The landmark First Amendment Supreme Court cases are the rulings that gave real-world shape to the amendment’s five freedoms: speech, press, religion, assembly, and petition. Each one answered a specific question — when can the government punish inflammatory speech, when can it stop a newspaper from publishing, when can it regulate religion, when can it break up a protest — and together they form the working rulebook courts still apply today. The cases below are grouped by the freedom they address and by the doctrine each one established.
How the Court Draws the Line on Dangerous Speech
The first major free-speech cases arose during World War I. In Schenck v. United States, 249 U.S. 47 (1919), a Socialist Party official was convicted under the Espionage Act of 1917 for distributing leaflets urging resistance to the draft. Justice Oliver Wendell Holmes, writing for a unanimous Court, held that speech could be restricted when it created a “clear and present danger” of harms Congress had the power to prevent, famously comparing the leaflets to falsely shouting fire in a crowded theater.1Library of Congress. Schenck v. United States2Justia. Schenck v. United States
That framework no longer governs. In Brandenburg v. Ohio, 395 U.S. 444 (1969), the Court reversed the conviction of a Ku Klux Klan leader prosecuted under an Ohio criminal syndicalism law and replaced the Holmes standard with the imminent lawless action test. The government cannot punish inflammatory speech unless it is both directed at inciting immediate illegal conduct and likely to produce that conduct.3Justia. Brandenburg v. Ohio Under Brandenburg, even advocacy of violence or revolution remains protected unless it amounts to a genuine call to break the law right now.
Symbolic Speech and Offensive Expression
First Amendment protection reaches well beyond spoken and written words. In Tinker v. Des Moines Independent Community School District, 393 U.S. 503 (1969), the Court held that students wearing black armbands to protest the Vietnam War were engaged in protected expression. School officials could not suppress it unless they could show it would substantially interfere with school operations or the rights of other students.4Justia. Tinker v. Des Moines Independent Community School District Students, the Court said, do not shed their free-speech rights at the schoolhouse gate.
The Court applied the same principle to more provocative conduct in Texas v. Johnson, 491 U.S. 397 (1989). Gregory Lee Johnson burned an American flag outside the 1984 Republican National Convention and was convicted under a Texas flag-desecration statute. The Court reversed, holding that the government cannot ban the expression of an idea simply because others find it offensive.5Legal Information Institute. Texas v. Johnson6Justia. Texas v. Johnson
In Snyder v. Phelps, 562 U.S. 443 (2011), members of Westboro Baptist Church picketed a military funeral with inflammatory signs, and the soldier’s father won a multimillion-dollar verdict for intentional infliction of emotional distress. The Supreme Court reversed. Speech on public issues occupies the highest rung of First Amendment protection and cannot be restricted simply because it causes emotional pain.7Legal Information Institute. Snyder v. Phelps
What Speech the First Amendment Does Not Protect
A few narrow categories of speech fall outside the First Amendment’s shield. The Court has repeatedly stressed that these exceptions are limited.
- Fighting words. Chaplinsky v. New Hampshire, 315 U.S. 568 (1942), held that words which by their very utterance tend to incite an immediate breach of the peace have such slight social value that any benefit is outweighed by the public interest in order. The category covers face-to-face insults likely to provoke a violent reaction, not offensive speech generally.8Legal Information Institute. Chaplinsky v. State of New Hampshire
- Obscenity. Miller v. California, 413 U.S. 15 (1973), set a three-part test. A work is obscene only if the average person applying community standards would find it appeals to a prurient interest; it depicts sexual conduct in a patently offensive way as defined by state law; and it lacks serious literary, artistic, political, or scientific value. All three prongs must be met.9Justia. Miller v. California
- True threats. Counterman v. Colorado (2023) held that a speaker can be punished for a true threat only if the prosecution proves at least recklessness, meaning the speaker was aware others could view the statements as threatening violence and made them anyway. The ruling replaced the inconsistent approaches lower courts had been applying.10Supreme Court of the United States. Counterman v. Colorado
Commercial Advertising and Campaign Spending
Commercial advertising receives a middle tier of protection. In Central Hudson Gas and Electric Corp. v. Public Service Commission, 447 U.S. 557 (1980), the Court struck down a New York regulation banning promotional advertising by electric utilities and announced a four-part test. Commercial speech must concern lawful activity and not be misleading; the government interest in regulating it must be substantial; the regulation must directly advance that interest; and it must not be more extensive than necessary.11Justia. Central Hudson Gas and Electric Corp. v. Public Service Commission That framework still governs restrictions on advertising.
