific Investigation of Claims of the Paranormal (CSICOP)
[Founded]: 1976
[Region served]: United States
[Notes]: Part of the Center for Inquiry. -
[Name (English / local (abbreviation))]: Committee Para / Comité Para
[Founded]: 1949
[Region served]: Belgium
[Notes]: Member of ECSO. Serves Wallonia and Brussels. -
[Name (English / local (abbreviation))]: Czech Skeptics Club Sisyfos / Český klub skeptiků Sisyfos (Sisyfos)
[Founded]: 1995
[Region served]: Czech Republic
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Dakshina Kannada Rationalist Association / தட்சிண கன்னட பகுத்தறிவாளர் ஒன்றியம் (DKRA)
[Founded]: 1976
[Region served]: India
[Notes]: Member of FIRA. -
[Name (English / local (abbreviation))]: The Free Thought / De Vrije Gedachte (DVG)
[Founded]: 1856
[Region served]: Netherlands
[Notes]: Focuses on atheism/secular humanism. -
[Name (English / local (abbreviation))]: Edinburgh Skeptics Society (EdSkeptics)
[Founded]: 2009
[Region served]: United Kingdom
[Notes]: -
[Name (English / local (abbreviation))]: European Council of Skeptical Organisations (ECSO)
[Founded]: 1994
[Region served]: Europe
[Notes]: European umbrella organisation, based in Roßdorf, Germany. -
[Name (English / local (abbreviation))]: Federation of Indian Rationalist Associations / இந்திய பகுத்தறிவாளர் ஒன்றியங்களின் பேரவை (FIRA)
[Founded]: 1997
[Region served]: India
[Notes]: Indian umbrella organisation. -
[Name (English / local (abbreviation))]: Freedom From Religion Foundation (FFRF)
[Founded]: 1978
[Region served]: United States
[Notes]: Focuses on state/church separation, nontheism, and atheism. -
[Name (English / local (abbreviation))]: French Association for Scientific Information / Association française pour l’information scientifique (AFIS)
[Founded]: 1968
[Region served]: France
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: German Society for Fighting Quackery / Deutsche Gesellschaft zur Bekämpfung des Kurpfuschertums (DGBK)
[Founded]: 1903
[Region served]: Germany
[Notes]: Dissolved in 1934. -
[Name (English / local (abbreviation))]: Glasgow Skeptics
[Founded]: 2009
[Region served]: United Kingdom
[Notes]: -
[Name (English / local (abbreviation))]: Good Thinking Society
[Founded]: 2012
[Region served]: United Kingdom
[Notes]: -
[Name (English / local (abbreviation))]: Het Denkgelag
[Founded]: 2012
[Region served]: Belgium
[Notes]: -
[Name (English / local (abbreviation))]: Hungarian Skeptic Society / Szkeptikus Társaság (HSS)
[Founded]: 2006
[Region served]: Hungary
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Independent Investigations Group (IIG)
[Founded]: 2000
[Region served]: United States
[Notes]: -
[Name (English / local (abbreviation))]: Indian CSICOP
[Founded]: 19??
[Region served]: India
[Notes]: Affiliated with CSI, member of FIRA. -
[Name (English / local (abbreviation))]: Indian Rationalist Association (IRA)
[Founded]: 1949
[Region served]: India
[Notes]: Member of Rationalist International. -
[Name (English / local (abbreviation))]: Irish Skeptics Society
[Founded]: 2002
[Region served]: Ireland
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Italian Committee for the Investigation of Claims of the Pseudosciences / Comitato Italiano per il Controllo delle Affermazioni sulle Pseudoscienze (CICAP)
[Founded]: 1989
[Region served]: Italy
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: James Randi Educational Foundation (JREF)
[Founded]: 1996
[Region served]: United States
[Notes]: -
[Name (English / local (abbreviation))]: Launceston Skeptics
[Founded]: 2010
[Region served]: Australia
[Notes]: -
[Name (English / local (abbreviation))]: Latvian Skeptics Society / Latvijas Skeptiskā Biedrība
[Founded]: 2012
[Region served]: Latvia
[Notes]: -
[Name (English / local (abbreviation))]: Lithuanian Skeptics Society / Lietuvos skeptikų draugija (LSD)
[Founded]: 2011
[Region served]: Lithuania
[Notes]: -
[Name (English / local (abbreviation))]: Maharashtra Committee for Eradication of Blind Faith / Maharashtra Andhashraddha Nirmoolan Samiti (MANS)
[Founded]: 1989
[Region served]: India
[Notes]: Member of FIRA. -
[Name (English / local (abbreviation))]: Merseyside Skeptics Society (MSS)
[Founded]: 2009
[Region served]: United Kingdom
[Notes]: -
[Name (English / local (abbreviation))]: MTÜ Eesti Skeptik (skeptik.ee)
[Founded]: 2007
[Region served]: Estonia
[Notes]: -
[Name (English / local (abbreviation))]: Network of Independent Danish Skeptics / Skeptica
[Founded]: 1997
[Region served]: Denmark
[Notes]: -
[Name (English / local (abbreviation))]: New England Skeptical Society (NESS)
[Founded]: 1996
[Region served]: United States
[Notes]: Fusion of three earlier organisations. -
[Name (English / local (abbreviation))]: New Mexicans for Science and Reason (NMSR)
