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.
Postal stationery includes any paper item with a prepaid printed monetary value that is meant to be sent through the post. Stamped envelopes, postal cards, letter sheets, wrappers - all of these are examples of postal stationery.