The US federal court system is the judicial branch of the national government, built on three levels under Article III of the Constitution: district courts where cases are tried, courts of appeals that review those decisions, and the Supreme Court at the top.1Congress.gov. U.S. Constitution – Article III Federal courts exist to interpret federal law uniformly across the country, so a statute passed by Congress means the same thing in Oregon as it does in Florida. They can only hear cases that fall into specific categories Congress has authorized, which is what separates them from state courts.
The Three Levels of Federal Courts
A federal case normally starts at the trial level, can be appealed once as of right, and may reach the Supreme Court only if the justices decide to take it.
District Courts
District courts are the trial courts of the federal system. They’re the only level where witnesses testify, juries hear evidence, and judges or juries deliver verdicts. There are 94 federal judicial districts covering all 50 states, the District of Columbia, and U.S. territories including Puerto Rico, Guam, the U.S. Virgin Islands, and the Northern Mariana Islands.2United States Courts. Court Role and Structure Every state has at least one district; California has four.
District courts handle both civil and criminal matters. A civil case might involve a business suing over a broken contract. A criminal case might be a federal drug prosecution or a fraud charge brought by the U.S. Attorney’s Office. If you’re involved in a federal case, this is almost certainly where it begins.
Courts of Appeals
When a party believes the trial court got the law wrong, they can appeal. The 13 U.S. Courts of Appeals review district court decisions, but they don’t retry cases. No new witnesses, no new evidence, no jury. A panel of three judges reads the written arguments, reviews the trial record, and decides whether the lower court applied the law correctly.3United States Courts. About the U.S. Courts of Appeals
Twelve circuits cover specific geographic regions. The Second Circuit, for example, hears appeals from district courts in New York, Connecticut, and Vermont. The thirteenth, the Federal Circuit, has nationwide jurisdiction over specialized subject areas like patent disputes and appeals from the Court of International Trade and the Court of Federal Claims.3United States Courts. About the U.S. Courts of Appeals
Occasionally the full group of active judges in a circuit will rehear a case rather than leave it to the original three-judge panel. This is called an en banc hearing and is deliberately uncommon. Under the Federal Rules of Appellate Procedure, it’s only appropriate when the panel’s decision conflicts with prior rulings from the same circuit or the Supreme Court, or when the case raises a question of exceptional importance.4Office of the Law Revision Counsel. Federal Rules of Appellate Procedure Rule 35 – En Banc Determination
The Supreme Court
The Supreme Court is the final stop. Its decisions bind every other federal and state court.5Supreme Court of the United States. About the Court The Court controls its own docket through certiorari. A party who loses at the appellate level can petition the Court to take the case, but most petitions are denied. Under the Rule of Four, at least four of the nine justices must vote to hear a case before it’s accepted.6United States Courts. Supreme Court Procedures
The Court gravitates toward cases where different appellate circuits have reached conflicting interpretations of the same federal law, or where a case raises a constitutional question with nationwide stakes. Once the Court rules, that interpretation is settled unless Congress changes the statute or the Court later overrules itself.
What Cases Federal Courts Can Hear
Federal courts can’t hear just any dispute. If a case doesn’t fit one of the categories Congress has defined, the court has to dismiss it or send it back to state court regardless of how strong the underlying claim might be.
Federal Question Cases
The most straightforward path into federal court is a claim arising under the Constitution, a federal statute, or a treaty. Under 28 U.S.C. § 1331, district courts have original jurisdiction over all civil actions arising under federal law.7Office of the Law Revision Counsel. 28 USC 1331 – Federal Question That covers civil rights lawsuits, securities fraud claims, immigration disputes, federal environmental violations, and much else. There’s no minimum dollar amount. If the claim is based on federal law, the door is open.
