Worldwide Bi-Metallic Collectors Club 
(WBMCC) Worldwide organization of individuals collecting bi-metallic coins. Site contains many images and a variety of good information regarding bi-metallics.
The American Numismatic Society
The ANSociety maintains an extensive collection of coins, paper money and medals and promotes all aspects of numismatic research and learning. In addition, the ANS libraray holds the most comprehensive collection of numismatic literature in the world.
British Numismatic Society
Established to encourage and promote the science of numismatics, through the study of the coins, medals, tokens and banknotes of the peoples of the British Isles and Commonwealth, the United States of America, and all territories that at any time have been subject to British jurisdiction.
COINAF
Organization of dealers and collectors committed to the promotion of fair and honest trade of numismatic items on the internet and to the education of consumers in the study of numismatics and fair trade practices.
CoinMasters
An interactive world-wide online numismatic club which focuses on all aspects of coin collecting. The web site is a huge warehouse for numismatic ideas and information contributed freely by members world-wide.
Encased Collectors International
A dues free club open to all who collect or trade in encased, bi-metal coins and tokens along with silver strikes.
Hellenic Numismatic Society
Serves the interests of Greek and foreign numismatists and collectors of Greek coins, banknotes, tokens, medals and decorations. Includes a council directory, membership details and a list of publications.
International Association of Professional Numismatists
A non-profit organization of the leading international numismatic firms. The object of the association is development of numismatic trade conducted according to the highest standards of business ethics.
International Numismatic Commission
An organization of museums, university, institutes, numismatic societies, and mints pledged to facilitate cooperation between scholars and between institutions in the field of numismatics and related disciplines. (French and English)
Numismatics International
Encouraging and promoting the science of numismatics by specializing in areas and nations other than the United States.
Oriental Numismatic Society
Supports the study and collection of oriental coinage, from North Africa to the Far East. Includes news, event schedule, articles, and membership application.
World Internet Numismatic Society
A worldwide internet based numismatic club. Offering an mail swap/trade list and a discussion list.
Worldwide Holey Tokens and Coins Collectors Club
(WHTCCC) Collectors interested in holed coins and tokens.
