Atty. John Mark Costine

Atty. John Mark Costine

John Mark Costine is a lawyer practicing juvenile law, criminal, estate planning and 8 other areas of law. John received a B.A. degree from Wake Forest University in 1976, and has been licensed for 47 years.

St. Clairsville St. Clairsville 47 yrs experience 47 year
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Profile Summary

About John Mark Costine at a glance

John Mark Costine is a Com. Pleas J. based in St. Clairsville, Ohio. They have 47+ years of legal experience, licensed to practice since 1979. Their practice focuses on trusts, probate, personal injury, criminal defense, and family law. Admitted to practice in Ohio (1979). Educated at Ohio Northern University (J.D., 1979) and Wake Forest University (B.A., 1976). Recognitions include BV Distinguished. Serands clients in St. Clairsville, OH and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Mark Costine is a lawyer practicing juvenile law, criminal, estate planning and 8 other areas of law
  • John received a B.A. degree from Wake Forest University in 1976, and has been licensed for 47 years
  • John practices in St. Clairsville, OH

Practice Areas Explained

John Mark Costine's Areas of Practice

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

Trusts

John Mark Costine is one of 104,171 trusts attorneys indexed nationally. Browse trusts attorneys in Ohio →

Probate

John Mark Costine is one of 128,014 probate attorneys indexed nationally. Browse probate attorneys in Ohio →

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

John Mark Costine is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in Ohio →

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 Mark Costine is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Ohio →

Family Law

Family law attorneys handle divorce, child custody, child support, adoption, prenups, and protective orders. Find verified family lawyers near you.

John Mark Costine is one of 187,066 family law attorneys indexed nationally. Browse family law attorneys in Ohio →

Jurisdictional Context

Why local counsel matters in Ohio

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

Looking for additional Ohio attorneys? Browse all attorneys in St. Clairsville or all attorneys in Ohio.

Frequently Asked

Common questions about John Mark Costine

Where is John Mark Costine's law office located?
John Mark Costine's law practice is located in St. Clairsville, Ohio. You can contact the office directly through this profile page.
What practice areas does John Mark Costine handle?
John Mark Costine focuses on trusts, probate, personal injury, criminal defense, family law. Each practice area listed reflects experience handling cases of that type in Ohio.
How long has John Mark Costine practiced law?
John Mark Costine has 47+ years of legal experience and has been licensed since 1979.
Where did John Mark Costine go to law school?
John Mark Costine earned their education at (J.D., 1979); (B.A., 1976).
How can I contact John Mark Costine for a consultation?
You can contact John Mark Costine 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 Mark Costine received?
John Mark Costine's notable recognition includes: BV Distinguished.

Education

J.D.
Ohio Northern University
- 1979
B.A.
Wake Forest University
- 1976

Awards

BV Distinguished

Bar Admissions

Ohio
Admitted: 1979

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