Smithsonian National Postal Museum

The Smithsonian National Postal Museum is devoted to the history of America’s mail service and the hobby of stamp collecting. The museum, created by an agreement between the Smithsonian and the United States Postal Service, holds in its collection the National Philatelic Collection with more than 5.9 million objects. It is located in the historic City Post Office Building next to Washington's Union Station.


Open to the Public

Opening Date

Website Visitors
Fiscal Year-to-Date

In-Person Visits
Fiscal Year-to-Date

In-Person Visits, Historical


Website Visitors


Collections Objects & Specimens


On-Site Volunteers


Peer-Reviewed Research Publications, Historical


Museum Objects & Specimens
Represented by Digital Image

Private Funds Raised, Historical