Oregon Jury System: Selection, Duties, and Grand Jury Process

Oregon's jury system operates as a constitutionally mandated mechanism for resolving disputes and evaluating criminal charges through citizen participation. The system divides into two distinct structures — the petit jury and the grand jury — each serving separate functions under Oregon law. Governed by Oregon Revised Statutes (ORS) Chapter 10 and constitutional provisions in both the Oregon Constitution, Article I, Sections 11 and 16 and the U.S. Constitution's Sixth and Seventh Amendments, the Oregon jury process defines how citizens are summoned, qualified, selected, and discharged. For a broader orientation to the legal framework in which juries operate, see the Oregon Legal Services Authority.

Definition and scope

Oregon's jury system encompasses two formally distinct institutions:

Petit Jury (Trial Jury): A body of citizens empaneled to hear evidence and render a verdict in civil or criminal trials. Oregon circuit courts use petit juries for criminal felony and misdemeanor trials, and for civil cases in which a party exercises the right to jury trial under Oregon Rule of Civil Procedure (ORCP) 51.

Grand Jury: A body of 7 citizens convened under ORS 132.010 to review prosecutorial evidence and determine whether probable cause exists to indict a defendant on a felony charge. Grand jury proceedings are not adversarial trials; they are investigative in nature.

Oregon's jury system applies exclusively to proceedings before Oregon state courts, including the 36 circuit courts organized by county and the Oregon Court of Appeals and Oregon Supreme Court in limited procedural contexts. Federal jury requirements — governed by the Federal Rules of Criminal Procedure and administered through the U.S. District Court for the District of Oregon — fall outside this page's scope. Tribal court proceedings under Oregon tribal law and courts are similarly not covered here. Oregon's jury statutes do not apply to small claims proceedings (Oregon Small Claims Court) or Oregon Tax Court proceedings.

How it works

Juror qualification and summoning

The Oregon Judicial Department draws prospective jurors from a combined source list that incorporates Oregon DMV records and voter registration rolls, as authorized under ORS 10.030. To qualify, a prospective juror must:

1. Be a U.S. citizen
2. Be at least 18 years of age
3. Be a resident of the county in which the court is located
4. Be sufficiently proficient in English to understand proceedings
5. Not be subject to a felony conviction with an uncompleted sentence

Individuals with certain disqualifying conditions — including active duty military service, prior service as a juror within the preceding 24 months in the same county, or a demonstrated inability to be impartial — may be excused under ORS 10.050.

Voir dire and empanelment

Once a jury pool (venire) is assembled, the selection process known as voir dire allows attorneys and, in some courts, the presiding judge to question prospective jurors. Under ORS 10.040, challenges to prospective jurors are classified as:

• Challenges for cause: Unlimited in number; require a demonstrated reason such as bias or conflict of interest
• Peremptory challenges: Limited in number by statute; Oregon allows each side 3 peremptory challenges in criminal misdemeanor cases and up to 12 in capital cases, varying by case type under ORS 136.210

Petit jury deliberation and verdict

Oregon distinguishes itself from federal jury practice through its non-unanimity rule for non-capital criminal cases. Under ORS 136.450, a 10-2 supermajority vote was historically sufficient for conviction. However, following the U.S. Supreme Court's 2020 decision in Ramos v. Louisiana (590 U.S. 83), unanimous verdicts are now constitutionally required in felony criminal cases. Civil jury verdicts in Oregon may still be rendered by a 5/6 majority of jurors under Oregon Constitution Article VII (Amended), Section 5.

Grand jury process

Oregon grand juries consist of 7 members drawn from the same jury pool as petit jurors. The district attorney presents evidence in a closed session — defense counsel is not present, and the defendant has no right to testify unless subpoenaed. A concurrence of at least 5 of the 7 grand jurors is required to return an indictment under ORS 132.420. If the grand jury does not return an indictment, it returns a "no bill," and charges may be dismissed unless the prosecution seeks a new grand jury. For context on how criminal procedure interacts with grand jury decisions, see Oregon Criminal Procedure.

Common scenarios

Felony criminal prosecution: After an arrest, the Oregon district attorney system presents the case to a grand jury. If an indictment issues, the defendant proceeds to arraignment and, if no plea is entered, to trial before a 12-person petit jury.

Civil damages dispute: A plaintiff in a tort or contract case may demand jury trial. Under ORCP 51A, this demand must be filed within 14 days of the last pleading directed to the issue. A 6-person jury is standard in circuit court civil cases, with verdict by 5/6 majority.

Juror hardship claims: Jurors facing documented financial hardship — such as self-employment with no paid leave — may petition for excusal or deferral. Oregon law does not require employers to pay wages during jury service, though ORS 10.090 prohibits employers from penalizing or dismissing an employee for responding to a jury summons.

Grand jury secrecy: Grand jury proceedings are closed to the public under ORS 132.060. Grand jurors, witnesses, and court reporters are bound by statutory secrecy obligations. Prosecutors may not publicly disclose the substance of testimony presented in grand jury sessions.

Alternative dispute resolution diversion: Parties in civil cases may resolve disputes before jury selection through mediation or arbitration. The Oregon alternative dispute resolution framework allows circuit courts to refer cases to mandatory arbitration where the amount in controversy does not exceed $50,000, potentially bypassing jury trial entirely.

Decision boundaries

Oregon's jury system operates within defined constitutional and statutory limits that determine when jury trial rights attach, when grand jury review is mandatory, and what verdicts are legally valid.

Right to jury trial does not attach in the following Oregon contexts:

• Bench trials in cases where both parties waive jury under ORCP 51B
• Oregon Tax Court proceedings
• Small claims proceedings (ORS Chapter 46)
• Contempt proceedings (civil)
• Juvenile delinquency adjudications under ORS Chapter 419C

Grand jury is not required for misdemeanor charges. District attorneys may proceed by information — a formal charging document — rather than indictment for offenses classified below felony level under Oregon law.

The regulatory context for Oregon's legal system provides additional grounding on how constitutional provisions, ORS chapters, and court rules interact across Oregon's judiciary. Oregon's jury statutes are enforced and interpreted through the Oregon Judicial Department; rule-making authority over civil procedure lies with the Council on Court Procedures, which promulgates the Oregon Rules of Civil Procedure under ORS 1.735.

Jury fee compensation in Oregon is set at $10 per day for the first 10 days of service and $25 per day thereafter under ORS 10.061, rates that have remained a point of legislative discussion given that they fall below federal minimum wage for full-day service.

References

• Oregon Revised Statutes, Chapter 10 — Juries
• Oregon Revised Statutes, Chapter 132 — Grand Juries
• Oregon Revised Statutes, ORS 136.210 and 136.450 — Criminal Jury Provisions
• [Oregon Constitution,