Open daily 10 a.m. to 5:30 p.m.
Admission is always free!
2 Massachusetts Ave., N.E.
Washington, DC 20002
The museum's main entrance is located on the corner of First Street and Massachusetts Avenue NE. Other entrances have variable hours.
The answers to frequently asked questions about the National Postal Museum and about US Postal Service history can be found at: FAQs.
To contact the museum about this website, please send an email to: NPMWeb@si.edu