
The US Constitution establishes a federal system of government, with power shared between the federal government and state governments, each with their own court systems. The jurisdiction of federal courts is defined by the Constitution, congressional statutes, and decisions of the Supreme Court. Federal courts have jurisdiction over cases in law and equity arising under the Constitution, laws, and treaties of the United States, as well as cases involving ambassadors, admiralty, and maritime jurisdiction. They also preside over controversies to which the US is a party, between citizens of different states, and those involving international trade and tax. State law cases may be brought to federal court under diversity jurisdiction, where plaintiffs and defendants are from different states and the amount in controversy exceeds $75,000. Federal courts can also acquire ancillary jurisdiction over cases presenting two federal issues, even if they would not typically have jurisdiction over one of the issues.
| Characteristics | Values |
|---|---|
| Number of federal circuits | 12 |
| Number of Supreme Court justices | 9 |
| Number of U.S. courts of appeals | 13 |
| Number of U.S. district courts | 94 |
| Number of U.S. bankruptcy courts | 90 |
| Jurisdiction | Defined by the Constitution, congressional statutes, and decisions of the Supreme Court of the United States |
| Diversity jurisdiction | Allowed when all plaintiffs are located in different states than defendants and the "amount in controversy" is more than $75,000 |
| Cases with original jurisdiction | All cases affecting ambassadors, other public ministers and consuls, and those in which a state is a party |
| Cases with appellate jurisdiction | All other cases |
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What You'll Learn
- The jurisdiction of federal courts is defined by the Constitution, congressional statutes, and Supreme Court decisions
- Federal courts have original jurisdiction over cases arising under federal statutes, the Constitution, or treaties
- Diversity jurisdiction allows plaintiffs from one state to sue defendants from another in federal court
- The Supreme Court has original jurisdiction over cases involving ambassadors and public ministers, and cases in which a state is a party
- Federal courts can acquire jurisdiction over cases with two federal issues, even if they would not have jurisdiction over one of the issues independently

The jurisdiction of federal courts is defined by the Constitution, congressional statutes, and Supreme Court decisions
The jurisdiction of federal courts in the United States is defined by the Constitution, congressional statutes, and Supreme Court decisions. The US Constitution establishes a federal system of government, where power is shared between the federal and state governments, each with its own court system. The Constitution grants the Supreme Court original jurisdiction over cases affecting ambassadors, other public ministers, and consuls, as well as cases in which a state is a party. The remaining cases fall within the Court's appellate jurisdiction.
Article III of the Constitution outlines nine types of "cases" and "controversies" that the federal courts have jurisdiction over. These include cases arising under the Constitution, laws, and treaties of the United States, as well as those involving admiralty and maritime jurisdiction. It also includes controversies where the United States is a party, between different states, or between citizens of different states.
Congress has also played a role in defining the jurisdiction of federal courts through the passage of various statutes, such as the Judiciary Act of 1789, which outlines the process for cases entering federal courts. This act allows cases to be filed originally in federal court, removed from state court, or appealed from the highest state court to the Supreme Court. Congress has continued to pass laws that redefine federal court jurisdiction within the limits set by the Constitution.
Additionally, the Supreme Court's decisions have further established rules and doctrines that govern federal court jurisdiction. For example, the Supreme Court has ruled on issues of due process and habeas corpus, influencing when and how lower federal courts can assume jurisdiction. The Supreme Court also has the authority to decide on the constitutionality of federal laws, which can impact the jurisdiction of federal courts.
It is important to note that the federal court system consists of the Supreme Court, appellate courts (also known as courts of appeals), and district or trial courts. Each of these courts plays a specific role in the federal judiciary, with the Supreme Court being the highest court in the nation.
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Federal courts have original jurisdiction over cases arising under federal statutes, the Constitution, or treaties
The federal court system in the United States is a complex and multi-layered structure, with a variety of courts serving different purposes and having different jurisdictions. Federal courts have original jurisdiction over cases arising under federal statutes, the Constitution, or treaties. This means that they are the starting point for any legal matter that falls under these categories.
The Constitution of the United States, specifically Article III, grants the federal courts the power to hear "all cases, in law and equity, arising under this Constitution, [and] the laws of the United States..." This is known as "federal question jurisdiction" and it gives federal courts the authority to interpret and apply federal law, including the Constitution and treaties. The Supreme Court has interpreted this clause broadly, allowing federal courts to hear a wide range of cases with a federal element.
However, it's important to note that the jurisdiction of federal courts is not unlimited. While they have original jurisdiction in certain cases, the Supreme Court also has appellate jurisdiction in other cases, where it reviews decisions made by lower courts. Additionally, Congress has passed numerous statutes over the years to redefine the jurisdiction of federal courts within the limits set by the Constitution. The Supreme Court has also established rules and doctrines to govern federal court jurisdiction.
Furthermore, there are other ways for a case to be heard in federal court. One example is "diversity jurisdiction," which allows a plaintiff from one state to file a lawsuit in federal court when the defendant is located in a different state. This ensures that cases with interstate parties can be heard in a neutral federal forum. However, there are specific requirements for this, such as the "amount in controversy" exceeding $75,000.
In conclusion, federal courts play a crucial role in interpreting and applying federal law, including the Constitution and treaties. Their original jurisdiction over cases arising under federal statutes, the Constitution, or treaties ensures that these matters are handled by courts with the appropriate authority and expertise. However, the federal court system is dynamic, with overlapping jurisdictions and various avenues for cases to be heard, ensuring flexibility and accessibility for litigants across the nation.
