National Historic Site (NHS) and National Historical Park (NHP) are designations for officially recognized areas of national historic significance in the United States. They are usually owned and managed by the federal government. An NHS usually contains a single historical feature directly associated with its subject, while an NHP is an area that generally extends beyond single properties or buildings to include a mix of historic and later structures and sometimes significant natural features.

The National Park Service (NPS) is an agency of the United States federal government, within the U.S. Department of the Interior. The service manages all national parks; most national monuments; and other natural, historical, and recreational properties, with various title designations. The United States Congress created the agency on August 25, 1916, through the National Park Service Organic Act. Its headquarters are in Washington, D.C., within the main headquarters of the Department of the Interior.