A civil trial in federal court seats between six and twelve jurors, with most trials today using eight. State courts set their own numbers, and roughly two-thirds still use twelve for civil cases while the rest use six or eight, sometimes varying by the size of the claim. How many jurors are in a civil trial depends on which court you’re in and, in federal court, on the individual judge.
Federal Civil Juries: Six to Twelve
Rule 48 of the Federal Rules of Civil Procedure sets the boundaries. A federal civil jury must begin with at least six members and no more than twelve.1Legal Information Institute. Federal Rules of Civil Procedure Rule 48 Within that range, the judge decides. There is no formula tied to case value or complexity; a judge might seat a larger panel for a trial expected to run long, building in a cushion in case jurors have to be excused, or seat a smaller one for a shorter case.
Twelve was the standard for centuries. That changed in 1973, when the Supreme Court held in Colgrove v. Battin that a six-person civil jury satisfies the Seventh Amendment’s guarantee of a jury trial.2Justia. Colgrove v. Battin, 413 U.S. 149 (1973) Federal courts have gravitated toward smaller panels ever since. Eight-person juries are the practical norm today. Full twelve-person panels appear in only a small fraction of federal civil cases, and even high-stakes, complex litigation often goes before a smaller jury.
Federal civil trials no longer designate alternate jurors. A 1991 amendment to Rule 47 abolished the alternate system.3Legal Information Institute. Federal Rules of Civil Procedure Rule 47 – Selecting Jurors Instead, the court seats more jurors than the minimum needed and lets all of them hear the evidence. If a juror has to be excused for illness, a family emergency, or misconduct, the court can dismiss that person for good cause under Rule 47(c) and let the trial continue with those who remain. Every juror who makes it to deliberations participates in the verdict.1Legal Information Institute. Federal Rules of Civil Procedure Rule 48 That is a big part of why judges seat eight rather than the bare minimum of six: it leaves room for attrition without dropping below a workable panel.
State Civil Juries: It Depends on the State
State courts aren’t bound by the Seventh Amendment; the Supreme Court has never extended that guarantee to state proceedings.4Justia. U.S. Constitution Annotated – Seventh Amendment – Courts in Which the Guarantee Applies Most state constitutions include their own civil jury right, but each state writes its own rules on how many people sit in the box.
Roughly two-thirds of states still use twelve-person juries as their civil default. The rest use smaller panels, most commonly six or eight. Some states split the difference by requiring twelve jurors for higher-value claims and allowing six or eight for smaller disputes. The same type of lawsuit can be heard by a jury of very different size depending on where it’s filed.
Many state courts still use designated alternates. These jurors are selected alongside the regular panel, sit through the trial, and step in only if a regular juror can’t continue. If no substitution is needed by the time deliberations begin, the alternates are typically dismissed.
One boundary worth flagging: small claims court usually doesn’t involve a jury at all. In many states, small claims cases are decided by a judge or magistrate with no jury option. If your dispute is headed to small claims, jury size isn’t a question you’ll have to answer.
Why the Number Matters
Jury size shapes what it takes to win. In federal court, the default is unanimity. Every juror who deliberates must agree on the verdict, unless both sides have stipulated in advance to accept a non-unanimous outcome.1Legal Information Institute. Federal Rules of Civil Procedure Rule 48 That stipulation is uncommon in practice, so federal civil verdicts almost always require full agreement, whether the panel is six people or twelve.
State courts are more flexible. A majority of states allow non-unanimous verdicts in civil cases, which is a sharp contrast with criminal trials, where unanimity is constitutionally required. The thresholds vary. A state using a twelve-person jury might accept a verdict from ten jurors, or even nine. A state with a six-person panel might accept five out of six. These supermajority rules are built to reduce the odds of a deadlock and keep cases from ending without a resolution.
The interaction between size and threshold is what actually determines how hard a verdict is to reach. A twelve-person unanimous jury is a much higher bar than a six-person unanimous jury, and both are higher bars than a nine-of-twelve state rule. When you hear that a case will be tried before a jury, the number is only half the picture; the agreement rule is the other half.
When the Jury Can’t Agree
Sometimes a jury deliberates and simply can’t reach the required level of agreement. When that happens, the judge declares a mistrial. The case isn’t decided either way. The plaintiff can retry it from scratch with a new jury. Retrials after a hung jury are permitted in civil cases, but they’re expensive and slow, so a deadlock often becomes the moment when the parties finally settle rather than start over.
Because federal court requires unanimity, hung juries are more likely there than in states that accept supermajority verdicts. That’s a design choice: federal rules put weight on the legitimacy of full agreement, while many state rules put weight on producing a definitive outcome.
Getting a Jury in the First Place
A civil jury isn’t automatic. You have to ask for one, and in federal court the deadline is short. Under Rule 38 of the Federal Rules of Civil Procedure, a party must serve a written jury demand on the other parties no later than 14 days after the last pleading directed to the issue is served.5Legal Information Institute. Federal Rules of Civil Procedure Rule 38 Miss that window and the right is waived. The case proceeds as a bench trial, with the judge deciding both the law and the facts.
The demand can go directly into a pleading or be filed as a separate document. You can demand a jury on all issues or specify which ones. Once made, the demand can’t be withdrawn without the other side’s consent.5Legal Information Institute. Federal Rules of Civil Procedure Rule 38 State courts have their own deadlines and procedures for jury demands, and many charge a fee. Cases quietly turn into bench trials all the time because someone missed the deadline, so if a jury matters to you, put the date on the calendar the moment the pleadings close.