
The federal court system in the United States comprises two types of courts—federal courts and state courts. Federal courts are responsible for interpreting federal statutes, federal regulations, and the United States Constitution, i.e., federal question jurisdiction. They have jurisdiction over cases that raise federal questions, particularly those involving the federal government, the Constitution, or other federal laws. These include cases involving navigable water bodies, international trade and customs issues, and claims for damages against the United States. Federal courts also hear cases between residents of different states, known as diversity jurisdiction. On the other hand, state courts handle more cases and interact with the public more frequently than federal courts. They deal with matters related to family laws, divorce, child custody, probate of wills, and most real estate cases. Understanding the intricate rules of the federal and state court systems is essential for navigating legal challenges effectively.
| Characteristics | Values |
|---|---|
| Type of court | Federal courts, federal district courts, federal circuit courts of appeals, and the Supreme Court of the United States |
| Jurisdiction | Limited jurisdiction, i.e., can only hear cases authorized by the United States Constitution or federal statutes |
| Types of cases | Civil and criminal cases, federal questions, cases with diverse citizenship, cases involving international trade and customs issues, claims for damages against the United States, cases that cross state lines, cases involving the federal government, and cases that affect or could affect the U.S.'s standing with other countries |
| Number of district courts | 94 |
| Number of circuit court judges | Ranges from six on the First Circuit to twenty-nine on the Ninth Circuit |
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What You'll Learn

Federal district courts
Federal district judges are appointed for life and can only be removed involuntarily if they violate the standard of "good behavior". Appeals from federal district courts are heard at the Federal Circuit Appellate Courts, which correspond to their geographic location.
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Federal appeals courts
The United States Courts of Appeal, also known as the Federal Circuit Courts, are the intermediate appellate federal courts. There are 13 such courts, including the Court of Appeals for the Federal Circuit. These courts hear appeals from decisions made by US District Courts, as well as other federal courts and agencies.
The Federal Circuit Court of Appeals has nationwide jurisdiction over specific issues, such as patent laws, and cases decided by the US Court of International Trade and the US Court of Federal Claims.
Appeals to circuit courts are first heard by a panel of three judges. The parties file ''briefs' to the court, arguing why the trial court's decision should be 'affirmed' or 'reversed'. After the briefs are filed, the court schedules 'oral argument' where lawyers come before the court to make their arguments and answer the judges' questions.
In rare cases, the entire circuit court may consider certain appeals in a process called an 'en banc hearing'. En banc opinions tend to carry more weight and are usually decided after a panel has first heard the case. Once a panel has ruled on an issue, no future panel can overrule that decision.
Beyond the Federal Circuit, there are other courts that deal with appeals on specific subjects, such as veterans' claims (United States Court of Appeals for Veterans Claims) and military matters (United States Court of Appeals for the Armed Forces).
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Federal Supreme Court
The United States Supreme Court is the highest court in the federal system. It has the power to decide appeals on all cases brought in federal court or state court. The Supreme Court has the discretion to hear cases involving important questions of federal law or the US Constitution.
The federal courts have jurisdiction over cases that raise federal questions, particularly those involving the federal government, the US Constitution, or other federal laws. Federal courts are responsible for interpreting federal statutes, federal regulations, and the United States Constitution, also known as federal question jurisdiction.
The federal district court is the starting point for any case arising under federal statutes, the Constitution, or treaties. This type of jurisdiction is called "original jurisdiction". There are 94 federal judicial districts, with at least one district in each state, the District of Columbia, and Puerto Rico.
The Supreme Court of the United States is the highest court in the American judicial system. Parties who wish to appeal a decision from a US Circuit Court of Appeals or the highest court in a state may petition the US Supreme Court by writ of certiorari. The Supreme Court receives approximately 10,000 petitions for writs of certiorari each year but hears about 75 to 80 cases.
The Federal Circuit Court of Appeals has nationwide jurisdiction over very specific issues, such as patents. Each circuit court has multiple judges, appointed for life by the president and confirmed by the Senate.
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Diversity jurisdiction
If a lawsuit does not meet these two conditions, federal courts will normally lack jurisdiction to hear it unless it involves a federal question, and the lawsuit would need to be heard in a state court instead. However, if a case is originally filed in a state court and meets the requirements for federal jurisdiction (diversity and amount in controversy, involves a federal question, or a supplemental jurisdiction exists), the defendant may remove the case to a federal court.
It is important to note that a partnership or limited liability company is considered to have the citizenship of all its constituent partners or members. Therefore, an LLC or partnership with one member or partner sharing citizenship with an opposing party will destroy diversity jurisdiction. Similarly, states themselves are not considered citizens for the purpose of diversity, but cities and towns (incorporated municipalities) are treated as citizens of the states in which they are located.
The current diversity jurisdiction provision is codified at 28 U.S.C. § 1332, and grants federal court jurisdiction in all civil actions between citizens of different states and between a citizen of a state and a subject of a foreign state, provided the amount in controversy exceeds $75,000. This provision has been in place since 1875, although the statute has grown more complex over time with amendments such as the Class Action Fairness Act of 2005 (CAFA), which expanded federal courts' jurisdiction over class actions.
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Admiralty
Federal courts are courts of limited jurisdiction, meaning they can only hear cases authorized by the United States Constitution or federal statutes. The federal district court is the starting point for any case arising under federal statutes, the Constitution, or treaties. This type of jurisdiction is called "original jurisdiction."
The United States Constitution grants federal courts jurisdiction over "all cases of admiralty and maritime jurisdiction." This includes two main types of cases:
- Those involving acts committed on the high seas or other navigable waters, such as prize cases, torts, injuries, and crimes;
- Those involving contracts and transactions connected with shipping employed on the seas or navigable waters.
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Frequently asked questions
Federal district courts, also known as U.S. District Courts, are the starting point for cases arising under federal laws. There are 94 federal judicial districts, with at least one district in each state, the District of Columbia, and Puerto Rico.
Federal district courts hear both civil and criminal cases. They have jurisdiction over cases involving federal statutes, interpretations of the US Constitution, or cases that concern more than one state.
Yes, you are legally entitled to represent yourself in federal district court proceedings. However, you will need to adhere to the Federal Rules of Civil Procedure and perform research on the proper legal forms and documentation to be successful.
Generally, no. Cases involving state law violations are heard in state courts. However, there are certain situations where federal courts have jurisdiction, such as when the case crosses state lines or involves a government agency.
The Supreme Court of the United States is the highest court in the federal system. It has the power to decide appeals on all cases brought in federal or state courts that involve important questions of federal law or the U.S. Constitution.











































