Most Famous Supreme Court Cases in U.S. History

The most famous Supreme Court cases in US history are the decisions that permanently changed how the Constitution applies to ordinary life: who can be forced to go to a segregated school, who gets a free lawyer, what the police must say before an interrogation, what counts as protected speech, whether same-sex couples can marry, and whether the government can regulate a handgun kept at home. A handful of these rulings created rights people now take for granted. Others reversed earlier decisions the Court itself later recognized as wrong. Each one reached the Court because it posed a constitutional question with no settled answer, and each one’s resolution became binding law for the entire country.

Judicial Review and the Reach of Federal Power

Before the Supreme Court could become the final word on anything, it had to claim that authority for itself. The earliest landmark cases did exactly that, and later decisions tested how far federal power actually reaches.

Marbury v. Madison (1803)

The case began with a political fight over judicial appointments. President John Adams signed commissions for several justices of the peace just before leaving office, and the new Jefferson administration refused to deliver them. William Marbury asked the Supreme Court to force Secretary of State James Madison to hand over his commission.¹

Chief Justice John Marshall’s opinion was a masterstroke of political maneuvering. The Court said Marbury deserved his commission but ruled that the law giving the Supreme Court the power to order its delivery was itself unconstitutional. In doing so, the Court established judicial review: the principle that federal courts can strike down any law that conflicts with the Constitution. Marshall wrote that it is “emphatically the province and duty of the Judicial Department to say what the law is,” and that any act of Congress conflicting with the Constitution “is void.”¹ Without this decision, the Court would have no mechanism to check the other branches of government.

McCulloch v. Maryland (1819)

Maryland tried to tax a branch of the Second Bank of the United States operating within its borders. The branch head, James McCulloch, refused to pay. The Court faced two questions: whether Congress had the power to create a national bank, and whether a state could tax a federal institution.²

Marshall answered yes to the first and no to the second. The Constitution grants Congress implied powers beyond those explicitly listed, he held, and the Necessary and Proper Clause allows Congress to use any reasonable means to carry out its enumerated responsibilities. Creating a bank to manage the nation’s finances qualified. The Court also held that states cannot tax federal operations, because “the power to tax involves the power to destroy,” and letting states undermine federal institutions would gut the Constitution’s supremacy.²

Gibbons v. Ogden (1824)

New York had granted a monopoly over steamboat navigation in its waters to Robert Livingston and Robert Fulton. Thomas Gibbons, who held a federal coasting license, challenged the monopoly when he was blocked from running his steamboat between New York and New Jersey. The Court ruled that the Commerce Clause gives Congress broad authority to regulate interstate commerce, including navigation. Marshall defined commerce not just as buying and selling goods but as “intercourse” between states in all its forms.³ When a state law conflicts with a valid federal regulation, the state law must yield. The decision laid the groundwork for nearly two centuries of federal regulatory power.

United States v. Lopez (1995)

Not every exercise of federal power survives scrutiny. Alfonso Lopez, a Texas high school senior, brought a handgun to school and was charged under the federal Gun-Free School Zones Act. The Court struck down the law, holding that simply possessing a firearm near a school is not an economic activity with a substantial effect on interstate commerce.⁴

The Court identified three categories of activity Congress can regulate under the Commerce Clause: the channels of interstate commerce, the people and things moving in interstate commerce, and activities that substantially affect interstate commerce. Carrying a gun in a local school zone fit none of them.⁴ Lopez was the first case in nearly 60 years to put a real limit on Congress’s commerce power.

Racial Equality and the 14th Amendment

No area of constitutional law has undergone a more complete reversal than racial equality. The Court first allowed segregation, then dismantled it, in a sequence that shows how the same constitutional text can yield opposite conclusions depending on who is reading it and when.

