John Mark Costine
- Verified against the Supreme Court of Ohio attorney directory, July 2026
47 years in practice
First admitted in 1979
First admitted in 1979
- 1979 Admitted, Ohio
Overview
John Mark Costine is an attorney admitted in Ohio (since 1979), based in St. Clairsville, OH.
This profile is built from public bar records and shows only what those records contain. John has not written or endorsed anything on this page.
Jurisdictions admitted
| Jurisdiction | Admitted | Bar number | Status |
|---|---|---|---|
| Ohio | 1979 | #2709 | Active |
Education
- Ohio Northern UniversityLaw school, per the bar record
Contact and offices
Ohio Supreme Court
St. Clairsville, OH
The address and number above come from the attorney's public bar registration, which can lag a recent move. Confirm before visiting.
Other attorneys in St. Clairsville
Ordered by years licensed, from the same public records.
Sources for this profile: the Supreme Court of Ohio attorney directory. License status can change; check the bar's own record for the current status before hiring. Updated July 12, 2026.