The Ninth Circuit Court of Appeals is one of the thirteen federal appellate courts in the United States. It covers a large geographic area, including the states of California, Oregon, Washington, Nevada, Idaho, Montana, and Arizona, as well as the territories of Guam and the Northern Mariana Islands. The court hears appeals from federal district courts within its jurisdiction and reviews decisions on a variety of legal issues. Established in 1891, the Ninth Circuit is known for its significant caseload and diverse range of cases. It is headquartered in San Francisco, California, and its decisions can have a wide impact, influencing law and policy across the western United States. The court is composed of several judges who serve on panels to review cases and issue rulings.