Plessy v. Ferguson (1896)

Louisiana required railroads to provide separate cars for Black and white passengers. Homer Plessy, who was of mixed race, deliberately sat in a white-designated car and was arrested. He argued the law violated the 14th Amendment’s guarantee of equal protection. The Court disagreed, holding that legally mandated separation did not stamp anyone with a “badge of inferiority” as long as the facilities were equal in quality.⁵

The lone dissenter, Justice John Marshall Harlan, wrote that “our Constitution is color-blind, and neither knows nor tolerates classes among citizens.” The “separate but equal” doctrine gave legal cover to segregation across the South for the next 58 years, and the “equal” part was rarely enforced.⁵

Brown v. Board of Education (1954)

The Court finally confronted Plessy head-on in consolidated cases involving Black children denied admission to white public schools. In a unanimous decision, the justices held that separating children in public schools solely by race violates the 14th Amendment’s Equal Protection Clause, even when the physical facilities are identical. The act of government-imposed separation itself generates a feeling of inferiority that undermines the educational process in ways no building upgrade can fix.⁶

Brown overruled Plessy’s “separate but equal” framework and signaled the end of legalized school segregation. Implementation proved far harder than the ruling itself. The next year, the Court ordered desegregation to proceed “with all deliberate speed,” a phrase vague enough that many states used it to delay for years.

Loving v. Virginia (1967)

Virginia law made interracial marriage a felony punishable by up to five years in prison. Richard Loving, a white man, and Mildred Jeter, a Black woman, married in Washington, D.C., then returned home to Virginia, where they were prosecuted. The Court unanimously struck down the statute, holding that restricting marriage solely based on race violates both the Equal Protection and Due Process Clauses of the 14th Amendment.⁷ The ruling invalidated similar laws in roughly a dozen other states and established that marriage is a fundamental right the government cannot restrict along racial lines.

Rights of People Accused of Crimes

Two cases from the 1960s transformed what it means to be arrested and charged with a crime in the United States. Before these rulings, the protections people now associate with the criminal justice system simply did not exist in many courtrooms.

Gideon v. Wainwright (1963)

Clarence Earl Gideon was charged with breaking and entering in Florida. He asked the trial judge to appoint a lawyer because he could not afford one. The judge refused. At the time, Florida only provided free attorneys in death penalty cases. Gideon represented himself, was convicted, and eventually petitioned the Supreme Court from his prison cell.⁸

In a unanimous decision, the Court held that the Sixth Amendment right to counsel is so fundamental to a fair trial that the 14th Amendment requires states to provide a lawyer to any defendant facing serious criminal charges who cannot pay for one. Justice Black wrote that anyone “too poor to hire a lawyer, cannot be assured a fair trial unless counsel is provided for him.”⁸ Gideon was retried with a court-appointed attorney and acquitted. The decision created the modern public defender system.

Miranda v. Arizona (1966)

Ernesto Miranda confessed to kidnapping and assault during a police interrogation, but he was never told he had the right to remain silent or the right to a lawyer. The Court examined several similar cases and ruled that the Fifth Amendment requires police to inform suspects of specific rights before custodial questioning begins. Officers must tell a suspect they have the right to remain silent, that anything they say can be used against them, and that they are entitled to an attorney, either hired or appointed.⁹

If these warnings are not given, statements made during interrogation generally cannot be used as evidence at trial. The warnings themselves became so embedded in American culture that most people can recite them from memory even if they have never been arrested.

Freedom of Speech, Press, and Religion

The First Amendment’s protections sound absolute on paper, but the Court has spent more than a century defining where those protections begin and end. The key question is always the same: at what point does the government’s interest in order, security, or fairness outweigh an individual’s right to speak freely?

Schenck v. United States (1919) and Brandenburg v. Ohio (1969)

During World War I, Charles Schenck distributed leaflets urging men to resist the military draft. The Court upheld his conviction, with Justice Oliver Wendell Holmes introducing the “clear and present danger” test: speech that creates a real and immediate risk of harm Congress has the power to prevent is not protected by the First Amendment. Holmes compared it to “falsely shouting fire in a crowded theatre.”¹⁰

Fifty years later, the Court raised the bar significantly. In Brandenburg v. Ohio, a Ku Klux Klan leader was convicted under an Ohio law for advocating violence at a rally. The Court overturned the conviction and established the modern standard: the government cannot punish inflammatory speech unless it is both directed at inciting imminent lawless action and likely to actually produce that action.¹¹ Vague threats and offensive rhetoric, however disturbing, are protected. Only speech that functions as a genuine trigger for immediate illegal conduct falls outside the First Amendment.

