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.
As demands on city post offices changed, so did this building.
1911: Construction of the post office next to the new city train station begins.
1914: On September 14, the Washington City Post Office opens for business.
1935: The building is expanded with the help of Federal funds intended to boost the nation’s depressed economy.
1957-59: The post office is modernized to improve mail handling, communications, and customer service.
1971: A second burst of modernization, including Formica counters and a dropped ceiling, increases usability for visitors but covers much of the original architecture.
1986: To accommodate larger postal volumes, a mail processing plant is built two miles north. A scaled-down post office reopens downstairs.
1989: Renovation begins to make way for federal offices and the National Postal Museum.