United States federal judicial district in the context of "United States District Courts"

The U.S. Probation and Pretrial Services System, also called the Office of Probation and Pretrial Services, part of the Administrative Office of the United States Courts, is the probation office of the federal judiciary of the United States. It serves the United States district courts in all 94 federal judicial districts nationwide and constitutes the community corrections arm of the Federal Judiciary. It administers probation and supervised release under United States federal law enforced by probation officers.

The United States Court of Appeals for the First Circuit (in case citations, 1st Cir.) is a federal court with appellate jurisdiction over the district courts in the following districts:

• District of Maine
• District of Massachusetts
• District of New Hampshire
• District of Puerto Rico
• District of Rhode Island

The court is based at the John Joseph Moakley Federal Courthouse in Boston, Massachusetts. Most sittings are held in Boston, where the court usually sits for one week most months of the year; in one of July or August, it takes a summer break and does not sit. The First Circuit also sits for one week each March and November at the Jose V. Toledo Federal Building and United States Courthouse in Old San Juan, Puerto Rico, and occasionally sits at other locations within the circuit.

United States attorneys are officials of the U.S. Department of Justice who serve as the chief federal law enforcement officers in each of the 94 U.S. federal judicial districts. Each U.S. attorney serves as the United States' chief federal criminal prosecutor in their judicial district and represents the U.S. federal government in civil litigation in federal and state court within their geographic jurisdiction. U.S. attorneys must be nominated by the president and confirmed by the Senate, after which they serve four-year terms.

Currently, there are 91 U.S. attorneys and 2 vacancies in 94 district offices located throughout the United States, Puerto Rico, the U.S. Virgin Islands, Guam, and the Northern Mariana Islands. One U.S. attorney is assigned to each of the judicial districts, with the exception of Guam and the Northern Mariana Islands, where a single U.S. attorney serves both districts. Each U.S. attorney is the chief federal law enforcement officer within a specified jurisdiction, acting under the guidance of the United States Attorneys' Manual. They supervise district offices with as many as 350 assistant U.S. attorneys (AUSAs) and as many as 350 support personnel.

The United States Court of Appeals for the Fifth Circuit (in case citations, 5th Cir.) is one of the 13 United States courts of appeals. It has appellate jurisdiction over the U.S. district courts in the following federal judicial districts:

• Eastern District of Louisiana
• Middle District of Louisiana
• Western District of Louisiana
• Northern District of Mississippi
• Southern District of Mississippi
• Eastern District of Texas
• Northern District of Texas
• Southern District of Texas
• Western District of Texas

The Fifth Circuit has 17 active judgeships, and is headquartered at the John Minor Wisdom United States Court of Appeals Building in New Orleans, Louisiana, with the clerk's office located at the F. Edward Hebert Federal Building in New Orleans.

The United States Marshals Service (USMS) is a federal law enforcement agency in the United States. The Marshals Service serves as the enforcement and security arm of the U.S. federal judiciary. It is an agency of the U.S. Department of Justice and operates under the direction of the U.S. attorney general. U.S. Marshals are the original U.S. federal law enforcement officers, created by the Judiciary Act of 1789 during the presidency of George Washington as the "Office of the United States Marshal" under the U.S. district courts. The USMS was established in 1969 to provide guidance and assistance to U.S. Marshals throughout the federal judicial districts.

The Marshals Service is primarily responsible for locating and arresting federal suspects, the administration of fugitive operations, the management of criminal assets, the operation of the United States Federal Witness Protection Program and the Justice Prisoner and Alien Transportation System, the protection of federal courthouses and judicial personnel, and the protection of senior government officials through the Office of Protective Operations. Throughout its history the Marshals have also provided unique security and enforcement services including protecting African American students enrolling in the South during the civil rights movement, escort security for United States Air Force LGM-30 Minuteman missile convoys, law enforcement for the United States Antarctic Program, and protection of the Strategic National Stockpile.

The United States Judicial Panel on Multidistrict Litigation (J.P.M.L. or the Panel) is a special body within the United States federal court system which manages multidistrict litigation. It was established by Congress in 1968 by Pub. L. 90–296, and has the authority to determine whether civil actions pending in two or more federal judicial districts should be transferred to a single federal district court for pretrial proceedings. If such cases are determined to involve one or more common questions of fact and are transferred, the Panel will then select the district court and assign a judge or judges to preside over the litigation. The purpose of the transfer or "centralization" process is to conserve the resources of the parties and their counsel, as well as the judiciary, thus avoiding duplication of discovery and preventing inconsistent pretrial rulings.

The Chief Justice of the United States, currently John Roberts, appoints the members of the Panel, which is composed of no more than seven United States federal judges serving on either district courts or courts of appeals. All panel members must be from different judicial circuits. In addition to their participation on the Panel, the members continue to serve as judges for the courts to which they were originally appointed. The Panel convenes hearings in various locations around the country to facilitate the participation of parties and their counsel. The Office of the Clerk of the Panel is located at the Thurgood Marshall Federal Judiciary Building in Washington, D.C.