Tinker v. Des Moines (1969)

Three students in Des Moines, Iowa wore black armbands to school to protest the Vietnam War. The school district suspended them. The Court ruled 7-2 that students do not lose their constitutional rights at the schoolhouse gate. Wearing the armbands was symbolic speech protected by the First Amendment, and the school could not punish it without evidence that the expression caused substantial disruption to the educational process.¹² Schools retain authority to maintain order, but a generalized fear that students might react badly to a message is not enough to justify censorship.

New York Times Co. v. United States (1971)

The Nixon administration tried to block the New York Times and Washington Post from publishing the Pentagon Papers, a classified government study revealing decades of internal deliberations about the Vietnam War. The government argued publication would damage national security and sought a court order stopping the presses. The Court refused, holding that any government attempt to censor speech before publication “comes to this Court bearing a heavy presumption against its constitutional validity.”¹³ The government failed to meet that burden. The case remains the strongest statement that the First Amendment protects the press from government censorship, even when classified material is involved.

Citizens United v. FEC (2010)

A nonprofit corporation wanted to air a film criticizing a presidential candidate close to a primary election, which federal campaign finance law prohibited. The Court struck down the restriction, holding that the government cannot suppress political speech based on the speaker’s corporate identity. The majority reasoned that the First Amendment makes no distinction between individual and corporate speakers when it comes to political expression.¹⁴

The decision allowed corporations and unions to spend unlimited amounts on independent political communications, though it preserved disclosure and disclaimer requirements. Supporters argue the ruling protects free expression; critics say it opened the door to outsized corporate influence in elections.¹⁴

Kennedy v. Bremerton School District (2022)

A public high school football coach in Washington state knelt at the 50-yard line for a brief, personal prayer after games. The school district told him to stop, worried it would look like government endorsement of religion. When he refused, the district suspended him. The Court ruled 6-3 that the coach’s prayer was personal religious expression protected by both the Free Exercise and Free Speech Clauses of the First Amendment.¹⁵

The decision’s broader significance lies in what the Court discarded. For decades, courts evaluated government interactions with religion using a test from Lemon v. Kurtzman (1971). The Kennedy majority declared that framework abandoned, replacing it with an approach rooted in historical practices and understandings of the Establishment Clause.¹⁵ The full impact of that shift is still playing out in lower courts.

Privacy, Abortion, and Marriage

Some of the Court’s most emotionally charged decisions involve the question of whether the Constitution protects personal choices the text never explicitly mentions. The answers have changed over time, sometimes dramatically.

Roe v. Wade (1973) and Dobbs v. Jackson (2022)

A Texas law banned abortion except to save the mother’s life. In Roe v. Wade, the Court ruled that the 14th Amendment’s Due Process Clause protects a right to privacy broad enough to encompass the decision to terminate a pregnancy. The Court created a trimester framework: during the first trimester, the government could not interfere at all; during the second, it could regulate only to protect the mother’s health; and after fetal viability in the third trimester, the state could restrict or even ban abortion, provided it allowed an exception for the mother’s health.¹⁶

Roe stood for nearly half a century, though the Court replaced the trimester framework with an “undue burden” standard in Planned Parenthood v. Casey (1992). Then, in 2022, the Court overruled both decisions entirely. In Dobbs v. Jackson Women’s Health Organization, the majority held that “the Constitution does not confer a right to abortion” and returned the authority to regulate it “to the people and their elected representatives.”¹⁷ The practical effect was immediate: states gained the power to ban, restrict, or protect abortion access as they saw fit, creating a patchwork of laws that varies enormously across the country.

Obergefell v. Hodges (2015)

Same-sex couples in several states challenged laws that defined marriage as between a man and a woman. The Court ruled 5-4 that the right to marry is a fundamental liberty protected by the Due Process and Equal Protection Clauses of the 14th Amendment, and that this right extends to same-sex couples. Denying same-sex couples the ability to marry deprives them of equal dignity under the law.¹⁸

The decision required every state to both issue marriage licenses to same-sex couples and recognize same-sex marriages performed elsewhere.¹⁸ Obergefell built on the same line of reasoning as Loving v. Virginia, extending the principle that the government cannot restrict a fundamental right based on who someone chooses to marry.