Diversity Cases
Federal courts can also hear disputes between parties from different states, even when the claim itself involves only state law. The idea is that if a resident of Texas sues a company based in New York, neither party should have to worry about home-court advantage. Under 28 U.S.C. § 1332, this diversity jurisdiction requires two things: no plaintiff can share the same state of citizenship as any defendant, and the amount at stake must exceed $75,000, not counting interest and court costs.8Office of the Law Revision Counsel. 28 USC 1332 – Diversity of Citizenship; Amount in Controversy; Costs
Courts enforce the “complete diversity” requirement strictly. If even one plaintiff is from the same state as one defendant, the case doesn’t qualify. Cases involving foreign citizens or foreign governments can also qualify under the same statute.8Office of the Law Revision Counsel. 28 USC 1332 – Diversity of Citizenship; Amount in Controversy; Costs
Removing a Case from State Court
Sometimes a case that could be filed in federal court starts in state court instead. The defendant can move it to federal court through a process called removal. Under 28 U.S.C. § 1441, any civil action filed in state court that meets the requirements for federal jurisdiction can be removed to the federal district court covering that location.9Office of the Law Revision Counsel. 28 USC 1441 – Removal of Civil Actions
The deadline is tight. A defendant generally has 30 days after being served with the complaint to file a notice of removal.10Office of the Law Revision Counsel. 28 U.S. Code 1446 – Procedure for Removal of Civil Actions Miss that window and the case stays in state court. There’s also a limit for diversity-based removals: if any defendant is a citizen of the state where the lawsuit was filed, removal is blocked.9Office of the Law Revision Counsel. 28 USC 1441 – Removal of Civil Actions If the federal court later determines it lacks jurisdiction, the case is sent back to state court through an order called a remand.
How a Federal Criminal Case Moves
Federal criminal prosecutions run on a different track than civil cases, with stages built in specifically to check the government’s power before it can take someone to trial.
The Grand Jury
The Fifth Amendment requires that serious federal criminal charges be brought through an indictment returned by a grand jury.11Legal Information Institute. Fifth Amendment – U.S. Constitution A federal grand jury consists of 16 to 23 citizens, and at least 12 of them must agree that probable cause exists before the government can formally charge someone.12Legal Information Institute. Federal Rules of Criminal Procedure Rule 6 – The Grand Jury The grand jury doesn’t decide guilt. It decides whether there’s enough evidence to justify a trial.
Grand jury proceedings are one-sided. The prosecutor presents evidence and witnesses, but the accused typically has no right to be present, cross-examine witnesses, or offer a defense.
From Arrest to Sentencing
After an arrest on federal charges, the defendant must be brought before a magistrate judge for an initial appearance as soon as practicable and no later than 72 hours after arrest.13Federal Bureau of Investigation. A Brief Description of the Federal Criminal Justice Process The judge advises the defendant of the charges, explains the right to counsel and the right to remain silent, and decides whether the defendant will be released or detained pending trial.
If the case proceeds to conviction, sentencing follows the U.S. Sentencing Guidelines, which use a grid accounting for the seriousness of the offense and the defendant’s criminal history to produce a recommended range. Since the Supreme Court’s 2005 decision in United States v. Booker, the guidelines are advisory rather than mandatory. Judges must consider them but can impose a sentence above or below the range if they explain their reasoning.
If you’re charged with a federal crime and cannot afford an attorney, the Sixth Amendment guarantees your right to court-appointed counsel. Under the Criminal Justice Act, the federal court system funds public defenders and private panel attorneys who represent defendants who cannot pay for their own.14United States Courts. Defender Services
Who Runs the Courtroom
Article III Judges
The judges who preside over federal trials and appeals hold their positions under Article III of the Constitution, which gives them lifetime tenure. They can only be removed through impeachment. A judge who cannot be fired for an unpopular ruling is free to follow the law wherever it leads.15United States Courts. Types of Federal Judges
The President nominates Article III judges, and the Senate must confirm them before they take the bench.15United States Courts. Types of Federal Judges This applies to district judges, circuit judges, and Supreme Court justices alike.
Magistrate Judges
U.S. Magistrate Judges handle much of the day-to-day work in federal district courts. They’re appointed by the district court judges for renewable eight-year terms. They issue search warrants, conduct initial appearances in criminal cases, rule on pretrial motions, and set bail. They can also preside over full civil trials when both sides consent in writing.16United States District Court. What is the Difference Between a Federal District Court Judge and a Magistrate Judge
The Clerk’s Office
The Clerk of Court manages the administrative backbone of each courthouse: processing filings, maintaining official records, managing jury selection, and keeping the court calendar running. For anyone trying to access public records or file documents, the clerk’s office is the first point of contact.
