American First Day Cover Society
Noncommercial organization devoted to the collecting and advancement of First Day Covers.
www.afdcs.org
British North America Philatelic Society (BNAPS)
Devoted to the collector and researcher of the stamps, postal markings, and postal history of Canada, the pre-Confederation colonies, and Newfoundland.
www.bnaps.org
Junior Philatelists of America
National youth stamp collectors organization run by and for young people.
www.jpastamps.org
Postmark Collectors Club
National organization encouraging collection of postmarks and postal history. Hosts museum in Ohio and annual national convention.
www.postmarks.org
Australian Philatelic Society (APS)
Dedicated to the research, study, publication, and display of all aspects of philately and postal history, both of Australia and its States, and worldwide.
aps.org.au
American Philatelic Foundation
Nonprofit organization offering stamp appraisals and other services.
www.americanphilatelic.com
Anglo-Boer War Philatelic Society
Leads the study of the postal history and usages of the second Anglo-Boer War 1899-1902.
www.boerwarsociety.org
National Duck Stamp Collectors Society
Stamp collecting society devoted exclusively to duck stamps. Promotes and encourages the collecting and study of migratory waterfowl hunting and conservation stamps.
www.hwcn.org/link/ndscs
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