[Founded]: 1990
[Region served]: United States
[Notes]: -
[Name (English / local (abbreviation))]: New Zealand Skeptics (NZ Skeptics)
[Founded]: 1986
[Region served]: New Zealand
[Notes]: -
[Name (English / local (abbreviation))]: Office for Science and Society (OSS)
[Founded]: 1999
[Region served]: Canada
[Notes]: McGill University, Montreal -
[Name (English / local (abbreviation))]: Philadelphia Association for Critical Thinking (PhACT)
[Founded]: 1994
[Region served]: United States
[Notes]: -
[Name (English / local (abbreviation))]: Philippine Atheists and Agnostics Society (PATAS)
[Founded]: 2011
[Region served]: Philippines
[Notes]: -
[Name (English / local (abbreviation))]: Polish Skeptics Club / Klub Sceptyków Polskich (KSP)
[Founded]: 2010
[Region served]: Poland
[Notes]: -
[Name (English / local (abbreviation))]: Portuguese Skeptical Community / Comunidade Céptica Portuguesa (COMCEPT)
[Founded]: 2012
[Region served]: Portugal
[Notes]: -
[Name (English / local (abbreviation))]: Rational Alternative to Pseudoscience - Society for the Advancement of Critical Thinking /Alternativa Racional a las Pseudociencias - Sociedad para el Avance del Pensamiento Crítico (ARP-SAPC)
[Founded]: 1986
[Region served]: Spain
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Rationalist Union / Union Rationaliste
[Founded]: 1930
[Region served]: France
[Notes]: -
[Name (English / local (abbreviation))]: Rationalist Universe / Universo Racionalista
[Founded]: 2012
[Region served]: Brazil
[Notes]: -
[Name (English / local (abbreviation))]: Richard Dawkins Foundation for Reason and Science (RDFRS)
[Founded]: 2006
[Region served]: UK & US
[Notes]: The American and British branches are independent. -
[Name (English / local (abbreviation))]: Round Earth Society / Sociedade da Terra Redonda (STR)
[Founded]: 1999
[Region served]: Brazil
[Notes]: -
[Name (English / local (abbreviation))]: Science and Popular Enlightenment / Föreningen Vetenskap och Folkbildning (VoF)
[Founded]: 1982
[Region served]: Sweden
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Science and Rationalists' Association of India / Bharatiya Bigyan O Yuktibadi Samiti
[Founded]: 1985
[Region served]: India
[Notes]: Based in Kolkata, West Bengal. -
[Name (English / local (abbreviation))]: SKEPP
[Founded]: 1990
[Region served]: Belgium
[Notes]: Member of ECSO. Serves Flanders and Brussels. -
[Name (English / local (abbreviation))]: Skepsis ry
[Founded]: 1987
[Region served]: Finland
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Skepsis Foundation / Stichting Skepsis (Skepsis)
[Founded]: 1987
[Region served]: Netherlands
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Skeptical Circle / Círculo Escéptico (CE)
[Founded]: 2006
[Region served]: Spain
[Notes]: Member of ECSO. -
[Name (English / local (abbreviation))]: Skeptic Society / Общество скептиков
[Founded]: 2013
[Region served]: Russia
[Notes]: -
[Name (English / local (abbreviation))]: Society for the Scientific Investigation of Parasciences / Gesellschaft zur wissenschaftlichen Untersuchung von Parawissenschaften (GWUP)
[Founded]: 1987
[Region served]: D-A-CH
[Notes]: Based in Roßdorf, Germany. Member of ECSO. -
[Name (English / local (abbreviation))]: The Skeptics Society
[Founded]: 1992
[Region served]: United States
[Notes]: Globally active, but mainly serves California -
[Name (English / local (abbreviation))]: Young Australian Skeptics (YAS)
[Founded]: 2008
[Region served]: Australia
[Notes]: -
[Name (English / local (abbreviation))]: Young Skeptics
[Founded]: 2015
[Region served]: US
[Notes]: The American after school program -
[Name (English / local (abbreviation))]: Zetetic Observatory / Observatoire Zététique (OZ)
[Founded]: 2003
[Region served]: France
[Notes]: -
[Name (English / local (abbreviation))]: The skeptics of Quebec / Les Sceptiques du Québec
[Founded]: 1987
[Region served]: Quebec
[Notes]: -
[Name (English / local (abbreviation))]: AECH / Asociación Escéptica de Chil
[Founded]: 2010
[Region served]: Chile
[Notes]: -
[Name (English / local (abbreviation))]: APRA / Asociación Paraguaya Racionalista
[Founded]: 2006
[Region served]: Paraguay
[Notes]: -
[Name (English / local (abbreviation))]: CEA / Círculo Escéptico Argentino
[Founded]: ??
[Region served]: Argentina
[Notes]: ` -
[Name (English / local (abbreviation))]: Asociación Racional Escéptica de Venezuela
[Founded]: 2004
[Region served]: Venezuela
[Notes]: -
[Name (English / local (abbreviation))]: Skepsis
[Founded]:
[Region served]: Norway
[Notes]: -
[Name (English / local (abbreviation))]: EC / Escépticos Colombia
[Founded]: 2010
[Region served]: Colombia
[Notes]:
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