ACLU Know Your Rights: A Practical Guide to Your Constitutional Rights

The American Civil Liberties Union has published a series of Know Your Rights guides that explain what the Constitution and federal law actually require from police officers, immigration agents, employers, and government officials in everyday situations. These guides are free, updated regularly, and cover scenarios most people face without ever consulting a lawyer. Understanding what the ACLU’s Know Your Rights materials contain — and how to use them — gives you a practical foundation for protecting yourself and others when it matters.

This guide breaks down the major ACLU Know Your Rights resources, explains what rights they cover, and provides practical steps for situations where those rights apply. It is not legal advice for your specific situation, but it covers the core principles the ACLU’s materials are built on and where to find authoritative guidance for your circumstances.

What the ACLU Know Your Rights Program Covers

The ACLU’s Know Your Rights program is a public education initiative that translates constitutional rights into plain language guides. The program covers interactions with law enforcement, immigration enforcement, workplace rights, voting rights, students’ rights, and LGBTQ+ rights, among others. The guides are produced by ACLU attorneys and reviewed for legal accuracy.

The core premise of the program is that many rights violations occur because people do not know they have those rights in the first place. A person who does not know they can refuse to consent to a search, invoke their right to remain silent, or request an attorney may give up those rights unintentionally. The Know Your Rights guides exist to close that gap.

The ACLU publishes both national guides and state-specific versions through its network of state affiliates. National guides cover federal constitutional rights that apply everywhere in the United States. State guides add protections that go beyond federal minimums — some states have stronger privacy laws, broader labor protections, or additional civil rights statutes.

Your Rights During Police Encounters

Police encounters are the most commonly referenced area in ACLU Know Your Rights materials, and for good reason. The rules governing stops, searches, and arrests are frequently misunderstood by both the public and, according to documented ACLU litigation, by law enforcement officers themselves.

The ACLU’s guidance on police encounters distinguishes between three types of contact: consensual encounters, investigative stops, and arrests. Each carries different legal standards and different rights.

Consensual encounters occur when an officer approaches you without any specific suspicion. You are free to walk away. The ACLU advises staying calm, asking clearly whether you are free to leave, and leaving if the officer says yes. You are not required to answer questions during a consensual encounter.

Investigative stops (sometimes called Terry stops) require the officer to have reasonable articulable suspicion that you are involved in criminal activity. During a stop, you are required to identify yourself in most states but are not required to answer other questions. The ACLU recommends clearly stating: “I am invoking my right to remain silent.” You should not physically resist even if you believe the stop is unlawful — document the details and challenge it afterward.

Arrests require probable cause. Upon arrest, you have the right to remain silent and the right to an attorney. The ACLU’s guidance is consistent: invoke both rights explicitly and do not answer questions until an attorney is present.

The ACLU also publishes specific guidance for encounters involving vehicle stops, home entries, and photography of police in public. Officers generally cannot enter your home without a warrant or your consent. You have the right to photograph and video record police activity in public spaces.

ACLU Know Your Rights: Immigration

The ACLU’s immigration rights materials are among the most widely distributed resources in the Know Your Rights program, particularly since 2016 when immigration enforcement operations increased significantly. The guides cover encounters with ICE (Immigration and Customs Enforcement), CBP (Customs and Border Protection), and interactions at ports of entry.

Key rights covered in the ACLU’s immigration materials include:

• The right to remain silent — you are not required to discuss your immigration status with ICE or police
• The right to refuse to open your door to ICE agents unless they have a judicial warrant signed by a judge (an ICE administrative warrant is not sufficient)
• The right to speak with a lawyer before signing any documents
• The right to a hearing before an immigration judge in most circumstances
• Specific protections for DACA recipients and asylum seekers

The ACLU publishes a Know Your Rights card specifically for immigration encounters — a wallet-sized summary of the most critical points that can be carried and referenced in the moment. The card instructs: remain silent, do not sign anything, ask to speak with a lawyer, and document badge numbers and names if possible.

For a full breakdown of what to do if immigration agents knock on your door, see our guide on ICE Know Your Rights: What to Do If Immigration Knocks.

Your Rights at Work

The ACLU’s workplace rights materials cover discrimination, harassment, privacy, and political activity on the job. Federal law prohibits employment discrimination based on race, color, religion, sex, national origin, age (40 and older), disability, and genetic information. The ACLU’s guides explain how these protections work in practice and what steps to take when they are violated.

The ACLU emphasizes that many workers are unaware of specific protections that go beyond general anti-discrimination principles. These include:

• Religious accommodation: Employers must make reasonable accommodations for religious practices unless doing so creates undue hardship for the business
• Pregnancy discrimination: Pregnant employees must be treated the same as employees with similar limitations and are protected from termination or demotion based on pregnancy
• Workplace surveillance: Employees generally have limited privacy expectations on employer-owned equipment, but some state laws restrict monitoring
• Political speech: The First Amendment restricts government employers from retaliating for political speech; private employers have more latitude, though some states provide additional protections

Students’ Rights Under ACLU Guidance

The ACLU has published extensive Know Your Rights materials specifically for students, covering K-12 schools and universities. These address free speech on campus, disciplinary proceedings, searches and surveillance, and protections for LGBTQ+ students.

