What is the highest court in the United States?

The highest court in the United States is the Supreme Court. This court serves as the final arbiter of federal constitutional law and has the authority to review decisions made by lower courts. Established under Article III of the U.S. Constitution, the Supreme Court has the power to interpret laws, adjudicate disputes involving federal laws, and has the ability to review state court decisions that may involve federal issues. Its decisions set precedents that all other courts in the country must follow, underscoring its critical role in the judiciary and its influence on American law and society.

In the context of the other options, District Courts are the trial courts of the federal system where most federal cases start, Circuit Courts generally refer to the intermediate appellate courts that review decisions of the District Courts, and Appellate Courts also review decisions but at various levels. None of these have the highest authority on legal matters as the Supreme Court does, which cements its status as the ultimate judicial authority in the United States.