Few modern rulings have been more debated than Citizens United v. Federal Election Commission, 558 U.S. 310 (2010). Federal law prohibited corporations and unions from spending treasury funds on electioneering communications close to an election. The Court struck the ban down, holding that the First Amendment does not permit the government to restrict political speech based on the speaker’s corporate identity.12Justia. Citizens United v. Federal Election Commission The government retained the power to require disclosure, but caps on independent political expenditures by corporations and unions were eliminated.
Student Speech Posted Off Campus
The Tinker substantial-disruption test governed student speech for decades. Social media forced the Court to address whether schools can punish what students say away from school. In Mahanoy Area School District v. B.L. (2021), a high school student who failed to make the varsity cheerleading squad posted a profane Snapchat message over the weekend criticizing the school and was suspended from the junior varsity squad. The Court ruled for the student, holding that while schools may have some interest in regulating certain off-campus speech, those interests were insufficient here.13Justia. Mahanoy Area School District v. B. L. The decision stopped short of a bright-line rule, but it signaled that schools face a heavy burden when reaching beyond campus to punish student expression.
When the Government Is the Speaker
The analysis changes when the government itself is doing the speaking. In Walker v. Texas Division, Sons of Confederate Veterans, Inc., 576 U.S. 200 (2015), the Court held that specialty license plate designs are government speech, not a public forum for private expression, because plates are closely identified with the state and have historically carried government messages. Texas could therefore refuse a Confederate flag design.14Justia. Walker v. Texas Division, Sons of Confederate Veterans, Inc. Under the government speech doctrine, the state can choose its own message. The one limit is that it cannot force private citizens to deliver that message for it.
Press Freedom and Prior Restraint
Press cases often turn on prior restraint, the doctrine that bars the government from blocking publication before it happens. Near v. Minnesota, 283 U.S. 697 (1931), struck down a state law that allowed officials to shut down newspapers deemed “malicious, scandalous and defamatory.” Any system of prepublication censorship, the Court held, carries a heavy presumption of unconstitutionality.15Justia. Near v. Minnesota
That presumption faced its sharpest test in New York Times Co. v. United States, 403 U.S. 713 (1971), the Pentagon Papers case. The Nixon administration sought injunctions to stop the New York Times and the Washington Post from publishing a classified Defense Department study of the Vietnam War. The Court refused, holding that the government had not met its heavy burden of justifying a prior restraint.16Library of Congress. New York Times Co. v. United States Vague appeals to national security were not enough.
Defamation and the Actual Malice Standard
Press freedom would mean little if newspapers could be bankrupted by defamation suits every time they published something a public official disliked. New York Times Co. v. Sullivan, 376 U.S. 254 (1964), arose after an Alabama police commissioner won a $500,000 verdict over a newspaper advertisement containing minor factual errors about civil rights protests. The Court reversed, holding that a public official suing for defamation must prove the statement was made with “actual malice,” meaning the speaker knew it was false or acted with reckless disregard for the truth.17Justia. New York Times Co. v. Sullivan That is where most defamation claims by politicians still fall apart. The bar is intentionally high; the alternative would chill the aggressive reporting the First Amendment exists to protect.
Reporters and Confidential Sources
One area where the press has not won broad protection is the right to shield sources. Branzburg v. Hayes, 408 U.S. 665 (1972), held 5-4 that reporters do not have a First Amendment privilege to refuse grand jury testimony about confidential sources. Journalists, the majority reasoned, have the same obligation as other citizens to provide evidence in criminal investigations.18Library of Congress. Branzburg v. Hayes Justice Powell’s concurrence left room for reporters to challenge subpoenas when the information sought bore only a tenuous connection to an investigation, and lower courts have used that opening to recognize a qualified reporter’s privilege in many jurisdictions. The result is a patchwork rather than a blanket constitutional protection.
