Philatelic and History Museums
USA:
- Wells Fargo Museums and Historical Services, San Francisco, CA, USA
- National Airmail Museum, Fort Wayne, IN, USA
- The Historic Rail Park and Train Museum, Bowling Green, KY, USA
- College Park Aviation Museum, College Park, MD, USA
- Pony Express Museum, St. Joseph, MO, USA
- North Carolina Transportation Museum, Spencer, NC, USA
- Spellman Museum of Stamps and Postal History, Weston, MA, USA
- Post Mark Museum, Bellview, OH, USA
- The Delphos Museum of Postal History, Delphos, OH, USA
- National Museum of the U.S. Air Force, Wright-Patterson AFB, OH, USA
- Evergreen Aviation and Space Museum, McMinnville, OR, USA
- Museum of Flight, Seattle, WA, USA
International
- Museu Postal, Andorra La Vella, Andorra
- Museu Nacional dos Correios, Brasília, Brazil
- Museu Tempostal, Salvador, Brazil
- Bhutan Postal Museum
- Toronto's First Post Office Museum, Toronto, Canada
- Shanghai Postal Museum, Shanghai, China
- Postal Museum, Prague, Czech Republic
- Enigma Museum for Post, Tele & Kommunikation, Copenhagen, Denmark
- The Post Museum, Cairo, Egypt
- National Postal Museum, Addis Ababa, Ethiopia
- Postimuseo, Tampere, Finland
- Musée de la Carte Postale, Baud, France
- Le Musée de la Poste, Paris, France
- Philatelic and Postal Museum, Athens, Greece
- Museum für Kommunikation, Berlin, Germany
- Museum für Kommunikation, Frankfurt, Germany
- Museum für Kommunikation, Nürnberg, Germany
- Postamúzeum, Budapest, Hungary
- Postal and Philatelic Museum, Tel Aviv, Israel
- Museo dei Tasso e della Storia Postale, Camerata Cornello, Italy
- Museo Postale e Telegrafico della Mitteleuropa, Trieste, Italy
- Philatelic Museum, Tokyo, Japan
- Postal Museum Japan, Tokyo, Japan
- Malta Postal Museum
- Mauritius Postal Museum, Port Louis, Mauritius
- Museo de Filatelia, Oaxaca, México
- Musée des Timbres et des Monnaies, Monaco
- Norges Postmuseum, Lillehammer, Norway
- Korean Stamp Museum, Pyongyang, North Korea
- Museo Postal y Filatélico del Perú
- Post and Telecommunications Museum, Wroclaw, Poland
- Museum of Communications, Lisbon, Portugal
- Arab Postal Stamp Museum, Doha, Qatar
- Muzeul National Filatelic, Bucuresti, Romania
- A.S. Popov Central Museum of Communications, Saint Petersburg, Russia
- South African Post Office Museum, Pretoria, South Africa
- Postal Museum of Korea, Cheonan, South Korea
- Museo Postal y Telegráfico, Madrid, Spain
- Postmuseum, Stockholm, Sweden
- Museum of Communication, Bern, Switzerland
- The Olympic Museum, Lausanne, Switzerland
- Chunghwa Postal Museum, Taipei, Taiwan
- Thai Philatelic Museum, Bangkok, Thailand
- British Library Philatelic Collections, London, United Kingdom
- The Postal Museum, London, United Kingdom
Non-profit Philatelic and Postal History Societies
- American Philatelic Society
- Operation Gratitude
- The Royal Philatelic Society of Canada
- U.S. Philatelic Classics Society
- United States Stamp Society
State Postal History Societies:
- Alaska Collectors Club
- Postal History Foundation, Tucson, Arizona
- Colorado Postal History Society
- Dakota Postal History Society
- Empire State Postal Historical Society
- Florida Postal History Society
- Hawaiian Philatelic Society
- Illinois Postal History Society
- Maine Philatelic Society
- Stamps Minnesota
- Missouri: MoPhil.org
- New Jersey Postal History Society
- North Carolina Postal History Society
- Ohio Postal History Society
- Pennsylvania Postal Historian
- Western Cover Society
Philatelic and Postal History Archives and Libraries
USA:
- Postal History Foundation, Tucson, AZ
- Western Philatelic Library, Sunnyvale, CA
- Rocky Mountain Philatelic Library, Denver, CO
- Northwest Philatelic Library, Portland, OR
- American Philatelic Research Library, Bellefonte, PA
- The Wineburgh Philatelic Research Library, Richardson, TX
- National Archives and Records Administration (NARA) Record Group #28 (Post Office Department), Washington, DC
- Smithsonian National Postal Museum Library, Washington, DC
International:
