The United States Park Police (USPP) is one of the oldest uniformed federal law enforcement agencies in the United States. It functions as a full-service law enforcement agency with responsibilities and jurisdiction in those National Park Service areas primarily located in the Washington, D.C., San Francisco, and New York City areas and certain other government lands. The United States Park Police is one of the few full-service police departments in the federal government that possess both state and federal authority.
In addition to performing the normal crime prevention, investigation, and apprehension functions of an urban police force, the Park Police are responsible for policing many of the famous monuments in the United States. The USPP shares law enforcement jurisdiction in all lands administered by the National Park Service with a force of National Park Service Rangers tasked with the same law enforcement powers and responsibilities. The agency also provides protection for the President, Secretary of the Interior, and visiting dignitaries. The Park Police is a unit of the National Park Service, which is a bureau of the Department of the Interior.