Key points from the ACLU’s student rights guides:

• Students do not shed their constitutional rights at the schoolhouse gate — the Supreme Court established this principle in Tinker v. Des Moines (1969)
• School officials can search students and their belongings if they have reasonable suspicion, a lower standard than the probable cause required for police searches
• Students facing suspension or expulsion have due process rights including notice of the charges and an opportunity to respond
• Title IX prohibits sex-based discrimination in any educational program receiving federal funding, which includes most public and many private schools

What Are the Five Core Rights ACLU Materials Emphasize?

Across its Know Your Rights program, the ACLU consistently returns to five constitutional rights as the foundation of most encounters with government authority:

1. The right to remain silent (Fifth Amendment) — you cannot be compelled to incriminate yourself. This applies in police encounters, before grand juries, and in most government investigations.
2. The right to counsel (Sixth Amendment) — you have the right to an attorney in criminal proceedings. In custodial interrogations, invoking this right stops questioning until an attorney is present.
3. Protection against unreasonable searches and seizures (Fourth Amendment) — police generally need a warrant to search your home, a lower standard to search you in public, and cannot search your phone without a warrant following the Supreme Court’s 2014 decision in Riley v. California.
4. Equal protection (Fourteenth Amendment) — government entities cannot discriminate based on race, sex, national origin, or other protected characteristics. This is the constitutional basis for most civil rights litigation the ACLU pursues.
5. Free speech and assembly (First Amendment) — you have the right to express political views, practice your religion, and peacefully assemble. The ACLU’s guidance covers how these rights apply at protests, in schools, and in the workplace.

How to Access ACLU Know Your Rights Materials

The ACLU’s Know Your Rights guides are available at aclu.org/know-your-rights. The site organizes materials by topic — police encounters, immigration, voting, workplace, schools, and more — and by state where state-specific information is available.

For the most current state-specific guidance, the ACLU recommends contacting your local ACLU affiliate. Each state affiliate maintains its own Know Your Rights resources tailored to state law, which often provides protections beyond federal minimums.

The ACLU also offers:

• Downloadable PDF cards in multiple languages for quick-reference in encounters
• A mobile-friendly version of most guides
• Specific guides for targeted communities including immigrants, LGBTQ+ individuals, people with disabilities, and students
• An online intake system for reporting civil rights violations at aclu.org/report-civil-liberties-violation

If you believe your civil rights have been violated and need legal help, see our guide on how to get free legal advice for options that go beyond the ACLU’s resources.

What to Do Right Now

The most effective way to use ACLU Know Your Rights materials is before you need them. Download the relevant quick-reference card for your situation — police encounters, immigration, or workplace — and keep a digital copy on your phone. Share the resources with family members, particularly anyone who may face higher risk of civil rights violations due to immigration status, race, or profession.

If you have already experienced a civil rights violation, document everything you remember immediately: what was said, who was present, badge numbers, times, and locations. Then contact your local ACLU affiliate or a civil rights attorney. Many ACLU affiliates offer intake lines for reporting violations and some take cases directly. The ACLU’s national intake form is available at aclu.org/report-civil-liberties-violation.

Frequently Asked Questions About ACLU Know Your Rights

What rights does the ACLU defend?

The ACLU defends the individual rights and liberties guaranteed by the Constitution and federal law. Its core areas include free speech and press, voting rights, immigrants’ rights, racial justice, criminal justice reform, reproductive freedom, LGBTQ+ rights, and privacy. The organization litigates cases, lobbies for legislation, and publishes public education materials including the Know Your Rights series.

What is the ACLU Know Your Rights card?

The ACLU Know Your Rights card is a wallet-sized quick-reference card summarizing the most critical rights for specific situations — most commonly police encounters and immigration enforcement. The card instructs users to remain silent, not consent to searches, ask if they are free to leave, and request a lawyer if detained. Cards are available in multiple languages and can be downloaded from aclu.org.

What are the five rights of American citizens most emphasized by the ACLU?

The five rights most consistently emphasized in ACLU Know Your Rights materials are: the right to remain silent (Fifth Amendment), the right to counsel (Sixth Amendment), protection against unreasonable searches and seizures (Fourth Amendment), equal protection under the law (Fourteenth Amendment), and freedom of speech and peaceful assembly (First Amendment). These form the foundation of most civil liberties cases the ACLU handles.

What to do if ICE stops you according to the ACLU?

The ACLU advises remaining calm and silent, not opening your door unless agents present a judicial warrant signed by a judge, and clearly stating you are invoking your right to remain silent. Do not sign any documents. Ask to speak with a lawyer immediately. If outside, you may ask if you are free to leave. Document badge numbers and names afterward. The ACLU’s full immigration guide is available at aclu.org/know-your-rights/immigrants-rights.

What are my rights during a police stop?

During a police stop, you have the right to remain silent beyond providing your name in most states. You can refuse consent to a search, though police may search anyway if they have probable cause. Ask clearly whether you are free to leave. Do not physically resist even if you believe the stop is unlawful — challenge it legally afterward. If arrested, clearly invoke your right to remain silent and your right to an attorney before answering any questions.

How do I exercise my constitutional rights in practice?

Exercise your rights verbally and clearly. Say “I am invoking my right to remain silent” rather than simply staying quiet. Say “I do not consent to this search” rather than physically resisting. Ask “Am I free to leave?” to establish whether you are being detained. Write down what happened, including names, badge numbers, and times, as soon as possible afterward. If your rights were violated, contact your local ACLU affiliate or a civil rights attorney.