How Jury Duty Works & What to Expect

Jury

A jury is a sworn body of people (jurors) convened to hear evidence, make findings of fact, and render an impartial verdict officially submitted to them by a court, or to set a penalty or judgment. Most trial juries are "petit juries", and consist of up to 15 people. Primarily in the United States, a larger jury known as a grand jury is used to investigate potential crimes and render indictments against suspects, and consists of between 16 and 23 jurors.

Published May 8, 2026Updated May 9, 2026

Quick Answer

A jury is a group of citizens who listen to evidence in a trial and decide whether someone is guilty or not guilty. In the U.S., there are two types: petit juries for trials (6–12 people) and grand juries (16–23) that review crimes before charges are filed.

Key Takeaways

Never discuss the case outside the courtroom until deliberations begin
Take notes during testimony—they help you remember details later
Treat everyone with respect, including lawyers and witnesses
Deciding if someone is guilty in a criminal trial
Helping settle civil disputes like personal injury claims

Plain English Explanation

When you're on trial, a jury helps determine if the facts support guilt or innocence based on what they hear and see. If you’re called for jury duty, you’ll sit through testimony and legal arguments. Your job is to stay fair, follow instructions, and make a decision based only on the evidence presented—not outside information or opinions.

Step-by-Step Guides

How to prepare for jury duty

Beginner1 hour

What you'll need

Notebook
Pen
Reliable transportation

Step-by-step guide

1
Read your summons carefully and note the date, time, and location
2
Gather documents: ID, proof of address, and any schedule conflicts
3
Research the courthouse location and parking options
4
Prepare questions about dress code and what to bring (no phones)

Common Problems & Solutions

Why this happens

Lawyers may remove potential jurors for bias or discomfort, even if it seems personal or unrelated to the case.

How to fix it

1Stay calm and polite during voir dire (questioning phase)
2Avoid showing strong emotions about the case topic
3Be honest but concise in your answers
4Ask for clarification if a question feels leading

Mistakes to avoid

Refusing to answer questions directly
Making jokes or sarcastic remarks

When to seek help: If you believe dismissal was biased, consult a lawyer after the trial.

Pros & Cons

Pros

Citizens have a direct role in justice system decisions
Helps ensure fairness by removing bias from one judge
Provides community input into legal outcomes

Cons

Can be lengthy and disrupt daily routines
Lack of legal knowledge may lead to inconsistent rulings
Emotional cases can be stressful and overwhelming

Real-Life Applications

Deciding if someone is guilty in a criminal trial

Helping settle civil disputes like personal injury claims

Reviewing evidence in high-stakes fraud cases

Serving on a grand jury to decide whether to charge someone with a crime

Participating in a coroner’s inquest to determine cause of death

Beginner Tips

Never discuss the case outside the courtroom until deliberations begin
Take notes during testimony—they help you remember details later
Treat everyone with respect, including lawyers and witnesses
Follow the judge’s instructions exactly—even if you disagree
If you don’t understand something, ask the bailiff or judge quietly

Frequently Asked Questions

You may face fines or penalties. Contact the court immediately to explain your situation and request a reschedule.

Sources & References

[1]
Jury — Wikipedia
Wikipedia, 2026