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 Post Office Department issued souvenir sheets of the 1c Yosemite stamp for the 1934 stamp show in Omaha, Nebraska.