The National Postal Museum Library is one of twenty specialized libraries in the Smithsonian Institution Libraries system. The National Philatelic Collection was the basis of the Library when it was established in 1993. Now, with more than 40,000 books, journals, catalogues and archival documents, the National Postal Museum Library is among the world's largest postal history and philatelic research facilities.
Although the resources at the National Postal Museum Library focus on the postal history and philately of the United States, the collections are international in scope.
- More than 6,000 books, 7,000 serials, manuscripts, photographs and many auction and stamp catalogues
Archival holdings include files of:
- Third Assistant Postmaster General
- Highway Post Office
- Aerial Mail Service
- Railway Mail Service
- Panama Canal Zone Post Office
Private collections include those of:
- Thaddeus Hyatt
- Frederick Melville
- George Turner
Rare book collection includes:
- J.W. Scott & Co. Monthly Price List
- Annotated copies of the Catalogue of the Philatelic Library of the Earl of Crawford, K.T.
- Catalogue of the Royal Philatelic Collection.