Federal lands are lands in the United States owned and managed by the federal government.[1] Pursuant to the Property Clause of the United States Constitution (Article 4, section 3, clause 2), Congress has the power to retain, buy, sell, and regulate federal lands, such as by limiting cattle grazing on them. These powers have been recognized in a long series of United States Supreme Court decisions.[2][3]
In Article I, Section 8, Clause 17 the United States Constitution empowers the federal government with exclusive legislative authority like that exercised for Washington D.C. over "Places purchased by the Consent of the Legislature of the State in which the same shall be, for the erection of Forts, Magazines, Arsenals, Dock-yards, and other needful Buildings."[4]
The federal government manages about 640 million acres (2.6 million km2) of land in the United States, which is about 28% of the total land area of 2.27 billion acres (9.2 million km2).[5][6] The majority of federal lands (610.1 million acres (2.469 million km2) or 95 percent area in 2015) are administered by the Bureau of Land Management (BLM), United States Fish and Wildlife Service (FWS), National Park Service (NPS), or United States Forest Service (USFS). BLM, FWS, and NPS are part of the United States Department of the Interior, while the Forest Service is part of the United States Department of Agriculture. An additional 11.4 million acres (46 thousand km2) of land (about 2% of all federal land) is managed by the United States Department of Defense (DOD).[6] The majority of federal lands are located in Alaska and the Western states.[6]