How many jurors are on a grand jury?

• A. 12
• B. 18
• C. 24
• D. 16

Answer: (B)

Grand juries are larger panels than trial juries, and their exact size isn’t the same everywhere—it’s set by law and can vary by jurisdiction. In practice, many jurisdictions use a panel of eighteen jurors, with a quorum requirement that keeps the group large enough to protect against bias and to preserve secrecy in the indictment process. That flexibility is why eighteen is commonly encountered as the standard size in many places.

To see why the other numbers aren’t as fitting: twelve is typical for a trial jury, not a grand jury; twenty-four is less common as a fixed grand jury size in most statutes; sixteen is the minimum in some systems, but eighteen is more representative of common practice in many jurisdictions.