The Second Amendment

For most of American history, the Supreme Court said almost nothing about the Second Amendment. Two recent decisions changed that, establishing an individual right to own firearms and a new framework for evaluating gun laws.

District of Columbia v. Heller (2008)

Washington, D.C. effectively banned handgun possession in the home. Dick Heller, a security guard authorized to carry a handgun at work, challenged the ban when he was denied a license to keep one at his residence. The Court ruled 5-4 that the Second Amendment protects an individual’s right to possess a firearm “unconnected with service in a militia” and to use it for traditionally lawful purposes like self-defense in the home.¹⁹ The decision settled a long-running debate about whether the amendment’s reference to a “well regulated Militia” limits the right to those serving in one. The Court said it does not.

New York State Rifle & Pistol Association v. Bruen (2022)

New York required anyone seeking a license to carry a concealed handgun in public to demonstrate a special need for self-defense beyond what the general public faces. The Court struck down this requirement and, more importantly, established a new test for evaluating all gun regulations. Under Bruen, when the Second Amendment’s text covers someone’s conduct, that conduct is presumptively protected. The government can only justify a restriction by showing it is consistent with the nation’s historical tradition of firearm regulation.²⁰

Bruen rejected the two-step balancing test most lower courts had been using, which weighed individual rights against the government’s public safety interests. Now the question is purely historical: can the government point to a comparable regulation from the founding era or the period when the 14th Amendment was ratified? Courts across the country have been forced to re-examine gun laws they previously upheld, and the results have been inconsistent as judges work out how to apply centuries-old history to modern firearms policy.

1
Justia U.S. Supreme Court Center. Marbury v. Madison, 5 U.S. 137 (1803)
2
Justia U.S. Supreme Court Center. McCulloch v. Maryland, 17 U.S. 316 (1819)
3
Justia U.S. Supreme Court Center. Gibbons v. Ogden, 22 U.S. 1 (1824)
4
Justia U.S. Supreme Court Center. United States v. Lopez, 514 U.S. 549 (1995)
5
Justia U.S. Supreme Court Center. Plessy v. Ferguson, 163 U.S. 537 (1896)
6
National Archives. Brown v. Board of Education (1954)
7
Justia U.S. Supreme Court Center. Loving v. Virginia, 388 U.S. 1 (1967)
8
Justia U.S. Supreme Court Center. Gideon v. Wainwright, 372 U.S. 335 (1963)
9
Justia U.S. Supreme Court Center. Miranda v. Arizona, 384 U.S. 436 (1966)
10
Justia U.S. Supreme Court Center. Schenck v. United States, 249 U.S. 47 (1919)
11
Justia U.S. Supreme Court Center. Brandenburg v. Ohio, 395 U.S. 444 (1969)
12
Justia U.S. Supreme Court Center. Tinker v. Des Moines Independent Community School District, 393 U.S. 503 (1969)
13
Justia U.S. Supreme Court Center. New York Times Co. v. United States, 403 U.S. 713 (1971)
14
Justia U.S. Supreme Court Center. Citizens United v. Federal Election Commission, 558 U.S. 310 (2010)
15
Justia U.S. Supreme Court Center. Kennedy v. Bremerton School District, 597 U.S. ___ (2022)
16
Justia U.S. Supreme Court Center. Roe v. Wade, 410 U.S. 113 (1973)
17
Justia U.S. Supreme Court Center. Dobbs v. Jackson Women’s Health Organization, 597 U.S. ___ (2022)
18
Justia U.S. Supreme Court Center. Obergefell v. Hodges, 576 U.S. 644 (2015)
19
Justia U.S. Supreme Court Center. District of Columbia v. Heller, 554 U.S. 570 (2008)
20
Justia U.S. Supreme Court Center. New York State Rifle and Pistol Association v. Bruen, 597 U.S. ___ (2022)