<P> The United States courts of appeals or circuit courts are the intermediate appellate 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 . </P> <P> The United States courts of appeals are considered among the most powerful and influential courts in the United States . Because of their ability to set legal precedent in regions that cover millions of Americans, the United States courts of appeals have strong policy influence on U.S. law . Moreover, because the U.S. Supreme Court chooses to review fewer than 2% of the more than 7,000 to 8,000 cases filed with it annually, the U.S. courts of appeals serve as the final arbiter on most federal cases . The Ninth Circuit in particular is very influential, covering 20% of the American population . </P> <P> There are currently 179 judgeships on the U.S. courts of appeals authorized by Congress in 28 U.S.C. § 43 pursuant to Article III of the U.S. Constitution . These judges are nominated by the President of the United States and confirmed by the United States Senate . They have lifetime tenure, earning (as of 2016) an annual salary of $215,400 . </P> <P> There are thirteen U.S. courts of appeals, although there are other tribunals that have "Court of Appeals" in their titles, such as the Court of Appeals for the Armed Forces, which hears appeals in court - martial cases, and the United States Court of Appeals for Veterans Claims, which reviews final decisions by the Board of Veterans' Appeals in the Department of Veterans Affairs . The eleven numbered circuits and the D.C. Circuit are geographically defined . The thirteenth court of appeals is the United States Court of Appeals for the Federal Circuit, which has nationwide jurisdiction over certain appeals based on their subject matter . All of the courts of appeals also hear appeals from some administrative agency decisions and rulemaking, with by far the largest share of these cases heard by the D.C. Circuit . The Federal Circuit hears appeals from specialized trial courts, primarily the United States Court of International Trade and the United States Court of Federal Claims, as well as appeals from the district courts in patent cases and certain other specialized matters . </P>

How many judges sit on the us court of appeals