List of skeptical organizations
This is a list of notable organizations that promote or practice scientific skepticism.
| Name | Founded | Region served | Notes |
| Association against Quackery / Vereniging tegen de Kwakzalverij | 1881 | Oldest skeptical organisation. Member of ECSO. | |
| Association for Skeptical Enquiry | 1997 | Member of ECSO. | |
| Australian Skeptics | 1980 | ||
| Brazilian Society of Skeptics and Rationalists / Sociedade Brasileira de Céticos e Racionalistas | 2001 | ||
| Center for Inquiry | 1991 | World | Global umbrella organisation based in Amherst, New York. |
| Committee for the Advancement of Scientific Skepticism | 2010 | Part of Centre for Inquiry Canada. | |
| Committee for Skeptical Inquiry, formerly Committee for the Scientific Investigation of Claims of the Paranormal | 1976 | Part of the Center for Inquiry. | |
| Committee Para / Comité Para | 1949 | Member of ECSO. Serves Wallonia and Brussels. | |
| Czech Skeptics Club Sisyfos / Český klub skeptiků Sisyfos | 1995 | Member of ECSO. | |
| Dakshina Kannada Rationalist Association / தட்சிண கன்னட பகுத்தறிவாளர் ஒன்றியம் | 1976 | Member of FIRA. | |
| The Free Thought / De Vrije Gedachte | 1856 | Focuses on atheism/secular humanism. | |
| Edinburgh Skeptics Society | 2009 | ||
| European Council of Skeptical Organisations | 1994 | European umbrella organisation, based in Roßdorf, Germany. | |
| Federation of Indian Rationalist Associations / இந்திய பகுத்தறிவாளர் ஒன்றியங்களின் பேரவை | 1997 | Indian umbrella organisation. | |
| Freedom From Religion Foundation | 1978 | Focuses on state/church separation, nontheism, and atheism. | |
| French Association for Scientific Information / Association française pour l’information scientifique | 1968 | Member of ECSO. | |
| German Society for Fighting Quackery / Deutsche Gesellschaft zur Bekämpfung des Kurpfuschertums | 1903 | Dissolved in 1934. | |
| Glasgow Skeptics | 2009 | ||
| Good Thinking Society | 2012 | ||
| Het Denkgelag | 2012 | ||
| Hungarian Skeptic Society / Szkeptikus Társaság | 2006 | Member of ECSO. | |
| Independent Investigations Group | 2000 | ||
| Indian CSICOP | 19?? | Affiliated with CSI, member of FIRA. | |
| Indian Rationalist Association | 1949 | Member of Rationalist International. | |
| Irish Skeptics Society | 2002 | Member of ECSO. | |
| Italian Committee for the Investigation of Claims of the Pseudosciences / Comitato Italiano per il Controllo delle Affermazioni sulle Pseudoscienze | 1989 | Member of ECSO. | |
| James Randi Educational Foundation | 1996 | ||
| Launceston Skeptics | 2010 | ||
| Latvian Skeptics Society / Latvijas Skeptiskā Biedrība | 2012 | ||
| Lithuanian Skeptics Society / Lietuvos skeptikų draugija | 2011 | ||
| Maharashtra Committee for Eradication of Blind Faith / Maharashtra Andhashraddha Nirmoolan Samiti | 1989 | Member of FIRA. | |
| Merseyside Skeptics Society | 2009 | ||
| MTÜ Eesti Skeptik | 2007 | ||
| Network of Independent Danish Skeptics / Skeptica | 1997 | ||
| New England Skeptical Society | 1996 | Fusion of three earlier organisations. | |
| New Mexicans for Science and Reason | 1990 | ||
| New Zealand Skeptics | 1986 | ||
| Office for Science and Society | 1999 | McGill University, Montreal | |
| Philadelphia Association for Critical Thinking | 1994 | ||
| Philippine Atheists and Agnostics Society | 2011 | ||
| Polish Skeptics Club / Klub Sceptyków Polskich | 2010 | ||
| Portuguese Skeptical Community / Comunidade Céptica Portuguesa | 2012 | ||
| Rational Alternative to Pseudoscience - Society for the Advancement of Critical Thinking / Alternativa Racional a las Pseudociencias - Sociedad para el Avance del Pensamiento Crítico | 1986 | Member of ECSO. | |
| Rationalist Union / Union Rationaliste | 1930 | ||
| Rationalist Universe / Universo Racionalista | 2012 | ||
| Richard Dawkins Foundation for Reason and Science | 2006 | & | The American and British branches are independent. |
| Round Earth Society / Sociedade da Terra Redonda | 1999 | ||
| Science and Popular Enlightenment / Föreningen Vetenskap och Folkbildning | 1982 | Member of ECSO. | |
| Science and Rationalists' Association of India / Bharatiya Bigyan O Yuktibadi Samiti | 1985 | Based in Kolkata, West Bengal. | |
| SKEPP | 1990 | Member of ECSO. Serves Flanders and Brussels. | |
| Skepsis ry | 1987 | Member of ECSO. | |
| Skepsis Foundation / Stichting Skepsis | 1987 | Member of ECSO. | |
| Skeptical Circle / Círculo Escéptico | 2006 | Member of ECSO. | |
| Skeptic Society / Общество скептиков | 2013 | ||
| Society for the Scientific Investigation of Parasciences / Gesellschaft zur wissenschaftlichen Untersuchung von Parawissenschaften | 1987 | D-A-CH | Based in Roßdorf, Germany. Member of ECSO. |
| The Skeptics Society | 1992 | Globally active, but mainly serves California | |
| Young Australian Skeptics | 2008 | ||
| Young Skeptics | 2015 | The American after school program | |
| Zetetic Observatory / Observatoire Zététique | 2003 | ||
| The skeptics of Quebec / Les Sceptiques du Québec | 1987 | ||
| AECH / Asociación Escéptica de Chil | 2010 | ||
| APRA / Asociación Paraguaya Racionalista | 2006 | ||
| CEA / Círculo Escéptico Argentino | ?? | ` | |
| Asociación Racional Escéptica de Venezuela | 2004 | ||
| Skepsis | |||
| EC / Escépticos Colombia | 2010 |