Union County Jail Roster Search
The Union County jail roster lists inmates held at the Tri-County Regional Jail in Mechanicsburg, Ohio. Union County shares this regional facility with Champaign and Madison counties. The jail roster gets updated as new bookings happen and people get released. If you need to find someone held on charges from Union County, you can search through the sheriff's office or contact the regional jail directly. The Tri-County Regional Jail sits on State Route 236 and handles all arrests from Union County. Searching the roster is straightforward once you know the right resources to use.
Union County Overview
Union County Jail Roster Details
The Union County Sheriff's Office is at 121 E. 6th Street in Marysville, OH 43040. You can call the sheriff at 937-645-4110. Unlike many Ohio counties that run their own jails, Union County uses the Tri-County Regional Jail. This shared facility sits at 8480 State Route 236 in Mechanicsburg, OH 43044. Champaign and Madison counties also send their inmates there. The regional jail phone number is 937-834-5000.
You can check the Union County jail roster through the Union County Sheriff's Office website. The regional jail may also provide roster data on its own site or by phone. Under ORC §149.43, jail records are public in Ohio. That means you have the right to request and view them. The sheriff's office can point you to the right place for roster information whether that is online or through a records request.
The sheriff handles transport between the regional jail and Union County courts for hearings and trials.
| Facility | Tri-County Regional Jail |
|---|---|
| Address | 8480 State Route 236 Mechanicsburg, OH 43044 |
| Jail Phone | 937-834-5000 |
| Sheriff Phone | 937-645-4110 |
| Sheriff Office | 121 E. 6th Street Marysville, OH 43040 |
| Website | unioncountyohio.gov/sheriff |
Search Union County Roster Online
The Union County Sheriff's Office provides access to jail roster data through their website. Below is the Union County Sheriff's Office page where you can start a search for inmates.
The site covers inmates from Union County held at the regional facility. You can search by name to find booking info and charges. Since the Tri-County Regional Jail serves three counties, you may see inmates from Champaign and Madison counties in the same system.
The Union County government portal also has links to county services and departments. Here is the Union County government page for more general county information.
From the main county page, you can navigate to the sheriff's department and other offices that handle records.
State Search Tools for Union County
State databases add more options for finding people. The ODRC Offender Search tracks state prison inmates. If someone from Union County went to state prison, you can find them there. The Ohio.gov offender search portal helps direct you to the right tool. Keep in mind state databases cover prison inmates, not county or regional jail bookings.
The VINE system sends alerts when an inmate's status changes. Under ORC §2930.16, crime victims can sign up for these notifications. It covers releases, transfers, and escapes. Registration is free and works for inmates at both county and state levels across Ohio.
Note: The Tri-County Regional Jail roster covers inmates from three counties, not just Union County.
Jail Records and Ohio Public Records Law
Ohio's public records law is one of the broadest in the country. ORC §149.43 makes government records available to everyone. You don't have to say why you want them. Jail rosters fall under this law. The Union County Sheriff or the Tri-County Regional Jail must respond to records requests within a reasonable time. If they deny your request, the Attorney General's Sunshine Laws page explains how to file a complaint.
For inmates in state prison, ORC §5120.66 governs record access. The Bureau of Prisons inmate locator covers federal inmates. If you need a lawyer for a records dispute or criminal case in Union County, the Ohio State Bar Association offers a referral service.
Nearby Counties
These counties are near Union County. Each has its own jail or participates in a regional facility.
Cities in Union County
Marysville is the county seat and largest city in Union County. All arrests in the county go through the Tri-County Regional Jail in Mechanicsburg. Other communities include Richwood and Plain City. No matter where in the county an arrest happens, the booking goes to the same regional facility. The sheriff handles transport from all parts of Union County to the jail for processing and court dates.