Federal court is the national judicial system created by Article III of the United States Constitution to hear cases involving federal law, the Constitution, and certain disputes that cross state lines. It operates separately from the state court systems that exist in all 50 states and includes 94 trial courts, 13 appellate courts, and the U.S. Supreme Court, plus a handful of specialized courts for subjects like bankruptcy, tax, and international trade.
Federal courts cannot hear just any legal dispute. Their authority is limited to specific categories defined by the Constitution and federal statutes. If a case doesn’t fit one of those categories, it belongs in state court.
How Federal Court Differs From State Court
Most legal disputes in the United States are handled in state courts, not federal ones. State courts take the vast majority of criminal prosecutions, family law matters, contract disputes, personal injury lawsuits, probate cases, and traffic violations. Federal courts handle a narrower slice of cases that federal law specifically assigns to them.
The differences go beyond subject matter. Federal judges are nominated by the President and confirmed by the Senate, and they serve for life. State court judges, depending on the state, may be elected, appointed to fixed terms, or chosen through some mix of the two. Federal courts follow the Federal Rules of Civil Procedure and Federal Rules of Evidence, while each state court system has its own procedural rules. Those differences affect how discovery works, how motions are handled, and how long a case takes to reach trial.
What Kinds of Cases Federal Courts Hear
Federal jurisdiction falls into a few main categories. Knowing which one applies tells you whether a case belongs in federal court at all.
Federal Question Cases
Any civil lawsuit that raises an issue under the U.S. Constitution, a federal statute, or a U.S. treaty can be filed in federal court. Civil rights claims, challenges to federal regulations, immigration disputes, federal tax controversies, and federal criminal prosecutions all qualify. The federal issue has to be central to the case, not a passing reference.1Office of the Law Revision Counsel. 28 U.S. Code 1331 – Federal Question
Diversity Cases
Even when a lawsuit involves only state law, a federal court can hear it if the opposing parties are citizens of different states (or one party is a foreign citizen) and the amount in dispute exceeds $75,000, not counting interest and court costs. Congress created this category to give out-of-state parties a neutral forum, so neither side has a home-court advantage.2Office of the Law Revision Counsel. 28 USC 1332 – Diversity of Citizenship; Amount in Controversy; Costs
Cases That Can Only Be Filed in Federal Court
Some matters belong exclusively to federal courts. Patent and copyright disputes are the clearest example; no state court can hear them, regardless of the dollar amount involved.3Office of the Law Revision Counsel. 28 USC 1338 – Patents, Plant Variety Protection, Copyrights, Mask Works, Designs, Trademarks, and Unfair Competition Admiralty and maritime cases also fall into this category.4Office of the Law Revision Counsel. 28 USC 1333 – Admiralty, Maritime, and Prize Cases So do lawsuits seeking money damages from the U.S. government, including claims brought under the Federal Tort Claims Act.5Office of the Law Revision Counsel. 28 U.S. Code 1346 – United States as Defendant
How the Federal Court System Is Structured
The federal courts are organized in three tiers. Cases start at the bottom and can move up through appeals.
U.S. District Courts
The 94 U.S. district courts are the trial courts of the federal system. Every state has at least one, and larger states have as many as four. District court is the only level where witnesses testify, juries hear evidence, and a judge or jury decides what actually happened. Most federal cases end here, through settlement, dismissal, or a final judgment after trial.6United States Courts. FAQs: Court Information
District judges share the workload with federal magistrate judges, who handle pretrial motions, discovery disputes, settlement conferences, and preliminary hearings in criminal cases. In civil cases, a magistrate judge can preside over a full trial and enter final judgment if both sides consent. In criminal cases, magistrate judges handle misdemeanor trials and conduct initial appearances, bail hearings, and arraignments for felony cases.7Office of the Law Revision Counsel. 28 USC 636 – Jurisdiction, Powers, and Temporary Assignment
U.S. Courts of Appeals
A party who loses in district court can appeal to one of the 13 U.S. Courts of Appeals, often called circuit courts. These courts do not hold new trials or hear new evidence. A panel of three judges reviews the trial record to decide whether the lower court applied the law correctly.8Office of the Law Revision Counsel. 28 U.S. Code 41 – Number and Composition of Circuits
Twelve of the circuits cover specific geographic regions. The D.C. Circuit hears many cases involving federal agencies. The thirteenth, the Federal Circuit, handles specialized subjects like patent appeals and government contract disputes regardless of where the case originated. A circuit court’s decision binds all district courts within its territory, which means the same federal law can be interpreted differently in different parts of the country until the Supreme Court steps in.
