State courts are the judicial systems each state establishes under its own constitution and laws to resolve disputes arising under state and local law. They handle the overwhelming majority of legal cases in the United States, from traffic tickets and small claims through divorces, probate matters, and murder trials. Federal courts, by contrast, hear only the narrow categories of cases the U.S. Constitution and Congress have assigned to them. If you ever find yourself in a courtroom, odds are you are in a state court.
Where State Courts Get Their Power
State courts draw their authority from individual state constitutions and from the structure of the federal Constitution itself. The Tenth Amendment supplies the foundation: any power not handed to the federal government or denied to the states remains with the states or the people.1Constitution Annotated. Amdt10.3.4 State Sovereignty and Tenth Amendment Because federal courts are limited to specific types of cases, state courts fill in everything else. That makes them courts of general jurisdiction, meaning they can hear almost any dispute unless a federal statute expressly reserves it for the federal system.
Geographic boundaries define a state court’s reach. An Ohio court has no power over a lawsuit that belongs in Oregon. Geography alone, though, isn’t enough to pull someone into court. Before a state court can act on a person or company, it has to establish personal jurisdiction, which generally requires that the defendant have meaningful ties to the state. The Supreme Court set that standard in International Shoe Co. v. Washington (1945), holding that a defendant must have “minimum contacts” with the forum so that requiring a defense there does not offend basic fairness.2Constitution Annotated. Amdt14.S1.7.1.4 Minimum Contact Requirements for Personal Jurisdiction For individuals, living in the state is the clearest contact. For corporations, being incorporated there or maintaining a principal place of business is enough.
How State Court Systems Are Structured
Every state has trial-level courts and at least one appellate court, though the names and specific structures vary.3Congress.gov. Federal and State Courts: Structure and Interaction Most states use a three-tier model: trial courts at the bottom, intermediate appellate courts in the middle, and a supreme court at the top.
Trial Courts
Trial courts are where cases begin. Depending on the state, they go by names like circuit court, superior court, or district court.4United States Courts. Comparing Federal and State Courts This is the only level where witnesses testify, juries hear evidence, and a judge or jury decides what actually happened. The job is fact-finding.
Most states also operate courts of limited jurisdiction beneath the general trial courts. Small claims courts handle low-dollar disputes, with maximum claim amounts ranging from as little as $2,500 to as much as $25,000 depending on the state. Municipal and magistrate courts often process minor criminal matters like traffic violations. These lower courts trade some formality for speed and accessibility. If you lose, many states allow a “trial de novo” in the general trial court, meaning the case starts over fresh rather than being reviewed for errors.
Intermediate Appellate Courts
Above the trial level, most states have intermediate appellate courts. These do not retry cases or hear new evidence. A panel of judges reviews the written record from the trial court to decide whether the law was applied correctly. If the trial judge gave wrong jury instructions or admitted evidence that should have been excluded, the appellate court can reverse the decision or order a new trial. On questions of exceptional importance, all the judges on the court may sit together in what is called en banc review.
State Supreme Courts
The highest court in each state is usually called the supreme court, though some states use different names.4United States Courts. Comparing Federal and State Courts This court of last resort has the final word on what state law means. Most state supreme courts have discretion over which cases they accept, choosing disputes that involve unsettled legal questions or significant public interest. Their decisions bind every lower court in the state.
What Kinds of Cases Go to State Court
The range of state court work is broad. While federal courts focus on a narrow band of cases, state courts are the default forum for almost every legal dispute that does not involve a specific federal question.
- Criminal law. State courts prosecute the vast majority of crimes in the country, from misdemeanor theft and DUI through felony assault, robbery, and homicide. Federal courts handle crimes involving national security, interstate drug trafficking, and similar federal interests, but ordinary violent and property crimes are state business.
- Family law. Divorce, child custody, child support, adoption, and domestic violence protection orders all move through state courts.
- Probate and estates. When someone dies, state probate courts oversee validating wills, paying debts, and distributing assets.
- Civil litigation. Contract disputes, personal injury suits, medical malpractice claims, landlord-tenant conflicts, and property boundary disagreements all land in state court. Cases range from a few thousand dollars to tens of millions.
- Traffic and minor infractions. The highest-volume category by far, processed by state and local courts every day, usually in limited-jurisdiction courts built for speed.
Specialty and Problem-Solving Courts
States have created specialty courts that focus less on punishment and more on addressing the causes of certain offenses. These problem-solving courts operate inside the state system but use a different approach than ordinary criminal proceedings.
