The federal court system is the national judiciary of the United States, established by Article III of the Constitution to interpret and apply federal law across the country. It runs in three tiers: 94 district courts at the trial level, 13 courts of appeals in the middle, and the Supreme Court at the top. It operates alongside 50 separate state court systems, and it hears only cases that fall within a narrow set of categories defined by the Constitution and federal statutes.
Federal Courts Versus State Courts
Most legal disputes in the country never touch a federal courtroom. State courts handle the vast majority of criminal cases, personal injury lawsuits, divorces, contract fights, and probate matters. Federal courts take a narrower slice: cases that involve federal law, the Constitution, or specific types of parties such as residents of different states.
The way judges reach the bench differs too. Federal judges are nominated by the President and confirmed by the Senate, and most serve for life. State court judges, depending on the state, may be elected, appointed for a fixed term, or chosen through some combination. Lifetime tenure for federal judges was a deliberate design choice, meant to insulate them from political pressure.
One boundary matters for anyone thinking about appeals. The Supreme Court of the United States has the final word on questions of federal constitutional law, even when those questions arise inside a state court case. State supreme courts are the final authority on their own state’s laws, but if a state court decision turns on the meaning of the U.S. Constitution or a federal statute, the losing side can ask the Supreme Court to review it.
The Three Tiers
District Courts
District courts are where federal cases begin. They are the trial courts, the level where witnesses testify, juries deliberate, and judges make initial rulings. The country is divided into 94 federal judicial districts, with at least one in every state, plus the District of Columbia and several U.S. territories.
These courts hear both civil and criminal matters. A patent infringement lawsuit, a federal drug prosecution, and a civil rights claim all start at this level. A district judge manages the case from pretrial motions through trial and either sentencing or judgment.
Courts of Appeals
When a party believes the district court got the law wrong, they can appeal to one of the 13 federal courts of appeals. Twelve cover geographic regions called circuits. The thirteenth, the Federal Circuit, handles specialized appeals nationwide, including patent cases and claims against the government. A panel of three circuit judges reviews the written record from the trial court and decides whether the law was applied correctly. No new witnesses testify and no new evidence comes in.
In rare cases, all the active judges of a circuit rehear a case together in what’s called an en banc hearing, typically reserved for exceptionally important questions or panel decisions that conflict with prior rulings from the same circuit.
The Supreme Court
Nine justices sit on the Supreme Court, and their decisions bind every other court in the country. The Court has a small category of original jurisdiction: cases involving ambassadors and disputes between states go directly there. The overwhelming majority of its work, though, is appellate. Parties ask the Court to take their case by filing a petition for a writ of certiorari. Thousands of petitions come in each year, and the Court agrees to hear only a small fraction, focusing on unresolved questions of federal law or conflicts among the circuit courts.
What Cases Belong in Federal Court
Federal courts do not have open-ended authority to hear any dispute. Their jurisdiction is limited to specific categories, and a case that doesn’t fit must be dismissed even if both sides want to be there.
Federal Question Jurisdiction
The broadest category covers any civil case arising under the Constitution, laws, or treaties of the United States. That includes civil rights lawsuits, constitutional challenges, securities fraud, immigration disputes, federal tax controversies, and prosecutions for federal crimes such as bank robbery or wire fraud.
Diversity Jurisdiction
Federal courts can also hear disputes between citizens of different states, or between a U.S. citizen and a foreign citizen, when the amount at stake exceeds $75,000. The rule exists to address the concern that a state court might favor its own residents over outsiders in a significant lawsuit. Both requirements must be satisfied: complete diversity of citizenship, meaning no plaintiff and defendant from the same state, plus the dollar threshold.
Cases Involving the Federal Government
When the United States is a party, whether as plaintiff or defendant, the case belongs in federal court. Suits for negligence against the federal government (say, a car accident with a postal truck) run through the Federal Tort Claims Act, which requires filing an administrative claim with the relevant agency within two years of the incident before any lawsuit can proceed.
Other Categories
Federal jurisdiction also reaches admiralty and maritime disputes, bankruptcy cases, and controversies between two or more states. Admiralty covers incidents on navigable waters and disputes arising from maritime commerce. Disputes between states go directly to the Supreme Court under its original jurisdiction.
