When Americans talk about “the court system,” they’re usually talking about two systems running in parallel — federal and state — with more than a hundred separate courts between them. Almost every legal dispute in the country, from a speeding ticket to a constitutional challenge, has to find its way through one of these two tracks, and knowing which one applies changes everything about how a case unfolds.
Two Systems, Not One
The United States runs a dual court system: a federal judiciary and 50 separate state judiciaries, each with its own courts, judges, and rules. State courts handle the overwhelming majority of legal matters — most criminal cases, family law, probate, contract disputes, and personal injury claims. Federal courts have a narrower, specific job: they hear cases involving the U.S. Constitution, federal laws and treaties, disputes between states, bankruptcy, and cases where the federal government itself is a party, according to the U.S. Courts website. The two systems overlap only at the edges, mainly when a state court case raises a federal constitutional question.
How the Federal Courts Are Structured
The federal judiciary has three main tiers. At the bottom are 94 U.S. district courts, spread across the states and territories, where federal trials actually happen — juries hear evidence, witnesses testify, and judges rule on the law. Above them sit 13 U.S. courts of appeals, or circuit courts, which don’t retry cases but instead review whether the district court applied the law correctly. At the top is the U.S. Supreme Court, the only court created directly by the Constitution, which has the final word on federal law and hears a small fraction of the cases it’s asked to review each year.
How a Case Moves Through It
A federal case typically starts in a district court, where it’s tried and decided. The losing side can appeal to the circuit court covering that district, which reviews the trial record for legal errors rather than re-hearing testimony. From there, a party can ask the Supreme Court to take the case, but the Court accepts only a small number of the thousands of petitions it receives annually, reserving its attention for cases with major legal significance or where lower courts disagree. State systems generally mirror this same trial-appeal-supreme court structure, just under different names in different states.
How Judges Get There
The path to the bench differs sharply between the two systems. Federal judges are nominated by the President and confirmed by the Senate, and once confirmed, they serve for life during “good behavior” — a design meant to insulate them from political pressure. State judges reach the bench through a much wider variety of methods: some are elected directly by voters, some are appointed for fixed terms, and some are appointed for life, depending on the state’s constitution. That difference reflects a basic split in philosophy — federal courts are built for independence from politics, while many state systems build in direct accountability to the public.
Why the Split Matters
The dual system isn’t a historical accident — it’s baked into the Constitution’s balance between federal and state power. It means the specific court a case lands in can shape the outcome, from which laws apply to how long the process takes. For most people, a legal problem will never leave the state system. But when a case touches federal law or the Constitution, it can climb from a local courthouse all the way to the nation’s highest court — a journey the framers built in as one more check on how the law gets applied.