The U.S. Supreme Court rules in Lawrence v. Texas that sex-based sodomy laws are unconstitutional.

The Supreme Court of the United States (SCOTUS) is the highest court in the federal judiciary of the United States. It has ultimate appellate jurisdiction over all U.S. federal court cases, and over state court cases that turn on questions of U.S. constitutional or federal law. It also has original jurisdiction over a narrow range of cases, specifically "all Cases affecting Ambassadors, other public Ministers and Consuls, and those in which a State shall be Party." In 1803, the court asserted itself the power of judicial review, the ability to invalidate a statute for violating a provision of the Constitution via the landmark case Marbury v. Madison. It is also able to strike down presidential directives for violating either the Constitution or statutory law.

Lawrence v. Texas, 539 U.S. 558 (2003), is a landmark decision of the United States Supreme Court in which the Court ruled that U.S. state laws criminalizing sodomy between consenting adults are unconstitutional. The Court reaffirmed the concept of a "right to privacy" that earlier cases had found the United States Constitution provides, even though it is not explicitly enumerated. It based its ruling on the notions of personal autonomy to define one's own relationships and of American traditions of non-interference with any or all forms of private sexual activities between consenting adults.

A sodomy law is a law that defines certain sexual acts as crimes. The precise sexual acts meant by the term sodomy are rarely spelled out in the law, but are typically understood and defined by many courts and jurisdictions to include any or all forms of sexual acts that are illegal, illicit, unlawful, unnatural and immoral. Sodomy typically includes anal sex, oral sex, manual sex, and bestiality. In practice, sodomy laws have rarely been enforced to target against sexual activities between individuals of the opposite sex, and have mostly been used to target against sexual activities between individuals of the same sex.