Jury duty is a civic responsibility in which ordinary citizens help decide legal cases. It matters because juries bring community judgment into the courtroom and help protect the right to a fair trial. In the United States, the right to a jury is connected to constitutional protections in both criminal and civil cases.
Serving on a jury is one way citizens take part directly in the justice system.
Jurors are usually selected from public records such as voter registration, driver license lists, or state identification records. A group of people is summoned, then the court uses questions and screening to choose jurors who can be fair and impartial. Trial juries listen to evidence and decide facts in a case, while grand juries decide whether there is enough evidence to bring criminal charges.
The process depends on honesty, attention, and respect for the rule of law.
Key Facts
- Jury duty is a legal obligation for eligible citizens who are summoned by a court.
- Available jurors = summoned jurors - excused jurors - deferred jurors.
- A trial jury decides whether the facts support a verdict in a criminal or civil trial.
- A grand jury decides whether there is probable cause to charge someone with a crime.
- In many serious criminal trials, verdicts must be unanimous, meaning all jurors agree.
- Jurors must decide cases only from evidence presented in court and the judge's instructions.
Vocabulary
- Jury duty
- Jury duty is the responsibility of eligible citizens to appear for possible service as jurors in court.
- Summons
- A summons is an official notice requiring a person to report to court for possible jury service.
- Voir dire
- Voir dire is the questioning process used by the judge and lawyers to determine whether potential jurors can be fair.
- Trial jury
- A trial jury is a group of jurors that hears evidence during a trial and decides the facts of the case.
- Grand jury
- A grand jury is a group of citizens that reviews evidence to decide whether criminal charges should be brought.
Common Mistakes to Avoid
- Ignoring a jury summons is wrong because it is an official court order and can lead to penalties or rescheduling requirements.
- Assuming jurors decide the law is wrong because the judge explains the law and jurors decide the facts based on evidence.
- Researching the case online is wrong because jurors must use only the evidence presented in court to keep the trial fair.
- Thinking grand juries and trial juries do the same job is wrong because grand juries consider charges before trial while trial juries decide verdicts after evidence is presented.
Practice Questions
- 1 A court summons 180 people for jury duty. 35 are excused and 25 receive deferrals. How many available jurors remain?
- 2 A trial needs 12 jurors and 2 alternates. If 56 available jurors report to court, how many people will not be seated on that jury after the 14 seats are filled?
- 3 Explain why it is important for jurors to avoid outside information about a case, even if they think the information might help them understand the trial.