What Is a Court? Jurisdiction, Hierarchy, and Enforcement

A court is a government body with legal authority to resolve disputes by applying the law, and the question of what a court is becomes clearer once you see how courts are organized, what kinds of cases each one can hear, and what powers judges actually hold. In the United States, the Constitution splits that judicial power between a federal system and fifty state systems, each with its own hierarchy. Most legal processes a person encounters, from a traffic ticket to a divorce to a lawsuit, run through one of those hierarchies.

Article III, Section 1 of the Constitution vests “the judicial Power of the United States” in “one supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish.”¹ Using that authority, Congress built the federal system out below the Supreme Court: 13 U.S. Courts of Appeals and 94 U.S. District Courts spread across the country.² State court systems operate under their own state constitutions and are structured separately.

Federal Courts and State Courts

The federal and state systems run in parallel, handling different categories of disputes. Federal courts hear cases involving the constitutionality of a law, federal statutes and treaties, disputes between states, admiralty claims, bankruptcy, and habeas corpus petitions. State courts handle most criminal prosecutions, personal injury lawsuits, contract disputes, family law matters like divorce and custody, probate, and the vast majority of everyday legal conflicts.²

State courts are the final word on questions of state law and state constitutions. When a state court decision involves a federal constitutional issue, however, it can be appealed to the U.S. Supreme Court, which then decides whether to take the case. The two systems are separate but not fully independent of each other.

Jurisdiction: What Lets a Court Hear a Case

A court can only decide a case if it has jurisdiction, the legal authority to hear that particular dispute. Jurisdiction breaks into two main categories. Personal jurisdiction means the court has authority over the people or entities involved. Subject matter jurisdiction means the court is authorized to handle that type of case.³

Subject matter jurisdiction is what makes specialized courts possible. Congress limited the U.S. Tax Court to tax cases, and most states maintain separate courts for probate, traffic, juvenile matters, and small claims. A court without jurisdiction over the subject or the parties produces rulings that can be challenged and overturned retroactively, which is why jurisdictional questions often get resolved before anything else happens in a case.³

Civil Cases and Criminal Cases

Courts handle two fundamentally different kinds of disputes, and the rules for each are not interchangeable. In a criminal case, the government (federal or state) prosecutes someone accused of breaking a law. The victim is a witness, not a party controlling the case. In a civil case, one private party sues another, and the person bringing the suit controls the litigation, including whether to settle.

The burden of proof is the most consequential difference. Criminal cases require the prosecution to prove guilt “beyond a reasonable doubt,” the highest standard in the legal system. Civil cases use a lower bar called “preponderance of the evidence,” meaning the plaintiff only needs to show that their version of events is more likely true than not.⁴ That is why someone can be acquitted in a criminal trial and still lose a civil lawsuit over the same conduct.

The outcomes differ too. Criminal courts impose penalties like fines and incarceration. Federal fines alone can reach $250,000 for a felony, and courts can impose alternative fines of up to twice the defendant’s gain or the victim’s loss when the offense involves financial harm.⁵ Civil courts award monetary damages to the injured party or issue orders requiring someone to do or stop doing something.

How Courts Are Stacked

Courts are organized in tiers, and each tier serves a different purpose. The structure exists to catch and correct errors as a case moves up.

Trial Courts

Trial courts have original jurisdiction, meaning they are the first court to hear a case. They make findings of both fact and law through a full trial that includes witness testimony, physical evidence, and legal arguments.⁶ In the federal system, the 94 district courts serve as the trial-level courts. Most cases begin and end here because most are never appealed.

Appellate Courts

Appellate courts review trial court decisions for legal errors. They do not hear new testimony or examine new evidence. The parties submit written briefs setting forth the facts and legal arguments, and the court may or may not grant oral argument.⁶ A panel of judges, typically three, decides the case collectively. In rare situations involving especially complex or important questions, an appellate court may hear a case “en banc,” meaning the full bench of judges participates rather than a three-judge panel.⁷

The Supreme Court

The U.S. Supreme Court sits at the top of the federal system. Parties who lose at the appellate level can petition the Court for a writ of certiorari, a request for the Supreme Court to order the lower court to send up the case record for review. The Court is not required to accept any case and typically only does so when a case has national significance, could resolve conflicting decisions among the federal circuits, or could set an important precedent.⁸

Four of the nine Justices must vote to accept a case. Out of more than 7,000 petitions filed each year, the Court accepts roughly 100 to 150.⁸ The overwhelming majority of petitions are denied, which means the lower court’s ruling stands.

Specialized Courts

Not every legal matter goes to a general trial court. Many disputes are funneled into courts designed to handle specific categories of cases.

