List of United States Supreme Court cases, volume 254

This is a list of cases reported in volume 254 of United States Reports, decided by the Supreme Court of the United States in 1920 and 1921.

Justices of the Supreme Court at the time of volume 254 U.S.
The Supreme Court is established by Article III, Section 1 of the Constitution of the United States, which says: "The judicial Power of the United States, shall be vested in one supreme Court . . .". The size of the Court is not specified; the Constitution leaves it to Congress to set the number of justices. Under the Judiciary Act of 1789 Congress originally fixed the number of justices at six (one chief justice and five associate justices). Since 1789 Congress has varied the size of the Court from six to seven, nine, ten, and back to nine justices (always including one chief justice).

When the cases in volume 254 were decided the Court comprised the following nine members:

United States v. Wheeler
In United States v. Wheeler, 254 U.S. 281 (1920), the Supreme Court held that the Constitution alone does not grant the federal government the power to prosecute kidnappers, even if moving abductees across state lines on federally-regulated railroads at the behest of local law enforcement officials, and only the states have the authority to punish a private citizen's unlawful violation of another's freedom of movement. The case was a landmark interpretation of the Privileges and Immunities Clause of the Constitution, and contains a classic legal statement of the right to travel in American jurisprudence. In most common law jurisdictions, kidnapping had been outlawed by the courts, not by statute, but the Supreme Court had held in United States v. Hudson and Goodwin (1812) that the Constitution prohibited common law crimes. It was only after the Lindbergh kidnapping in 1932, which ended in the death of 21-month-old Charles Lindbergh, Jr., that Congress passed the Federal Kidnapping Act, which prohibited kidnapping.

Duplex Printing Press Co. v. Deering
Duplex Printing Press Co. v. Deering, 254 U.S. 443 (1921), is an antitrust case in which the Supreme Court examined the labor provisions of the Clayton Antitrust Act and reaffirmed its prior ruling in Loewe v. Lawlor that a secondary boycott was an illegal restraint on trade. The decision authorized courts to issue injunctions to block this practice, and any other tactics used by labor unions that were deemed unlawful restraints on trade.

Citation style
Under the Judiciary Act of 1789 the federal court structure at the time comprised District Courts, which had general trial jurisdiction; Circuit Courts, which had mixed trial and appellate (from the US District Courts) jurisdiction; and the United States Supreme Court, which had appellate jurisdiction over the federal District and Circuit courts—and for certain issues over state courts. The Supreme Court also had limited original jurisdiction (i.e., in which cases could be filed directly with the Supreme Court without first having been heard by a lower federal or state court). There were one or more federal District Courts and/or Circuit Courts in each state, territory, or other geographical region.

The Judiciary Act of 1891 created the United States Courts of Appeals and reassigned the jurisdiction of most routine appeals from the district and circuit courts to these appellate courts. The Act created nine new courts that were originally known as the "United States Circuit Courts of Appeals." The new courts had jurisdiction over most appeals of lower court decisions. The Supreme Court could review either legal issues that a court of appeals certified or decisions of court of appeals by writ of certiorari. On January 1, 1912, the effective date of the Judicial Code of 1911, the old Circuit Courts were abolished, with their remaining trial court jurisdiction transferred to the U.S. District Courts.

Bluebook citation style is used for case names, citations, and jurisdictions.
 * "# Cir." = United States Court of Appeals
 * e.g., "3d Cir." = United States Court of Appeals for the Third Circuit
 * "D." = United States District Court for the District of . ..
 * e.g.,"D. Mass." = United States District Court for the District of Massachusetts
 * "E." = Eastern; "M." = Middle; "N." = Northern; "S." = Southern; "W." = Western
 * e.g.,"M.D. Ala." = United States District Court for the Middle District of Alabama
 * "Ct. Cl." = United States Court of Claims
 * The abbreviation of a state's name alone indicates the highest appellate court in that state's judiciary at the time.
 * e.g.,"Pa." = Supreme Court of Pennsylvania
 * e.g.,"Me." = Supreme Judicial Court of Maine