Specialized Federal Courts
Some legal disputes are too technical or too narrow for the general district courts. Congress has created several specialized courts with limited jurisdiction to handle them.
Bankruptcy Courts
Bankruptcy courts operate as units of the federal district courts and handle all cases involving debt relief. Chapter 7 liquidation, where a trustee sells assets to pay creditors, and Chapter 11 reorganization, where a business or individual restructures debts under a court-approved plan, are the most common paths.17United States Courts. Process – Bankruptcy Basics
U.S. Tax Court
If the IRS sends you a notice saying you owe more taxes than you reported, you can challenge that determination in the U.S. Tax Court before paying a dime. This is the key advantage over other venues: you don’t have to pay the disputed amount first and then sue for a refund.18United States Tax Court. Guidance for Petitioners – Starting a Case
Court of International Trade
The U.S. Court of International Trade handles civil actions involving federal trade law, including disputes over tariffs, the classification of imported goods, and anti-dumping duties. It sits in New York City, but its jurisdiction extends nationwide and it can even hold hearings in foreign countries.19United States Court of International Trade. About the Court
Court of Federal Claims
When someone believes the federal government owes them money, the Court of Federal Claims is often the place to go. It hears contract disputes with the government, claims that the government took private property without fair compensation, military and civilian pay disputes, tax refund suits, and vaccine injury claims, among others.20United States Court of Federal Claims. Frequently Asked Questions
Foreign Intelligence Surveillance Court
The Foreign Intelligence Surveillance Court operates largely in secret. It reviews government applications for electronic surveillance and physical searches related to national security and foreign intelligence investigations.21Foreign Intelligence Surveillance Court. Foreign Intelligence Surveillance Court The court consists of 11 federal district judges appointed by the Chief Justice of the Supreme Court, each serving a maximum seven-year term. Most proceedings and opinions are classified.
Multidistrict Litigation
When similar federal lawsuits are filed in district courts across the country, the Judicial Panel on Multidistrict Litigation can consolidate them before a single judge for pretrial proceedings. Under 28 U.S.C. § 1407, the panel transfers cases that share common factual questions to one district for coordinated handling, which prevents conflicting rulings and duplicated discovery work.22Office of the Law Revision Counsel. 28 USC 1407 – Multidistrict Litigation Large product liability cases, pharmaceutical litigation, and data breach lawsuits frequently end up in MDL proceedings. After pretrial work is complete, cases that haven’t settled are supposed to be sent back to their original districts for trial.
Filing Fees and Public Access
Federal courts charge fees to file cases. A civil complaint in a U.S. District Court currently costs $405 total, which includes a $55 administrative fee set by the Judicial Conference.23United States Courts. District Court Miscellaneous Fee Schedule Filing an appeal in a U.S. Court of Appeals costs $605: a $600 docketing fee plus a $5 statutory fee.24United States Courts. Court of Appeals Miscellaneous Fee Schedule These fees are just the starting point once attorney fees, deposition transcripts, and expert witnesses are added in.
If you cannot afford filing fees, you can ask the court for permission to proceed “in forma pauperis,” which means without prepayment. You’ll need to submit an affidavit detailing your financial situation. The court has discretion to grant or deny the request, and it can dismiss the case at any time if the claim turns out to be frivolous or the poverty claim is false.25Office of the Law Revision Counsel. 28 U.S. Code 1915 – Proceedings in Forma Pauperis Prisoners who file in forma pauperis are still required to pay the full filing fee over time through installments deducted from their prison accounts.
Federal court records are available to the public through PACER (Public Access to Court Electronic Records). Anyone can register for a PACER account and search for case documents, docket sheets, and filings from nearly every federal court. PACER charges $0.10 per page, with a cap of $3.00 per document, and if your total charges for a quarter stay at $30 or less the fees are waived entirely.26United States Courts. Electronic Public Access Fee Schedule Attorneys and other authorized filers submit documents through a companion system called CM/ECF (Case Management/Electronic Case Files), which requires a PACER account plus special access credentials issued by the specific court.27United States Courts. Electronic Filing (CM/ECF) Some courts also allow pro se litigants to file electronically, though policies vary by district.