Johnson v. McIntosh, 21 U.S. (8 Wheat.) 543 (1823), also written M‘Intosh, is a landmark decision of the U.S. Supreme Court that held that private citizens could not purchase lands from Native Americans. As the facts were recited by Chief Justice John Marshall, the successor in interest to a private purchase from the Piankeshaw attempted to maintain an action of ejectment against the holder of a federal land patent.
The case is one of the most influential and well-known decisions of the Marshall Court, a fixture of the first-year curriculum in nearly all U.S. law schools. Marshall's opinion lays down the foundations of the doctrine of aboriginal title in the United States, and the related doctrine of discovery. However, the vast majority of the opinion is dicta; as valid title is a basic element of the cause of action for ejectment, the holding does not extend to the validity of McIntosh's title, much less the property rights of the Piankeshaw. Thus, all that the opinion holds with respect to aboriginal title is that it is inalienable, a principle that remains well-established law in nearly all common law jurisdictions.