Small claims courts handle low-dollar disputes, typically capping the amount a plaintiff can seek at around $10,000, though the exact limit varies by state. The process is simplified, and many people represent themselves.
Family courts handle divorce, child custody, child support, adoption, and domestic violence protection orders. One state may control custody while another handles support obligations.
Probate courts oversee the administration of estates after someone dies, including validating wills and distributing assets.
Bankruptcy courts handle bankruptcy cases in the federal system, where district courts hold jurisdiction over all such proceedings. The court has exclusive control over the debtor’s property from the moment the case is filed.⁹

Administrative Tribunals

Administrative law judges work inside federal agencies rather than the judicial branch. Created by the Administrative Procedure Act of 1946, they serve as independent decision-makers in disputes involving specific regulatory areas like Social Security disability claims, immigration, environmental protection, and securities.¹⁰ Their authority includes conducting hearings, issuing subpoenas, and producing written decisions with findings of fact and conclusions of law.

If you are denied Social Security disability benefits, for example, you can request a hearing before an administrative law judge within 60 days of receiving a reconsideration decision. The judge reviews your evidence, asks questions about your condition, and may call medical experts to testify. These hearings can be conducted online, in person, or by phone.¹¹ Administrative decisions can ultimately be appealed into the federal court system, which is how the two systems connect.

Who’s in the Courtroom

Several specialized roles keep a courtroom functioning. No single person runs the entire process alone.

The judge presides over the proceedings, rules on legal questions, decides what evidence is admissible, and instructs the jury on the applicable law. In a bench trial, with no jury, the judge also decides the facts.
The jury serves as the finder of fact in cases that go to a jury. The Supreme Court drew a firm line between these roles in Sparf and Hansen v. United States (1894): judges decide the law, and jurors apply it to the facts as they find them. The Seventh Amendment preserves the right to a jury trial in federal civil cases where the amount in dispute exceeds twenty dollars.¹²¹³
The court reporter captures every word spoken during proceedings and produces verbatim transcripts, which become the official record parties rely on for appeals.
The court clerk manages case files, dockets motions and orders, maintains the official record, and handles scheduling. In federal courts, the clerk also oversees jury operations, including qualifying and summoning jurors.
The bailiff maintains security in the courtroom, keeps order during proceedings, and oversees the custody of defendants who are in custody during hearings.

Representing Yourself

You do not always need a lawyer to appear in court. Federal law gives every party the right to “plead and conduct their own cases personally” in any federal court.¹⁴ A person who does this is called a pro se litigant. There are limits. Corporations and partnerships must have a lawyer, you cannot represent a class in a class action without one, and a non-attorney parent generally cannot appear on behalf of a child.¹⁵ Courts hold pro se litigants to the same procedural rules as lawyers.

How Courts Enforce Their Orders

Courts need enforcement power to function, and contempt is the primary tool. Federal law authorizes courts to punish contempt by fine, imprisonment, or both for three categories of conduct: misbehavior in or near the courtroom that obstructs justice, misconduct by court officers, and disobedience of a court order.¹⁶

Contempt comes in two forms. Criminal contempt punishes past behavior, such as someone who disrupts a hearing or violates an order after the fact. Civil contempt pressures someone into future compliance, like jailing a person who refuses to turn over documents until they cooperate. Criminal contempt requires proof beyond a reasonable doubt; civil contempt uses a lower standard. A person cannot be held in contempt for violating an order that the issuing court lacked authority to enter in the first place.

When a Dispute Doesn’t Go to Court

Courts are not the only option for resolving disputes. Arbitration and mediation are the two most common alternatives, and many contracts require one or both before a party can file a lawsuit.

Arbitration uses a private neutral decision-maker instead of a judge. The process is faster, roughly seven months on average compared to two years or more for litigation, and the proceedings are private with no public record filed. The tradeoff is significant: an arbitrator’s decision is generally binding, and without evidence of fraud or bias, the losing party has almost no ability to appeal. Court litigation is slower and public, but it preserves the right to appellate review, which is often the single biggest reason parties prefer it for high-stakes disputes.

Mediation is less formal than either option. A mediator helps the parties negotiate but cannot impose a decision. If mediation fails, the dispute still heads to court or arbitration. Many courts now require mediation before trial as a way to reduce caseloads and give parties one last chance to settle on their own terms.

1
Library of Congress. U.S. Constitution – Article III
2
United States Courts. Comparing Federal and State Courts
3
Legal Information Institute. Subject Matter Jurisdiction
4
Legal Information Institute. Burden of Proof
5
Office of the Law Revision Counsel. 18 U.S.C. 3571 – Sentence of Fine
6
Legal Information Institute. Trial Court
7
Legal Information Institute. En Banc
8
United States Courts. Supreme Court Procedures
9
Office of the Law Revision Counsel. 28 U.S.C. 1334 – Bankruptcy Cases and Proceedings
10
U.S. Office of Personnel Management. Administrative Law Judge Positions
11
Social Security Administration. Request Hearing With a Judge
12
Federal Judicial Center. Juries in the Federal Judicial System
13
Library of Congress. U.S. Constitution – Seventh Amendment
14
Office of the Law Revision Counsel. 28 U.S.C. 1654
15
U.S. District Court, Southern District of New York. Representing Yourself in Federal Court (Pro Se)
16
Office of the Law Revision Counsel. 18 U.S.C. 401