The U.S. Supreme Court
The Supreme Court sits at the top of the system with nine justices. Most cases arrive through a petition for a writ of certiorari, a request for the Court to review a lower court’s decision. The justices have almost complete discretion over which cases they take, accepting roughly 100 to 150 of the more than 7,000 petitions filed each year.9United States Courts. Supreme Court Procedures When the Supreme Court rules, its decision binds every federal and state court in the country.
Specialized Federal Courts
Several federal courts sit outside the standard three-tier structure, each handling a narrow category of cases.
The 90 U.S. bankruptcy courts operate as units of the district courts, handling cases for individuals and businesses that cannot pay their debts. They offer two main paths: liquidation, where assets are sold to pay creditors, and reorganization, where a judge approves a repayment plan over time.10United States Courts. About U.S. Bankruptcy Courts District courts hold the underlying jurisdiction over all bankruptcy matters but refer virtually all of them to the bankruptcy courts for day-to-day management.11Office of the Law Revision Counsel. 28 USC 1334 – Bankruptcy Cases and Proceedings
The U.S. Tax Court lets taxpayers challenge an IRS determination that they owe additional tax without paying the disputed amount first. If the IRS sends you a notice of deficiency, you generally have 90 days to file a petition with the Tax Court. That is a meaningful difference from most other courts, where you have to pay the tax first and then sue for a refund. The Tax Court is an Article I court created by Congress rather than an Article III court, so its judges serve 15-year terms rather than lifetime appointments.12United States Tax Court. Guidance for Petitioners: Starting a Case
The U.S. Court of International Trade handles disputes over customs duties, tariffs, embargoes, and other trade laws, with exclusive jurisdiction over civil lawsuits against the United States arising from import transactions and international trade regulations.13Office of the Law Revision Counsel. 28 USC Chapter 95 – Court of International Trade
Who Federal Judges Are and How They Get the Job
Federal judges are not elected. The President nominates candidates, and the Senate votes to confirm or reject them. The same process applies to district judges, circuit judges, and Supreme Court justices.14Congress.gov. Constitution Annotated – Overview of Appointments Clause
Once confirmed, Article III judges serve during “good behavior,” which in practice means a lifetime appointment. A federal judge cannot be fired for making unpopular decisions. The only removal mechanism is impeachment: the House of Representatives votes to impeach by simple majority, then the Senate holds a trial, and removal requires a two-thirds vote. This has happened only a handful of times in American history, typically for serious personal misconduct like perjury or bribery, not for how a judge ruled in a case.15Congress.gov. Constitution Annotated – Overview of Good Behavior Clause
Magistrate judges are the exception. They are appointed by the district court’s judges to renewable eight-year terms rather than receiving lifetime appointments, because they exercise authority delegated by district judges rather than holding independent constitutional power.
What It Costs to Use Federal Court
Filing a civil case in federal district court costs $405, which includes a $350 filing fee and a $55 administrative fee. If you cannot afford the fee, you can ask the court for permission to proceed “in forma pauperis,” which waives the upfront cost. You’ll need to file an affidavit detailing your income, assets, and expenses to show that you genuinely cannot pay.16Office of the Law Revision Counsel. 28 USC 1915 – Proceedings in Forma Pauperis
The filing fee is just the start. Federal litigation typically involves costs for serving the other party, obtaining transcripts, copying court records, and potentially hiring expert witnesses. Attorney fees are usually the biggest expense. Hourly rates vary widely based on location and experience, and federal cases tend to run more expensive than comparable state court cases because of the procedural complexity involved.
Representing Yourself in Federal Court
You have the right to represent yourself without a lawyer, which is called proceeding “pro se.” Courts hold self-represented litigants to the same deadlines and procedural rules as attorneys, though judges sometimes apply a somewhat more forgiving standard when evaluating filings from people without legal training.
If you go this route, you are responsible for learning and following the Federal Rules of Civil Procedure, the Federal Rules of Evidence, and the local rules of the specific district court handling your case. Court clerks can answer basic procedural questions but are prohibited from giving legal advice. Most federal district courts maintain a section on their website with forms and guides for self-represented litigants. Filing deadlines are strictly enforced, and missing one can result in your case being dismissed.