Society of Cartographers - Society founded in 1964 aiming to support the practising cartographer and encourage and maintain a high standard of cartographic illustration. - http://www.soc.org.uk/
North American Cartographic Information Society - NACIS is a professional society dedicated to the advancement and cooperation of all cartographic disciplines. Members include practicing cartographers, educators, map librarians, and map collectors. - http://www.nacis.org/
Mt. Diablo Surveyors Historical Society - Society of Land Surveyors interested in tne history of Mount Diablo, Northern California, and the establishment of the Mt. Diablo meridian and initial point. - http://www.mdshs.org/
Australian Map Circle - The Australian Map Circle (AMC) is a national group of map producers, users and curators, which acts as a medium of communication for all those interested in maps. - http://australianmapcircle.org.au/
Washington Map Society - An informal organization of people interested in cartography, cartographic history, and collecting maps, both old and new. - http://www.washmap.org/
Ordnance Survey Britain's National Mapping Agency - Maps and mapping for Great Britain, with free mapping and services together with information on digital and paper mapping products and other aspects of cartography - http://www.ordnancesurvey.com
The British Cartographic Society - an association of individuals and organisations dedicated to exploring and developing the world of maps - http://www.cartography.org.uk/
International Map Trade Association (IMTA) - IMTA members are the companies that create and sell the maps, atlases and map-related products you use. Find information on maps, geography and mapping technology. - http://www.maptrade.org/
MapHist Discussion Group - MapHist, the Map History Discussion List, is an e-mail discussion group whose primary focus is historical maps, atlases, globes and other cartographic documents. - http://www.maphist.nl/