OrigamiUSA

Membership information, upcoming events, model index, affiliate directory, e-mail list, lending library, diagrams, and online store.
http://www.origami-usa.org/

West Coast Origami Guild

Los Angeles, CA - Subscription information for its newsletter, and list of clubs in CA, WA, and OR.
http://www.folds.net/wcog/

Bay Area Rapid Folders (BARF)

San Francisco, CA - Membership and newsletter back issue information, diagrams, gallery, and animations.
http://www.barf.cc/

Carnegie Mellon University Origami Club

Pittsburg, PA - Upcoming events, photos from a past exhibit, newsletter information, and local stores that carry books and supplies, and books in local libraries.
http://www.contrib.andrew.cmu.edu/usr/origami/home.html

Triangle Origami Folders United (TOFU)

Raleigh, NC - Location, schedule, e-mail mailing list information, and photos from past meetings.
http://mette.pederson.com/TOFU.htm

Origami-L

The Origami Interest Group mailing list. FAQ, diagrams, archive of past messages, software programs, articles, gallery of people and models, history, book reviews, and model database.
http://origami.KVI.nl/

British Origami Society

The society has over 600 members worldwide, publishes a bimonthly magazine, and has a unique library. Page includes diagrams, articles on theory and practice, and photo gallery.
http://www.britishorigami.org.uk/

OrigaMIT

Cambridge, MA - Location and upcoming meetings, mailing list archive, club constitution, and links to member pages.
http://web.mit.edu/origamit/

Chicago Area Origami Society (CHAOS)

Chicago, IL - Location with map, articles, local stores, book list, and gallery.
http://home.earthlink.net/~robertcubie/origami/chaos.html