---
title: "Thomas M. O'Diam | KnowJudges"
canonical: "https://knowjudges.com/kyj/judge/thomas-m-o-diam"
page_type: "judge_profile"
updated: "2026-07-27"
---

# Thomas M. O'Diam

Greene Co. Probate Court · Judge

## Profile

- Court: Greene Co. Probate Court
- State: Ohio
- Role: Judge
- Service status: active
- Last verified: 2026-07-27

## Summary

Official statewide and applicable court procedural guidance applies to this judge.

## Before you appear

- Read the judge-specific standing order first when one is listed.
- Check the docket and case orders for requirements that supersede broader guidance.
- Confirm current remote-access and courtroom technology arrangements before the proceeding.

## Courtroom Rules

### remote hearing exhibits

Scope: statewide

Ohio's statewide virtual-court guidance tells courts to include instructions for submitting exhibits or notifying the court of witnesses when remote-hearing information is sent to participants.

Evidence excerpt: Instructions for submitting exhibits or notifying the court of witnesses.

[Virtual Public Access to Ohio Court Proceedings](https://www.supremecourt.ohio.gov/courts/virtual-court/)
Source checked: 2026-07-26

### remote hearing ground rules

Scope: statewide

Ohio's statewide virtual-court guidance recommends advance ground rules for documents, exhibits, screen sharing, and pre-marking exhibits for remote hearings.

Evidence excerpt: Documents: Share any documents/exhibits that will be reviewed in advance. Use the share screen function while documents are being discussed during the hearing. Request that the documents are pre-marked for exhibit purposes.

[Virtual Public Access to Ohio Court Proceedings](https://www.supremecourt.ohio.gov/courts/virtual-court/)
Source checked: 2026-07-26

### remote recording

Scope: statewide

Ohio's statewide virtual-court guidance states that litigants, attorneys, and the public should be instructed not to record the hearing.

Evidence excerpt: The court should instruct the litigants, attorneys, and the public to not record the hearing.

[Virtual Public Access to Ohio Court Proceedings](https://www.supremecourt.ohio.gov/courts/virtual-court/)
Source checked: 2026-07-26


## Sources

- [Official profile](https://www.ohiojudges.org/directory/ojc-directory/)
- [Official roster](https://www.ohiojudges.org/directory/ojc-directory/)
- [Ohio Judicial Conference Directory official judicial roster](https://www.ohiojudges.org/directory/ojc-directory/)
- [Virtual Public Access to Ohio Court Proceedings](https://www.supremecourt.ohio.gov/courts/virtual-court/)

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## Biography

### Professional career

- Thomas M. O’Diam is a retired judge of the Greene County Probate Court in Xenia, Ohio, serving from 2013 until his planned retirement on February 8, 2027

### Education

### Additional information

- Has served nearly 12 years in the role and announced in February 2025 that he will not seek re‐election in 2026, citing a desire for a more flexible schedule, family priorities, and creative use of his experience
- He was re‐elected in 2014 for a term ending February 8, 2021.
- O’Diam was appointed by Ohio Governor John Kasich on July 16, 2013 to fill a vacancy created by the retirement of Robert A. Hagler, and assumed the bench on August 5, 2013.