Federal lands in the context of United States National Grassland

Article Four of the United States Constitution outlines the relationship between the various states, as well as the relationship between each state and the United States federal government. It also empowers Congress to admit new states and administer the territories and other federal lands.

The Full Faith and Credit Clause requires states to extend "full faith and credit" to the public acts, records, and court proceedings of other states. The Supreme Court has held that this clause prevents states from reopening cases that have been conclusively decided by the courts of another state. The Privileges and Immunities Clause requires interstate protection of "privileges and immunities," preventing each state from treating citizens of other states in a discriminatory manner. The Extradition Clause requires that fugitives from justice be extradited on the demand of executive authority of the state from which they flee. Since the 1987 case of Puerto Rico v. Branstad, federal courts may also use the Extradition Clause to require the extradition of fugitives. The Fugitive Slave Clause requires the return of fugitive slaves; this clause was rendered moot by the Thirteenth Amendment, which abolished involuntary servitude, except in the prison system.

The Homestead Acts were several laws in the United States by which an applicant could acquire ownership of government land or the public domain, typically called a homestead. In all, more than 160 million acres (650 thousand km; 250 thousand sq mi) of public land, or nearly 10 percent of the total area of the United States, were given away free to 1.6 million homesteaders; most of the homesteads were west of the Mississippi River.

An extension of the homestead principle in law, the Homestead Acts were an expression of the Free Soil policy of Northerners who wanted individual farmers to own and operate their own farms, as opposed to Southern slave owners who wanted to buy up large tracts of land and use slave labor, thereby shutting out free white farmers.

The United States Department of Agriculture (USDA) is an executive department of the United States federal government that aims to meet the needs of commercial farming and livestock food production, promotes agricultural trade and production, works to assure food safety, protects natural resources, fosters rural communities and works to end hunger in the United States and internationally. It is headed by the secretary of agriculture, who reports directly to the president of the United States and is a member of the president's Cabinet. The current secretary is Brooke Rollins, who has served since February 13, 2025.

Approximately 71% of the USDA's $213 billion budget goes towards nutrition assistance programs administered by the Food and Nutrition Service (FNS). The largest component of the FNS budget is the Supplemental Nutrition Assistance Program (formerly known as the 'Food Stamp' program), which is the cornerstone of USDA's nutrition assistance. The United States Forest Service is the largest agency within the department, which administers national forests and national grasslands that together comprise about 25% of federal lands.

The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior responsible for administering U.S. federal lands. Headquartered in Washington, D.C., the BLM oversees more than 247.3 million acres (1,001,000 km) of land, or one-eighth of the United States's total landmass.

The Bureau was created by Congress during the presidency of Harry S Truman in 1946 by combining two existing agencies: the United States General Land Office and the Grazing Service. The agency manages the federal government's nearly 700 million acres (2,800,000 km) of subsurface mineral estate located beneath federal, state and private lands severed from their surface rights by the Homestead Act of 1862. Most BLM public lands are located in these 12 western states: Alaska, Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington and Wyoming.

The United States Department of the Interior (DOI) is an executive department of the U.S. federal government responsible for the management and conservation of most federal lands and natural resources. It also administers programs relating to Native Americans, Alaska Natives, Native Hawaiians, and four of the five inhabited insular areas of the United States, as well as programs related to historic preservation. About 75% of federal public land is managed by the department, with most of the remainder managed by the Department of Agriculture's Forest Service. The department was created on March 3, 1849. It is headquartered at the Main Interior Building, located at 1849 C Street NW in Washington, D.C.

The department is headed by the secretary of the interior, who reports directly to the president of the United States and is a member of the president's Cabinet. The current interior secretary is Doug Burgum, who was sworn in on February 1, 2025.

In the United States, national forest is a classification of protected and managed federal lands that are largely forest and woodland areas. They are owned collectively by the American people through the federal government and managed by the United States Forest Service, a division of the United States Department of Agriculture. The U.S. Forest Service is also a forestry research organization that provides financial assistance to the state and local forestry industry. There are 154 national forests in the United States.

The United States Forest Service (USFS) is an agency within the United States Department of Agriculture. It administers the nation's 154 national forests and 20 national grasslands covering 193 million acres (780,000 km) of land. The major divisions of the agency are the Chief's Office, National Forest System, State and Private Forestry, Business Operations, as well as Research and Development. The agency manages about 25% of federal lands and is the sole major national land management agency not part of the U.S. Department of the Interior (which manages the National Park Service, the U.S. Fish and Wildlife Service and the Bureau of Land Management).