How a Case Gets Into Federal Court
Filing Directly
The most direct path is filing in federal district court from the start. The plaintiff pays a filing fee and submits a complaint that establishes why the federal court has jurisdiction. A plaintiff who cannot afford the fee can ask permission to proceed in forma pauperis by submitting an affidavit showing an inability to pay; the court may waive the fee entirely for non-prisoners, and for incarcerated individuals may arrange for installment payments from a prison trust account.
Removal from State Court
Sometimes a case that could have been filed in federal court is filed in state court instead. The defendant can then remove it to the nearest federal district court by filing a notice of removal within 30 days of being served with the complaint. There is one important restriction in diversity cases: if any defendant is a citizen of the state where the lawsuit was filed, removal is not allowed. A local defendant does not need the protection diversity jurisdiction was designed to provide.
Who Serves as a Federal Judge
Article III Judges
District judges, circuit judges, and Supreme Court justices are all nominated by the President and confirmed by the Senate. They serve “during good Behaviour,” language from Article III that the Supreme Court has read as life tenure, subject only to removal through impeachment. Congress cannot cut their pay while they are in office. These protections exist so judges can make unpopular decisions without fearing professional consequences.
Magistrate and Bankruptcy Judges
Not every federal judicial officer holds a lifetime appointment. Magistrate judges are appointed by the district judges of their court to renewable eight-year terms. They handle a large share of work that would otherwise fall to district judges: issuing search warrants, conducting initial appearances in criminal cases, managing pretrial motions, and, with the parties’ consent, presiding over entire civil trials.
Bankruptcy judges are appointed by the court of appeals for their circuit to 14-year terms and serve as judicial officers of the district court. They handle all bankruptcy proceedings within their district.
Specialized Courts Within the System
Several courts focus on narrow categories of cases, staffed by judges with deep expertise in those areas.
Every federal judicial district has a bankruptcy court operating as a unit of the district court. These courts handle all cases filed under the Bankruptcy Code, from individuals seeking a fresh start through liquidation to corporations reorganizing debt.
The United States Tax Court lets a taxpayer challenge an IRS notice of deficiency without paying the disputed amount first. In most other courts, you would need to pay the tax and then sue for a refund. Taxpayers have 90 days from the date of the notice, or 150 days if they are outside the country, to file a petition.
The Court of Federal Claims hears money claims against the federal government, covering contract disputes with agencies, takings claims, military and civilian pay disputes, tax refund suits, vaccine injury claims, and patent cases against the United States.
The Court of International Trade has exclusive jurisdiction over civil cases involving customs duties, tariffs, import restrictions, and trade agreement disputes.
The Court of Appeals for Veterans Claims reviews unfavorable decisions from the Board of Veterans’ Appeals, examining the existing record to determine whether the Board applied the law correctly. Further appeals go to the Federal Circuit and, potentially, the Supreme Court.
Deadlines That Can End a Case
Federal court deadlines are rigid, and missing one can end a case regardless of its merits. The most consequential is the deadline to appeal. In a civil case, a party has 30 days from the date judgment is entered to file a notice of appeal with the district court. When the federal government is a party, that window extends to 60 days. Miss it, and the right to appeal is almost always gone for good.
The deadline for removing a case from state court is equally strict: 30 days from the date the defendant receives the complaint. Whether that deadline can ever be extended for good cause has been debated, but the safest assumption is that it cannot.
Tort claims against the federal government must be filed administratively within two years of the injury. For claims that borrow a statute of limitations from state law, such as many civil rights claims, the filing window typically comes from the state’s personal injury deadline, which in most states runs between one and three years.
Accessing Federal Court Records
Federal court documents are available to the public through PACER (Public Access to Court Electronic Records), an online system run by the federal judiciary. Access costs $0.10 per page, capped at $3.00 per individual document. Quarterly charges of $30 or less are waived, and most PACER users fall under that threshold.
PACER covers docket sheets, motions, orders, opinions, and most other filings across all federal district courts, bankruptcy courts, and courts of appeals. Audio recordings of hearings are available for $2.40 per file. For anyone involved in or researching a federal case, PACER is the primary access point for the court record.