Atty. David Jon O'Leary

Atty. David Jon O'Leary

Atty. David Jon O'Leary is a lawyer practicing criminal law, criminal defense, general practice.

Janesville Janesville 38 yrs experience 38 year
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Profile Summary

About David Jon O'Leary at a glance

David Jon O'Leary is a The Rock Co. Dist. Atty. Off. based in Janesville, Wisconsin. They have 38+ years of legal experience, licensed to practice since 1988. Their practice focuses on criminal defense. Admitted to practice in Wisconsin (1988). Educated at Marquette University (J.D., 1988) and Marquette University (B.S., 1985). Recognitions include BV Distinguished. Serands clients in Janesville, WI and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Atty. David Jon O'Leary is a lawyer practicing criminal law, criminal defense, general practice
  • David received a B.S. degree from Marquette University in 1985, and has been licensed for 38 years
  • David practices in Janesville, WI

Practice Areas Explained

David Jon O'Leary's Areas of Practice

Each practice area below reflects the types of cases David Jon O'Leary 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.

David Jon O'Leary is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Wisconsin →

Jurisdictional Context

Why local counsel matters in Wisconsin

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

Looking for additional Wisconsin attorneys? Browse all attorneys in Janesville or all attorneys in Wisconsin.

Frequently Asked

Common questions about David Jon O'Leary

Where is David Jon O'Leary's law office located?
David Jon O'Leary's law practice is located in Janesville, Wisconsin. You can contact the office directly through this profile page.
What practice areas does David Jon O'Leary handle?
David Jon O'Leary focuses on criminal defense. Each practice area listed reflects experience handling cases of that type in Wisconsin.
How long has David Jon O'Leary practiced law?
David Jon O'Leary has 38+ years of legal experience and has been licensed since 1988.
Where did David Jon O'Leary go to law school?
David Jon O'Leary earned their education at (J.D., 1988); (B.S., 1985).
How can I contact David Jon O'Leary for a consultation?
You can contact David Jon O'Leary 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 David Jon O'Leary received?
David Jon O'Leary's notable recognition includes: BV Distinguished.

Education

J.D.
Marquette University
- 1988
B.S.
Marquette University
- 1985

Awards

BV Distinguished

Bar Admissions

Wisconsin
Admitted: 1988

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