The American Topical Association (ATA) was founded in 1949 and is now the largest philatelic society devoted specifically to topical stamp collecting.

The Collectors Club is a group of more than 750 people who have come together to further the study of philately, promote the hobby and provide a social, educational, and non-commercial setting for the enthusiastic enjoyment of our common passion.

The American Stamp Dealers Association is a professional organization serving philately since 1914. We are dedicated to promoting integrity, honesty and reliability, and we are the hobby builders of philately.

With nearly

The American Stamp and Coin Foundation is a non-profit, 501-3C organization, serving the public now for thirty years.

The primary purpose of the National Duck Stamp Collectors Society (NDSCS) is to promote and encourage the collecting and study of migratory waterfowl hunting and conservation stamps.

The Graphics Philately Association is an informal, non-profit organization of people who have a mutual interest in the history of graphic communications as represented on stamps and other philatelic materials.

The Society is organized to promote the collecting of stamps and the study of the postal history of

The Society of Israel Philatelists (SIP) was founded in New York City shortly after Israel became a sovereign state in 1948. The SIP is devoted to the philately of the Holy Land, Israel and Judaica.

Our society is devoted to all aspects of Possessions philatelty. It is a non-profit organization founded in 1978 with 17 charter members.