Where in the Constitution is the right to privacy found?

The right to privacy is not stated in any single provision of the Constitution but is inferred from the First, Third, Fourth, Fifth, Ninth, and Fourteenth Amendments. Justice William O. Douglas explained the analysis in Griswold v. Connecticut (1965), where the Supreme Court struck down a Connecticut law banning contraceptive use by married couples. Douglas wrote that specific guarantees in the Bill of Rights have penumbras, formed by emanations from those guarantees that help give them life and substance, and that various guarantees create zones of privacy.

The First Amendment supports privacy in beliefs and associations under cases such as NAACP v. Alabama (1958), which barred Alabama from compelling the NAACP to disclose its membership lists. The Third Amendment protects the home from being commandeered for soldiers, recognizing the home as a constitutionally protected space. The Fourth Amendment protects the people in their persons, houses, papers, and effects against unreasonable searches and seizures, the most familiar privacy guarantee.

Katz v. United States (1967) established that the Fourth Amendment protects people, not places, and applies wherever a person has a reasonable expectation of privacy. Riley v. California (2014) required a warrant to search the contents of a cell phone seized during arrest. Carpenter v. United States (2018) extended Fourth Amendment protection to historical cell site location records.

The Fifth Amendment protects against compelled self-incrimination, shielding the privacy of mental processes. The Ninth Amendment retains for the people rights not specifically enumerated, providing textual support for unenumerated privacy rights.

The Fourteenth Amendment Due Process Clause has been read to protect substantive privacy rights such as the right to marry under Loving v. Virginia (1967) and Obergefell v. Hodges (2015), the right to use contraceptives under Eisenstadt v. Baird (1972), and the right to engage in consensual private sexual conduct under Lawrence v. Texas (2003). The Supreme Court overruled Roe v. Wade (1973) in Dobbs v. Jackson Women's Health Organization (2022), holding that abortion is not historically recognized as a fundamental right and returning the issue to elected representatives, although Justice Brett Kavanaugh's concurrence emphasized that the decision did not affect other privacy rights.

Federal statutes supplement constitutional privacy protections, including the Privacy Act of 1974, the Electronic Communications Privacy Act of 1986, the Health Insurance Portability and Accountability Act of 1996, and the Family Educational Rights and Privacy Act of 1974. Some state constitutions explicitly protect privacy. Naturalization candidates should know that privacy is a constitutional value drawn from many sources rather than a single text.