Atty. John Harrington MacConaghy

Atty. John Harrington MacConaghy

John Harrington MacConaghy is a lawyer practicing business law. John Harrington received a B.A. degree from University of California at Berkeley in 1974, and has been licensed for 48 years.

Sonoma Sonoma 48 yrs experience 48 year
Call (628) 303-1085 Book Appointment

Profile Summary

About John Harrington MacConaghy at a glance

John Harrington MacConaghy is an Attorney based in Sonoma, California, practicing at MacConaghy & Barnier. They have 48+ years of legal experience, licensed to practice since 1978. Their practice focuses on business. Admitted to practice in California (1978) and Washington (1984). Educated at Hastings College of Law, University of California (J.D., 1978) and University of California at Berkeley (B.A., 1974). Recognitions include AV Preeminent. Active member of Director, 1997-2000, Bay Area Bankruptcy Forum. Serands clients in Sonoma, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Harrington MacConaghy is a lawyer practicing business law
  • John Harrington received a B.A. degree from University of California at Berkeley in 1974, and has been licensed for 48 years
  • John Harrington practices at MacConaghy & Barnier in Sonoma, CA

Practice Areas Explained

John Harrington MacConaghy's Areas of Practice

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

Business & Corporate Law

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

John Harrington MacConaghy is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Jurisdictional Context

Why local counsel matters in California

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Sonoma are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California 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 California courts without local counsel or pro hac vice admission.

Looking for additional California attorneys? Browse all attorneys in Sonoma or all attorneys in California.

Frequently Asked

Common questions about John Harrington MacConaghy

Where is John Harrington MacConaghy's law office located?
John Harrington MacConaghy's law practice is located in Sonoma, California. The firm is MacConaghy & Barnier. You can contact the office directly through this profile page.
What practice areas does John Harrington MacConaghy handle?
John Harrington MacConaghy focuses on business. Each practice area listed reflects experience handling cases of that type in California.
How long has John Harrington MacConaghy practiced law?
John Harrington MacConaghy has 48+ years of legal experience and has been licensed since 1978.
Where did John Harrington MacConaghy go to law school?
John Harrington MacConaghy earned their education at (J.D., 1978); (B.A., 1974).
How can I contact John Harrington MacConaghy for a consultation?
You can contact John Harrington MacConaghy 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.
What awards or recognition has John Harrington MacConaghy received?
John Harrington MacConaghy's notable recognition includes: AV Preeminent.

Practice Areas

Education

J.D.
Hastings College of Law, University of California
- 1978
B.A.
University of California at Berkeley
- 1974

Awards

AV Preeminent

Bar Admissions

California
Admitted: 1978
Washington
Admitted: 1984

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