SCOTUS Precedents / Marbury v Madison / Brown v Board / Miranda
15 Landmark U.S. Supreme Court Cases Guide 2026
Guide to 15 landmark U.S. Supreme Court decisions, their constitutional holdings, historical significance, and later developments affecting how those precedents are understood in 2026.
Landmark Supreme Court Cases: 2026 Reference
This guide summarizes major U.S. Supreme Court precedents, the constitutional provisions involved, the holdings of the cases, and important later developments that affect their current legal significance in 2026. These cases are historical judicial precedents rather than filing procedures or compliance programs, so no universal filing deadline or renewal requirement applies to the collection as a whole.
Primary Authority
Major constitutional holdings and Supreme Court precedents.
Compliance Deadline
Later cases, constitutional amendments, and modern doctrine can affect how an older precedent is applied.
15 Landmark Cases & Key Holdings
| Case | Year | Key Constitutional Significance |
|---|---|---|
| Marbury v. Madison | 1803 | Established federal judicial review of unconstitutional legislative acts. |
| McCulloch v. Maryland | 1819 | Confirmed implied federal powers and federal supremacy over conflicting state action. |
| Gibbons v. Ogden | 1824 | Broadly interpreted Congress's Commerce Clause authority over interstate commerce. |
| Plessy v. Ferguson | 1896 | Established the 'separate but equal' doctrine later rejected in public education by Brown. |
| Brown v. Board of Education | 1954 | Held state-imposed racial segregation in public schools unconstitutional under Equal Protection. |
| Mapp v. Ohio | 1961 | Applied the federal exclusionary rule to the states through the Fourteenth Amendment. |
| Gideon v. Wainwright | 1963 | Required states to provide counsel to indigent defendants in felony prosecutions. |
| Miranda v. Arizona | 1966 | Required warnings to protect the Fifth Amendment privilege during custodial interrogation. |
| United States v. Nixon | 1974 | Rejected an absolute presidential privilege from complying with a judicial subpoena for evidence in a criminal proceeding. |
| Regents of the University of California v. Bakke | 1978 | Addressed constitutional limits on race-conscious university admissions and rejected rigid racial quotas in the challenged program. |
| Plyler v. Doe | 1982 | Held Texas's denial of free public K-12 education to children based on unlawful immigration status unconstitutional under Equal Protection. |
| Texas v. Johnson | 1989 | Held that flag burning as expressive conduct is protected by the First Amendment. |
| District of Columbia v. Heller | 2008 | Recognized an individual Second Amendment right to possess a firearm for lawful purposes such as self-defense in the home. |
| Obergefell v. Hodges | 2015 | Held that the Fourteenth Amendment requires states to license and recognize marriages between two people of the same sex. |
| Dobbs v. Jackson Women's Health Organization | 2022 | Held that the Constitution does not confer a federal constitutional right to abortion and overruled Roe v. Wade and Planned Parenthood v. Casey. |
Older precedents can be limited, distinguished, or overruled by later Supreme Court decisions. For example, Plessy's segregation doctrine was rejected in public education by Brown, and Dobbs overruled Roe and Casey on the federal constitutional abortion-right question.
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Frequently Asked Questions (FAQ)
Marbury v. Madison, 5 U.S. (1 Cranch) 137 (1803), established the federal judiciary's authority to review the constitutionality of legislative acts. The Court held that when a federal statute conflicts with the Constitution, the Constitution controls. The decision is the foundational U.S. precedent for judicial review.
Brown v. Board of Education, 347 U.S. 483 (1954), unanimously held that state-imposed racial segregation in public schools violated the Fourteenth Amendment's Equal Protection Clause. The decision rejected the 'separate but equal' doctrine in the field of public education and became the landmark foundation for school desegregation.
Gideon v. Wainwright, 372 U.S. 335 (1963), held that the Sixth Amendment right to counsel is fundamental and applies to the states through the Fourteenth Amendment. An indigent state criminal defendant charged with a felony must be provided appointed counsel when the defendant cannot afford a lawyer.
Miranda v. Arizona, 384 U.S. 436 (1966), held that before custodial interrogation, police generally must advise a suspect of the right to remain silent, that statements can be used against the suspect, and the right to an attorney, including appointed counsel if the suspect cannot afford one. The required warnings are principally grounded in the Fifth Amendment privilege against self-incrimination; the Sixth Amendment also protects the right to counsel at critical stages of a criminal prosecution, but Miranda warnings are not simply a Sixth Amendment rule.
District of Columbia v. Heller, 554 U.S. 570 (2008), held that the Second Amendment protects an individual right to possess a firearm, unconnected with militia service, for traditionally lawful purposes such as self-defense in the home. Heller also recognized that the right is not unlimited and that longstanding regulatory measures may remain permissible. Later decisions, including New York State Rifle & Pistol Ass'n v. Bruen (2022) and United States v. Rahimi (2024), further developed the Court's Second Amendment analysis.
Plyler v. Doe, 457 U.S. 202 (1982), held that a Texas law denying free public elementary and secondary education to children who were not lawfully admitted into the United States violated the Fourteenth Amendment's Equal Protection Clause. The decision did not hold that undocumented persons have a general constitutional right to public benefits or to education beyond the public K-12 context addressed in the case.
Official U.S. Judicial References
• Supreme Court of the United States Official Portal: supremecourt.gov
• Oyez U.S. Supreme Court Case Archive: oyez.org