The Establishment Clause
The First Amendment’s religion protections come in two parts. The Establishment Clause prevents the government from sponsoring or favoring religion. The Free Exercise Clause protects individuals from government interference with religious practice.19Congress.gov. Overview of the Religion Clauses
Engel v. Vitale, 370 U.S. 421 (1962), struck down a state-composed prayer recited in public schools. Even though the prayer was nondenominational and participation was voluntary, government authorship amounted to an unconstitutional endorsement of religion.20Justia. Engel v. Vitale
For decades, Establishment Clause challenges were evaluated under the three-part test from Lemon v. Kurtzman, 403 U.S. 602 (1971), which struck down state salary supplements for teachers at religious schools. A policy had to have a secular purpose, could not primarily advance or inhibit religion, and could not create excessive entanglement between government and religion.21Justia. Lemon v. Kurtzman
The Lemon test is no longer the governing standard. In Kennedy v. Bremerton School District (2022), the Court explicitly abandoned it. The case involved a public high school football coach fired for kneeling in private prayer on the field after games. Ruling for the coach, the Court held that the Free Exercise and Free Speech Clauses protect personal religious observance from government retaliation, and it directed lower courts to look to “historical practices and understandings” when evaluating Establishment Clause claims.22Justia. Kennedy v. Bremerton School District Going forward, courts evaluate government interaction with religion primarily by asking whether a practice has a historical pedigree.
The Free Exercise Clause
The Free Exercise Clause protects the right to practice one’s faith even when doing so conflicts with general laws. In Wisconsin v. Yoder, 406 U.S. 205 (1972), Amish parents were convicted and fined $5 each for refusing to send their children to school past the eighth grade. The Court reversed, holding that their deeply rooted religious beliefs outweighed the state’s interest in enforcing mandatory education, and that when a law imposes a genuine burden on sincere religious practice the government must show enforcement is necessary to achieve a compelling interest.23Justia. Wisconsin v. Yoder
In Hosanna-Tabor Evangelical Lutheran Church and School v. EEOC, 565 U.S. 171 (2012), the Court unanimously recognized a “ministerial exception” that bars employment discrimination lawsuits brought by ministers against their churches. Forcing a church to accept or retain an unwanted minister would intrude on its right to shape its own faith and mission, violating both religion clauses.24Justia. Hosanna-Tabor Evangelical Lutheran Church and School v. EEOC The exception reaches employees who perform some secular duties, so long as the religious organization holds them out as ministers and they accept a formal call to religious service.
Assembly, Association, and Reasonable Restrictions
The assembly and petition clauses protect the right to gather in public and demand government action. Edwards v. South Carolina, 372 U.S. 229 (1963), reversed the breach-of-peace convictions of nearly 200 Black students arrested for peacefully marching to the state capitol to protest segregation. Government cannot criminalize the peaceful expression of unpopular views simply because bystanders might react with hostility.25Justia. Edwards v. South Carolina
Association rights carry constitutional weight as well. Boy Scouts of America v. Dale, 530 U.S. 640 (2000), held that a private organization engaged in expressive activity has the right to exclude individuals whose presence would significantly burden its ability to advocate its viewpoints. Applying a state public accommodations law to force the organization to accept an unwanted member would interfere with its First Amendment right to control its message.26Justia. Boy Scouts of America v. Dale
Assembly rights have limits. The government can impose reasonable time, place, and manner restrictions on public gatherings if the rules are content-neutral. Ward v. Rock Against Racism, 491 U.S. 781 (1989), upheld New York City’s requirement that performers at a Central Park bandshell use a city-provided sound system and technician to control volume. Such regulations must be content-neutral, narrowly tailored to serve a significant government interest, and leave open alternative channels for communication.27Justia. Ward v. Rock Against Racism “Narrowly tailored” does not require the least restrictive means; the restriction simply cannot burden substantially more speech than necessary.
The First Amendment Online
The Court is still working out how traditional First Amendment principles apply to social media. The most significant recent ruling is Moody v. NetChoice, LLC (2024), which addressed Texas and Florida laws that would have prevented large social media companies from removing or deprioritizing content based on the poster’s political viewpoint. When a private entity engages in expressive activity, including curating and compiling the speech of others, the First Amendment protects it from being forced to carry messages it would prefer to exclude. A state cannot override that editorial discretion simply by invoking an interest in balancing the marketplace of ideas.28Justia. Moody v. NetChoice, LLC Content moderation decisions by platforms now carry First Amendment protection similar to traditional editorial choices.
The limits on government involvement with online speech also reached the Court in Murthy v. Missouri (2024), where plaintiffs argued that federal officials unconstitutionally coerced social media platforms into suppressing certain viewpoints. The Court did not rule on the merits. It held that the plaintiffs lacked standing, having failed to show a sufficiently direct link between a specific official’s pressure and the removal of their specific posts.29Supreme Court of the United States. Murthy v. Missouri When behind-the-scenes government pressure on platforms crosses the line into unconstitutional coercion remains an open question, and it is likely to return to the Court as the relationship between officials and tech companies continues to develop.