Largest aerospace museum
National Air and Space Museum
60,000 total number
Vereinigte Staaten (Washington)

The world's largest aerospace museum is the National Air and Space Museum of the Smithsonian Institution, which is located on the National Mall in Washington D.C., with a substantial annex (the Steven F. Udvar-Hazy Center) located near Washington Dulles Airport in Chantilly, Virginia. As of April 2021, the museum's collection comprises around 60,000 artifacts (including complete aircraft and spacecraft, as well as smaller items such as engines, uniforms and spacesuits) and 20,000 cubic feet of archival material.

Items on display at the Smithsonian include the original Wright Flyer, Charles Lindbergh's Spirit of St Louis, the Apollo 11 command module, and the Space Shuttle Discovery. The Smithsonian has 61 aircraft in the main museum, 182 at the Steven F. Udvar-Hazy Center and another 74 at a storage facility in Maryland. The next largest aerospace museums – the Imperial War Museum Duxford (UK), Militärhistorisches Museum Flugplatz Berlin-Gatow (DEU), Chinese Aviation Museum (CHN) and the Central Air Force Museum (RUS) all have significantly smaller collections, with only up to 200 aircraft.