The National Mall is a landscaped park near the downtown area of Washington, D.C., the capital city of the United States. It contains and borders a number of museums of the Smithsonian Institution, art galleries, cultural institutions, and memorials, sculptures, and statues. It is administered by the National Park Service (NPS) of the United States Department of the Interior as part of the National Mall and Memorial Parks unit of the National Park System. The park receives approximately 24 million visitors each year. Designed by Pierre L'Enfant, the "Grand Avenue" or Mall was to be a democratic and egalitarian space—unlike palace gardens, such as those at Versailles in France, that were paid for by the people but reserved for the use of a privileged few.

The core area of the National Mall extends between the United States Capitol grounds to the east and the Washington Monument to the west and is lined to the north and south by several museums and federal office buildings. The term National Mall may also include areas that are officially part of neighboring West Potomac Park to the south and west and Constitution Gardens to the north, extending to the Lincoln Memorial on the west and Jefferson Memorial to the south.

The National Mall proper contains the following landmarks, museums and other features (including opening year):

Not marked on the above image:

With the exception of the National Gallery of Art, all of the museums on the National Mall proper are part of the Smithsonian Institution. The Smithsonian Gardens maintains a number of gardens and landscapes near its museums. These include:

Features east of the National Mall proper include:

Not included in the above map:

In its 1981 National Register of Historic Places nomination form, the NPS defined the boundaries of the National Mall (proper) as Constitution and Pennsylvania Avenues on the north, 1st Street NW on the east, Independence and Maryland Avenues on the south, and 14th Street NW on the west, with the exception of the section of land bordered by Jefferson Drive on the north, Independence Avenue on the south, and by 12th and 14th Streets respectively on the east and west, which the U.S. Department of Agriculture administers and which contains the Jamie L. Whitten Building (U.S. Department of Agriculture Administration Building). The 2012–2016 National Park Service index describes the National Mall as being a landscaped park that extends from the Capitol to the Washington Monument, defined as a principal axis in the L'Enfant Plan for the city of Washington.