The following links below are sites which the Philatelic Foundation recommends for further research and information on philately. The internet is a hotbed of active information which constantly changes and advances the research of philately. Contents of the following pages are out of the control of the Philatelic Foundation and are just additional tools for collectors.
- American Philatelic Society: With nearly 34,000 members in more than 110 countries, the APS is the largest, non-profit organization for stamp collectors in the world. Founded in 1886, the APS serves collectors, educators, postal historians, and the general public by providing a wide variety of programs and services.
- The Collectors Club, New York: 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. Founded in 1896, the Club counted among its members the leading—even legendary—names in philately.
- Collectors Club of Chicago: The Collectors Club of Chicago (CCC) was founded in 1928 with its primary objective in the documentation, preservation, advancement and promotion of philately through education, study research and services.
- U.S. Philatelic Classics Society: The U. S. Philatelic Classics Society (USPCS) is a not-for-profit 501(c)(3) association of people interested in the pre-1894 stamps and postal history of the United States. The goal of the USPCS is to promote interest and knowledge of philately through the encouragement of philatelic research, and through exchange of information among our members as well with other philatelic organizations.
- United States Stamp Society: The United States Stamp Society (USSS) is the preeminent organization devoted to the study of United States stamps. It is, “a non-profit, volunteer-run association of collectors to promote the study of the philatelic output of the Bureau of Engraving and Printing and of postage and revenue stamped paper produced by others for use in the United States and U.S. administered areas.”
- United Postal Stationery Society: Formed in 1945, the United Postal Stationery Society is a group of nearly 900 philatelists devoted to the collection, research, and promotion of worldwide Postal Stationery.
- Carriers and Locals Society: Established in 1991, The Carriers and Locals Society is a not-for-profit association of people interested in the carriers, local posts, independent mails and Eastern expresses of the 19th century, their stamps and postal history.
- American Revenue Association: Founded in 1947, the ARA is a non-profit corporation serving the needs and interests of ALL collectors of revenues, tax stamps, stamped paper, telegraph and railroad stamps, and general non-postal Back-of-the-Book material, U. S. and foreign, federal, state, provincial, local, municipal and private.
- The Royal Philatelic Society London: The Royal is the oldest philatelic society in the world. Established in 1869, there are over 1150 overseas members, almost 900 members in the United Kingdom, and our libraries, collections and archives go back to the beginning of the postage stamp and beyond.
- Institute for Analytical Philately: The Institute for Analytical Philately, Inc. is a nonprofit corporation dedicated to sponsoring technical research activities to better the stamp collecting hobby. To facilitate this, IAP provides Research Grants and technical support to qualified philatelists to assist them in performing their valuable work.
- PhilaMercury: The purpose of this site is to provide a permanent census of United States cover images and descriptions in a single, searchable database. This will be accomplished with the participation of collectors and dealers willing to share the covers they own, or have available for sale.
- 1847 USA: 1847usa.com was designed to aid collectors in their identification of U.S. stamps.
- Swedish Tiger: Created and designed to assist collectors in U.S. stamp identification, pricing and much more.
- Smithsonian National Postal Museum: The official site of the Smithsonian National Postal Museum in Washington, D.C.