List of United States Supreme Court cases, volume 87

This is a list of cases reported in volume 87 (20 Wall.) of United States Reports, decided by the Supreme Court of the United States in 1874 and 1875.

Nominative reports
In 1874, the U.S. government created the United States Reports, and retroactively numbered older privately-published case reports as part of the new series. As a result, cases appearing in volumes 1–90 of U.S. Reports have dual citation forms; one for the volume number of U.S. Reports, and one for the volume number of the reports named for the relevant reporter of decisions (these are called "nominative reports").

John William Wallace
Starting with the 66th volume of U.S. Reports, the Reporter of Decisions of the Supreme Court of the United States was John William Wallace. Wallace was Reporter of Decisions from 1863 to 1874, covering volumes 68 through 90 of United States Reports which correspond to volumes 1 through 23 of his Wallace's Reports. As such, the dual form of citation to, for example, Rubber-Tip Pencil Co. v. Howard is 87 U.S. (20 Wall.) 498 (1874).

Wallace's Reports were the final nominative reports for the US Supreme Court; starting with volume 91, cases were identified simply as "(volume #) U.S. (page #) (year)".

Justices of the Supreme Court at the time of 87 U.S. (20 Wall.)
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 87 U.S. (20 Wall.) were decided the Court comprised the following nine members:

Murdock v. City of Memphis
The Supreme Court in Murdock v. City of Memphis, 87 U.S. (20 Wall.) 590 (1875), established the principle that interpretation of state law is the province of state courts, and that the state supreme courts, rather than the federal courts, have final jurisdiction in this area.

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.

Bluebook citation style is used for case names, citations, and jurisdictions.
 * "C.C.D." = United States Circuit Court for the District of . ..
 * e.g.,"C.C.D.N.J." = United States Circuit Court for the District of New Jersey
 * "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.,"C.C.S.D.N.Y." = United States Circuit Court for the Southern District of New York
 * 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