International Society for Eighteenth-Century Studies
http://www.isecs.org/isecs_sieds/_pages_english/toc.htm

American Society for Eighteenth-Century Studies:
http://asecs.press.jhu.edu/

British Society for Eighteenth-Century Studies
http://www.bsecs.org.uk/

Canadian Society for Eighteenth-Century Studies
http://www.c18.org/scedhs-csecs/

Deutsche Gesellschaft für die Erforschung des 18. Jahrhunderts:
http://dgej.hab.de/

Eighteenth-Century Ireland Society
http://www.mic.ul.ie/ecis/Welcome.htm

Finnish Society for Eighteenth-Century Studies
http://www.helsinki.fi/historia/1700/

Norwegian Society for Eighteenth-Century Studies
http://www.hf.uio.no/1700/

Österreichische Gesellschaft zur Erforschung des 18. Jahrhunderts
http://www.oege18.org

Polish Society for Eighteenth-Century Studies
http://www.wiekosiemnasty.pl/

Sociedad Española de Estudios del Siglo XVIII
http://www.siglo18.org/index.htm

Società Italiana di Studi sul Secolo XVIII:
http://www.lett.unipmn.it/ospiti/SocXVIII/

Société Française d’Etude du Dix-Huitième siècle:
http://docsrvr.ish-lyon.cnrs.fr/sfeds/

Werkgroep 18e Eeuw
http://www.18e-eeuw.nl/