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.
Resources found in the Smithsonian National Postal Museum Library are:
Woodward, A.M. Tracey. The Postage Stamps of Japan and Dependencies. London: Harris Publications (1928). HE6185.J3W89 1928X v. 1 – 2.