HomeLaw & LegalConstitutional LawWhat is Marbury v. Madison?
Law & Legal·2 min·Updated Mar 12, 2026

What is Marbury v. Madison?

Marbury v. Madison

Quick Answer

This landmark Supreme Court case established the principle of judicial review in the United States. It allows the Supreme Court to declare laws unconstitutional, reinforcing the system of checks and balances.

Overview

Marbury v. Madison is a significant case decided by the U.S. Supreme Court in 1803. It arose when William Marbury sued Secretary of State James Madison for failing to deliver his commission as a justice of the peace. The Supreme Court, led by Chief Justice John Marshall, ruled that while Marbury had a right to his commission, the Court did not have the authority to force Madison to deliver it, as the law that granted the Court that power was unconstitutional. This case is important because it established the principle of judicial review, which allows the Supreme Court to invalidate laws that conflict with the Constitution. By asserting its power to review and nullify government actions, the Court ensured that no law or action could violate the foundational legal document of the nation. For example, if Congress passes a law that infringes on individual rights, the Supreme Court can strike it down, protecting citizens from government overreach. Marbury v. Madison set the stage for the role of the judiciary in the American legal system, emphasizing the importance of checks and balances among the branches of government. It has influenced countless cases since and remains a cornerstone of constitutional law. The decision affirmed that the judiciary is an equal branch of government, capable of checking the powers of the legislative and executive branches.


Frequently Asked Questions

The main issue was whether William Marbury had the right to his commission and whether the Supreme Court could compel Secretary of State James Madison to deliver it. The Court ultimately ruled that it did not have the authority to do so due to the unconstitutionality of the law involved.
It is considered a landmark case because it established the principle of judicial review, allowing the Supreme Court to declare laws unconstitutional. This principle is fundamental to the American legal system and ensures that the Constitution remains the supreme law of the land.
The case affects the balance of power by reinforcing the role of the judiciary as an equal branch of government. It ensures that the legislative and executive branches cannot exceed their authority without being checked by the courts.