The National Coalition to Save Our Mall is a national, not-for-profit education and research organization working to preserve the National Mall as the Monument to Democracy it is intended to be.

The National Capital Planning Commission provides overall planning guidance for federal land and buildings in the National Capital Region, which includes the District of Columbia; the city of Alexandria; Prince George's and Montgomery Counties in Maryland; Arlington, Fairfax, Prince William, and Loudoun Counties in Virginia; and the cities and towns within these counties.

The D.C. Preservation League. The mission of the D.C. Preservation League is to preserve, protect, and enhance the historic built environment of Washington, D.C., through advocacy and education.

The DC Office of Planning provides Development Review, Historic Preservation, Neighborhood Revitalization Planning and Planning & Design Information Technology for the District government.

The Advisory Council on Historic Federal Preservation, an independent Federal agency created by the National Historic Preservation Act of 1966 (NHPA), is the major policy advisor to the Government in the field of historic preservation.

National Park Service: Heritage Preservation: Heritage Preservation Services. A web site offering information on preservation planning, grants, tax credits, training, news, mapping and legislation.

The National Trust for Historic Preservation, chartered by Congress in 1949, is a private, nonprofit organization dedicated to protecting historic resources. It fights to save historic buildings and the neighborhoods and landscapes they anchor through education and advocacy.

The American Battle Monuments Commission is an independent agency of the Executive Branch of the federal government, responsible for commemorating the services of the American Armed Forces.

The League of Historic American Theaters (LHAT) is a national member service organization which supports and facilitates the rescue, restoration, and reuse of historic theaters.