Drug courts are the most established model. Instead of cycling defendants through repeated jail sentences for substance-abuse-related offenses, these courts combine judicial supervision with mandatory treatment. Research from the National Institute of Justice found that drug courts reduced repeat offending by 17 to 26 percent compared with traditional processing and saved an average of $6,744 per participant in criminal justice costs.5National Institute of Justice. Do Drug Courts Work? Findings From Drug Court Research Veterans courts follow a similar philosophy, connecting former service members with treatment for PTSD, traumatic brain injury, and substance abuse. Mental health courts divert defendants with serious psychiatric conditions into supervised treatment.
How State and Federal Courts Overlap
State and federal courts are separate systems, but they interact more than most people realize. Knowing where one ends and the other begins matters if you are sued or charged.
Concurrent Jurisdiction
Many types of cases can be filed in either state or federal court. Unless a federal statute makes federal jurisdiction exclusive, state courts can hear cases that involve federal law.6Constitution Annotated. ArtIII.S1.6.4 State Court Jurisdiction to Enforce Federal Law Civil rights claims under 42 U.S.C. ยง 1983, for example, can be brought in state court even though they arise under federal law. Bankruptcy is one of the exceptions where federal courts have exclusive authority.
Removal to Federal Court
If a plaintiff sues in state court and the defendant thinks the case belongs in federal court, the defendant can “remove” it. Removal is available when the case could have been filed in federal court originally, such as when it involves a federal question or when the parties are citizens of different states and the amount in controversy exceeds $75,000.7Office of the Law Revision Counsel. 28 USC 1332 – Diversity of Citizenship; Amount in Controversy; Costs The defendant must file the notice of removal within 30 days of being served with the complaint.8Office of the Law Revision Counsel. 28 USC 1446 – Procedure for Removal of Civil Actions Miss that window and the case stays put. A separate one-year cap applies to diversity-based removal. And a defendant who is a citizen of the state where the lawsuit was filed cannot remove on diversity grounds, since diversity jurisdiction exists to protect out-of-state defendants from local bias.9Office of the Law Revision Counsel. 28 USC 1441 – Removal of Civil Actions
State Law in Federal Court
When a case ends up in federal court based only on diversity of citizenship, the federal judge still has to apply state law. Under the Erie doctrine, established by the Supreme Court in 1938, federal courts hearing diversity cases apply the substantive law of the state where they sit.10Constitution Annotated. ArtIII.S2.C1.16.6 State Law in Diversity Cases and the Erie Doctrine A contract dispute between a Texan and a New Yorker heard in federal court in Texas is decided under Texas contract law. The federal court uses its own procedural rules but looks to the state for the legal standards that determine who wins.
How State Court Judges Are Chosen
Federal judges serve for life after presidential appointment and Senate confirmation. State court judges operate under very different rules, and the variation across states is wide.
Many states choose judges through popular elections, either partisan (candidates run with a party label) or nonpartisan. This gives voters direct control, but it also means candidates run campaigns and raise money, which raises its own concerns about impartiality. Other states use gubernatorial or legislative appointments, with the governor or legislature selecting judges without a public vote. These systems resemble the federal model but usually impose fixed terms rather than lifetime tenure.
A common compromise is merit selection, often called the Missouri Plan after the state that pioneered it. A nonpartisan commission screens applicants and sends a shortlist to the governor, who makes the appointment. After an initial term, the judge faces a retention election, a yes-or-no vote on continued service with no opponent on the ballot.
State court judges serve fixed terms rather than for life. Term lengths vary by court level, generally running longer the higher the court. About two-thirds of states also impose a mandatory retirement age on their judges, with 70 being the most common threshold.
Filing in and Interacting With State Courts
Most states now require attorneys to file court documents electronically, and many extend e-filing options to people representing themselves. E-filing lets documents be submitted at any hour and gives parties electronic access to case records.
Filing fees vary widely by case type and jurisdiction. A general civil lawsuit can cost a few hundred dollars just to file, with more fees for motions, subpoenas, and other filings along the way. Small claims courts charge substantially less. People who cannot afford the fees can usually request a waiver by showing financial hardship.
Jury service is another point of contact between ordinary citizens and the state court system. When summoned, jurors hear evidence and decide factual disputes in both civil and criminal cases. Daily compensation varies significantly, with some jurisdictions paying little more than a token amount. Employers in many states are barred from firing workers for responding to a jury summons, though not every state requires wages during service.