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Diversity jurisdiction allows plaintiffs from one state to sue defendants from another in federal court
The jurisdiction of federal courts is defined by the Constitution, congressional statutes, and decisions of the Supreme Court of the United States. 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". Diversity jurisdiction is a form of subject-matter jurisdiction that allows plaintiffs from one state to sue defendants from another in federal court. It is based on Article III, Section 2, Clause 1 of the U.S. Constitution, which grants federal courts jurisdiction over "cases and controversies".
Diversity jurisdiction allows a plaintiff to file a lawsuit in federal court when the defendant is located in a different state. It requires complete diversity between the parties to the lawsuit, meaning that all plaintiffs must be located in different states than all defendants. In other words, there must be ""diversity of citizenship" between the parties. This concept of diversity jurisdiction arose due to the differences in culture, laws, and hostility between the various states in the eighteenth century.
Additionally, the lawsuit's "amount in controversy" must be more than $75,000, exclusive of interest and costs, and without considering counterclaims. This amount has been regularly increased over the past two centuries. If the amount is left unspecified, the defendant may sometimes be able to remove the case to federal court. The court will use the legal certainty test to decide whether the dispute is over $75,000. If a plaintiff or co-defendant opposes removal, they may request a remand, asking the federal court to send the case back to the state court.
It is important to note that diversity jurisdiction is one of two ways federal courts may hear disputes. The other way is through "federal question" jurisdiction, which involves cases arising under federal laws, the Constitution, and treaties.
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The Supreme Court has original jurisdiction over cases involving ambassadors and public ministers, and cases in which a state is a party
The jurisdiction of the federal courts in the United States is defined by the Constitution, congressional statutes, and decisions of the Supreme Court. Article III, Section II of the Constitution establishes the jurisdiction of the Supreme Court, which includes original and appellate jurisdiction. Original jurisdiction refers to the legal ability to hear a case for the first time, while appellate jurisdiction refers to the ability to review a case decided by a lower court.
The Supreme Court has original jurisdiction over cases involving ambassadors, public ministers, and consuls, as outlined in Article III of the Constitution. This means that the Supreme Court is the starting point for legal proceedings involving these individuals. However, it's important to note that this jurisdiction only applies to persons accredited to the United States by foreign governments and not the other way around. Additionally, the Supreme Court's jurisdiction in these cases has been original but not exclusive since 1978. This means that while the Supreme Court can hear these cases, other courts may also have concurrent jurisdiction.
The Supreme Court also has original jurisdiction in cases where a state is a party. This includes suits under the law of nations against ambassadors and public ministers or their servants, as well as controversies of a civil nature involving a state. The Supreme Court's original jurisdiction in these cases was once exclusive, but since 1978, it has been concurrent with other courts.
The Supreme Court's original jurisdiction over cases involving ambassadors and public ministers has been the subject of several notable cases. For example, in United States v. Ortega, the Court ruled that prosecuting someone for violating international law and US law by "offering violence" to a foreign minister was not a suit "affecting" the minister but rather a public prosecution for vindication of the law. In another case, Ex parte Gruber, the Court held that its jurisdiction only applied to persons accredited to the United States by foreign governments and not the other way around.
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Federal courts can acquire jurisdiction over cases with two federal issues, even if they would not have jurisdiction over one of the issues independently
The jurisdiction of federal courts in the United States has been defined by the Constitution, congressional statutes, and decisions of the Supreme Court. Article III of the Constitution, specifically Section 2, states that federal courts can hear "all cases, in law and equity, arising under this Constitution, [and] the laws of the United States." This is referred to as "federal question jurisdiction."
Over the years, Congress has passed numerous statutes redefining the jurisdiction of federal courts within the limits set by the Constitution. The Supreme Court has also played a significant role in shaping the jurisdiction of federal courts through its decisions and interpretations of constitutional language.
One important aspect of federal court jurisdiction is the concept of "pendent jurisdiction" or "ancillary jurisdiction." This doctrine allows federal courts to acquire jurisdiction over an entire case presenting two federal issues, even if they would not have had jurisdiction over one of the issues independently. In other words, if a case includes a federal claim that is substantial enough to confer jurisdiction, federal courts can also decide related state claims.
Another variant of pendent jurisdiction is the doctrine of "pendent parties," where a federal court can take jurisdiction of a state claim against one party if it is closely related to a federal claim against another party, even without an independent jurisdictional base for the state claim. This doctrine was initially met with skepticism by the Supreme Court but was later affirmed through congressional enactment.
Additionally, federal courts can acquire jurisdiction through "diversity jurisdiction." This allows a plaintiff from one state to file a lawsuit in federal court when the defendant is located in a different state, provided that the "amount in controversy" exceeds a certain threshold, typically $75,000.
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Frequently asked questions
Yes, the jurisdiction of federal courts has been defined by the Constitution, along with congressional statutes and decisions of the Supreme Court of the United States.
The Supreme Court has original jurisdiction over cases affecting ambassadors, other public ministers, and consuls, and cases in which a state is a party. The remainder of cases are within the court's appellate jurisdiction.
Federal trial courts have been established for specific subject areas. Each federal district also has a bankruptcy court for those proceedings.
Diversity jurisdiction allows a plaintiff of one state to file a lawsuit in federal court when the defendant is located in a different state. The defendant can also seek to "remove" from state court for the same reason.
Ancillary jurisdiction allows federal courts to acquire jurisdiction over a case presenting two federal issues, even if the court would typically not have jurisdiction over one of the issues.



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