A citizen's right to a trial by jury is a central feature of the United States Constitution. It is considered a fundamental principle of the American legal system.

Article Three of the United States Constitution establishes the judicial branch of the U.S. federal government. Under Article Three, the judicial branch consists of the Supreme Court of the United States, as well as lower courts created by Congress. Article Three empowers the courts to handle cases or controversies arising under federal law, as well as other enumerated areas. Article Three also defines treason.