Oregon Circuit Courts by County: Jurisdiction and Location Guide

Oregon's circuit courts form the foundation of the state's trial court system, handling the vast majority of civil, criminal, family, and probate matters filed across all 36 counties. Each county has at least one circuit court, and the courts collectively operate under statewide jurisdiction rules established by the Oregon Legislature and administered by the Oregon Judicial Department. Understanding how these courts are organized geographically, what subject matter each handles, and where jurisdictional boundaries fall is essential for litigants, legal professionals, and researchers working within the Oregon court system.

Definition and Scope

Oregon's circuit courts are general-jurisdiction trial courts established under Article VII of the Oregon Constitution and governed primarily by Oregon Revised Statutes (ORS) Chapter 3. "General jurisdiction" means these courts have authority to hear virtually any civil or criminal case that arises under state law — unlike courts of limited jurisdiction that handle only specified case types.

The Oregon Judicial Department (OJD) administers 27 judicial districts across the state's 36 counties. Some districts consolidate two or more counties under a single judicial district — for example, Gilliam, Sherman, and Wheeler counties are grouped together — while the state's most populous counties, such as Multnomah, Washington, and Lane, each constitute their own district with multiple judges. Multnomah County Circuit Court alone houses more than 40 judges, reflecting the caseload concentration in the Portland metro area.

Scope and coverage limitations: This page addresses Oregon state circuit courts only. Federal district courts — including the U.S. District Court for the District of Oregon, which maintains courthouses in Portland, Eugene, Medford, and Pendleton — operate under a separate federal jurisdictional framework and are not covered here. Oregon tribal courts, which exercise sovereign jurisdiction over tribal members on tribal land, also fall outside the scope of state circuit court authority. The Oregon Supreme Court and Oregon Court of Appeals function as appellate bodies, not trial courts, and are similarly distinct from the circuit court system.

How It Works

Circuit courts are the entry point for virtually all contested legal matters under Oregon law. A case filed in a circuit court proceeds through a defined sequence of phases governed by the Oregon Rules of Civil Procedure or the Oregon Criminal Procedure statutes (ORS Chapter 135), depending on case type. For an overview of procedural frameworks, see Oregon Civil Procedure Basics and Oregon Criminal Procedure.

The structural workflow for a civil matter filed in circuit court follows these discrete phases:

  1. Filing — The plaintiff or petitioner files a complaint or petition with the clerk of the circuit court in the county where the cause of action arose or where a party resides, as specified under ORS 14.080 (venue rules).
  2. Service of Process — The defendant is formally served under ORCP 7.
  3. Responsive Pleading — The defendant has a defined period — typically 30 days for in-state defendants — to respond.
  4. Discovery — Parties exchange evidence and conduct depositions under ORCP 36–46.
  5. Pre-trial Motions — Parties may file dispositive motions (e.g., summary judgment under ORCP 47).
  6. Trial — Before a judge (bench trial) or jury. Oregon juries in civil cases consist of 6 or 12 members depending on case type, governed by ORS 17.095.
  7. Judgment and Appeal — Final judgments may be appealed to the Oregon Court of Appeals, which reviews circuit court decisions for legal error.

Each circuit court is led by a presiding judge elected by fellow judges of the district. Judges themselves are either elected in nonpartisan elections or appointed by the Governor to fill vacancies, as established under Article VII of the Oregon Constitution.

For information on court fees associated with filing, see Oregon Court Fees and Costs. The appeals pathway from circuit court decisions is detailed in Oregon Appeals Process.

Common Scenarios

Circuit courts handle the following primary case categories. Each category is governed by distinct statutory authority:

Civil litigation — Includes contract disputes, personal injury claims, property disputes, and business litigation. Claims under $10,000 may alternatively proceed in small claims court (Oregon Small Claims Court), which operates as a simplified division of the circuit court under ORS 46.405.

Criminal matters — All felony prosecutions and Class A misdemeanors are filed in circuit court. District attorneys, whose roles and authority are described in Oregon District Attorney System, represent the state in these proceedings. Defendants who cannot afford counsel have a constitutional right to appointed representation through the system described in Oregon Public Defender System.

Family law — Dissolution of marriage (divorce), legal separation, child custody, spousal support, and adoption proceedings are all circuit court matters. ORS Chapter 107 governs dissolution; ORS Chapter 109 governs parentage and adoption. See Oregon Family Law Courts for a dedicated breakdown.

Probate — The circuit court in the county where a decedent resided at death has exclusive jurisdiction over probate proceedings under ORS Chapter 111. See Oregon Probate Law Basics.

Juvenile — Circuit courts sitting as juvenile courts exercise jurisdiction over dependency, delinquency, and termination of parental rights cases under ORS Chapter 419B and 419C.

Landlord-tenant — Forcible entry and detainer (eviction) actions are filed in circuit court under ORS Chapter 105. See Oregon Landlord-Tenant Law.

Self-represented litigants navigating circuit court filings will find procedural reference material at Navigating Oregon Courts: Self-Represented.

Decision Boundaries

The primary jurisdictional distinctions that determine which court — or which circuit court — handles a given matter are:

Subject matter jurisdiction vs. venue: Subject matter jurisdiction (whether a circuit court can hear the case type at all) is set by statute and is generally broad. Venue — which county's circuit court should hear the case — is governed by ORS 14.080 and related statutes. Improper venue does not void a court's jurisdiction but may result in a change of venue motion.

Circuit court vs. Oregon Tax Court: The Oregon Tax Court — a separate court of statewide jurisdiction established under Article VII, Section 12 of the Oregon Constitution — handles all disputes involving Oregon tax laws. Tax disputes are explicitly removed from circuit court jurisdiction. See Oregon Tax Court for the distinction.

Circuit court vs. federal district court: Federal courts hold exclusive jurisdiction over bankruptcy, immigration, patent, and federal criminal matters. Cases that raise exclusively federal constitutional questions or involve parties from different states where the amount exceeds $75,000 (28 U.S.C. § 1332) may be removed to federal court. The regulatory context for Oregon's legal system addresses the federal-state jurisdictional interface in greater depth.

Circuit court vs. administrative agencies: Oregon agencies — such as the Bureau of Labor and Industries (BOLI) or the Oregon Employment Department — adjudicate certain disputes through administrative law processes before matters reach circuit court. Judicial review of final agency orders is typically filed in circuit court under ORS 183.484. See Oregon Administrative Law for the full framework.

Mandatory arbitration threshold: Oregon circuit courts require arbitration for civil cases where the amount in controversy does not exceed $50,000 (ORS 36.400), unless a party demands a trial de novo after an arbitration award. This threshold filters a significant portion of lower-value civil disputes into arbitration before any trial occurs. The broader landscape of non-trial resolution options appears at Oregon Alternative Dispute Resolution.

A comprehensive overview of how the circuit courts fit within the full state court hierarchy is available at the Oregon Legal Services Authority index, which maps the complete structure of Oregon's legal service sector.

References

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