Atty. John L. Guinn

Atty. John L. Guinn

Mr. John L.

Hillsboro Hillsboro 37 yrs experience 37 year
Call (971) 509-8564 Book Appointment

Profile Summary

About John L. Guinn at a glance

John L. Guinn is a criminal defense, business, and litigation attorney based in Hillsboro, Oregon. They have 37+ years of legal experience, licensed to practice since 1989. Admitted to practice in Illinois (1989), Alabama (1993), Colorado (Inactive) (2000), and Oregon (2004). Educated at Wayne State University (J.D., 1989) and Colgate University (B.A. Geology, 1984). Serands clients in Hillsboro, OR and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. John L. Guinn is a lawyer practicing commercial litigation, criminal law
  • John L. received a B.A. degree from Colgate University in 1984, and has been licensed for 37 years
  • John L. practices in Hillsboro, OR

Practice Areas Explained

John L. Guinn's Areas of Practice

Each practice area below reflects the types of cases John L. Guinn handles, with a brief overview of what that area of law covers.

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

John L. Guinn is one of 214,271 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Oregon →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

John L. Guinn is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Oregon →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

John L. Guinn is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Oregon →

Jurisdictional Context

Why local counsel matters in Oregon

Practicing law in Oregon. Legal matters in Oregon are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Hillsboro are typically filed in the local municipal court or the appropriate Oregon state district court, depending on subject matter and amount in controversy. An attorney licensed in Oregon brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Oregon courts without local counsel or pro hac vice admission.

Looking for additional Oregon attorneys? Browse all attorneys in Hillsboro or all attorneys in Oregon.

Frequently Asked

Common questions about John L. Guinn

Where is John L. Guinn's law office located?
John L. Guinn's law practice is located in Hillsboro, Oregon. You can contact the office directly through this profile page.
What practice areas does John L. Guinn handle?
John L. Guinn focuses on criminal defense, business, litigation. Each practice area listed reflects experience handling cases of that type in Oregon.
How long has John L. Guinn practiced law?
John L. Guinn has 37+ years of legal experience and has been licensed since 1989.
Where did John L. Guinn go to law school?
John L. Guinn earned their education at (J.D., 1989); (B.A. Geology, 1984).
How can I contact John L. Guinn for a consultation?
You can contact John L. Guinn directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Wayne State University
- 1989
B.A. Geology
Colgate University
- 1984

Bar Admissions

Illinois
Admitted: 1989
Alabama
Admitted: 1993
Colorado (Inactive)
Admitted: 2000
Oregon
Admitted: 2004

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