The United States courts of appeals (or circuit courts) are the intermediate appeal courts of the United States federal court system.
A court of appeals decides appeals from the district courts within its federal judicial circuit, and in some instances from other designated federal courts and administrative agencies. The United States Courts of Appeals serves as the final arbiter on most federal cases.
The United States Courts of Appeals are considered among the most powerful and influential courts in the United States. This is mostly due to their ability to set legal precedent in regions that cover millions of people.