Due to the Metrorail shutdown March 16, our D.C. museums will open at noon, except the Smithsonian American Art Museum, National Portrait Gallery, Udvar-Hazy Center, and National Zoo which will open on time. The Castle will open at 10:30 a.m.
Skip navigationDevoted to the history of America's mail service and the hobby of stamp collecting.
Highlights William H. Gross Stamp Gallery, the world’s largest stamp gallery; full-size, Freightliner semi-truck cab cutaway; three vintage mail planes; stagecoach; 1931 Ford Model A postal truck; replica of a railway car; videos; computer interactives; and hands-on, family-friendly activities
Hours
10 a.m.–5:30 p.m. daily
Closed December 25
Admission is FREE
Information
202-633-1000 (voice/tape)
info@si.edu
Free visitor Wi-Fi