Union County, OH Property Records: Search Deeds, Owners, Tax Records, and Maps

Union County property records are maintained and issued by the offices of the Auditor, the Recorder, and the Treasurer. All three offices are in Marysville. Union County's property records are maintained and issued by the offices of the Auditor, the Recorder, and the Treasurer. All three offices are in Marysville. While Union County was officially organized in 1820, its property records date back to 1800, preserving filings from its parent counties (Delaware, Franklin, Logan, and Madison) for tracts that now fall within Union County boundaries.

Union County was organized in 1820 and named for being formed from parts of four existing counties (Delaware, Franklin, Logan, and Madison). Honda of America opened the Marysville Auto Plant in 1979, the first Honda automobile manufacturing facility in the United States.

The county's real-estate market is very competitive, with most listings closing in 20 to 40 days, significantly faster than the statewide average. Most of the inventory features modern single‑family homes built from 2000 to 2025 in Marysville, Plain City, and the region’s expanding new‑construction subdivisions.

Recent records highlight the underlying factors shaping the local real estate market. The area features a median home value of {median_home_value} and a median rent of {median_rent}. Additionally, the median household income stands at {median_household_income}, with a median real estate tax rate of {median_real_est_tax} expressed as a percentage of the property's assessed value.

How to Look Up Union County Property Records

Property owners and other interested persons can look up Union County property records through several online portals. You can look up recorded documents such as deeds, mortgages, and liens through the Recorder's property records portal. Searches can be completed by name, recorded date, or parcel information.

Similarly, you can search property ownership history, market value, and tax information using the authorized third-party property records portal on the County Auditor's website. This interface accepts address, owner name, or parcel ID. For more information on property tax, contact the County Treasurer's Office at (937) 645-3035.

Who Keeps Union County Property Records

Ohio property records are maintained by county offices. In Union County, the responsibility is shared by three separate offices:

• The County Auditor maintains property tax information, homestead and owner-occupancy filings, and serves as the county's chief fiscal officer under Ohio law.

• The County Recorder is the public registry for deeds, mortgages, liens, plats, easements, and similar instruments affecting real property in Union County.

• The County Treasurer prepares and mails the tax bills from the Auditor's duplicate, accepts payment through the year, and runs the tax-lien certificate sale for delinquent parcels.

How to Search Union County Property Records Online

When you research a property in Union County, plan to consult three separate portals, one for each office that holds part of the record. Run them in this order and you'll have a complete picture in minutes:

1. Begin with the Union County Auditor's real-estate search. You can search records by address, owner name, or parcel number. You will find a property's current owner, market value, taxable value (35% of market), sales history, and active homestead reductions.

2. You can look up tax bills and payment history on the Union County Treasurer portal. Property owners who fail to pay their taxes may lose their property through foreclosure by the County Treasurer.

3. Use the Union County Recorder's search system to view the chain of title. Most records searches are free. However, you may be required to subscribe for high-volume research.

4. Look at the chain of title from the most recent recorded deed. The grantor on a deed must match the grantee on the deed that came after. If the names do not correspond, then you've found a gap that needs research.

5. You may also use the GIS portal for mapping and boundary work. The map layers parcels, zoning, flood zones, and aerial imagery.

Auditor: Ownership, Values, and Parcel Data

The Union County Auditor is responsible for property valuation, ownership records, sales-history tracking, and homestead exemption administration.

Recorder: Deeds, Mortgages, and Liens

Union County Recorder is responsible for recording every document affecting title to real property. Deeds, mortgages, liens, plats, easements, and similar documents pass through this office and become part of the public chain of title.

Treasurer: Tax Bills and Payments

The Union County Treasurer's Office is responsible for the issuance of tax bills, payment processing, delinquency tracking, tax-lien certificate sales, and tax foreclosure for parcels that remain delinquent.

Property Tax in Union County: Rates, Exemptions, and Appeals

Union County's property is governed by Ohio's tax code. Property tax is 35% of a property's market value minus exemptions and reductions.

Reductions and exemptions

These are the main statutory reductions available to Union County property owners:

• Homestead Exemption. The county offers up to $26,200 of market value reduction for owner-occupants aged 65 or older. This reduction also applies to homeowners that are permanently and totally disabled.

• Owner-Occupancy Reduction. Homeowners may also get up to a 2.5% reduction off the calculated tax. You can apply once your property is identified as owner-occupied at the Auditor's Office.

• Disabled Veterans Homestead. The county also offers up to $50,000 of market value reduction for veterans with 100% service-connected disability.

• Current Agricultural Use Valuation (CAUV). Reduces taxable value on qualifying farmland to reflect agricultural use rather than market value. Available to working farms meeting the statutory acreage and gross-income tests.

Appealing a property valuation

Two appeal levels exist. The County Board of Revision takes initial appeals between January 1 and March 31. If the Board denies, escalate to the Ohio Board of Tax Appeals within 30 days. Successful appeals at either level reduce market value and lower the bill.

GIS Maps and Parcel Viewer

Parcel mapping in Union County runs through the county GIS portal. Beyond parcel boundaries, the GIS includes zoning, school districts, voting precincts, floodplains, and historical aerial imagery from multiple dates.

• County GIS portal. Union County's web GIS features layers for parcels, zoning, school districts, voting precincts, and floodplains over recent aerial imagery.

• Ohio statewide GIS. The Ohio Geographically Referenced Information Program (OGRIP) coordinates statewide datasets including LOCATION, the state's basemap and statewide imagery program.

Foreclosure and Tax-Lien Sales

Ohio separates mortgage foreclosure from tax-delinquency foreclosure. Mortgage cases go through the Union County Court of Common Pleas. Tax-foreclosure cases run through the Treasurer's office under the Ohio Revised Code at ORC 5721.

Tax-lien certificate sales

The Treasurer can sell tax-lien certificates on delinquent parcels under ORC 5721. Investors purchase the lien (not the property) and earn statutory interest. Owners retain the right to redeem by paying back taxes plus interest.

Right of redemption

Owners retain a redemption right until a final court decree of foreclosure. To redeem, pay the original taxes plus penalty (typically 10%), accrued interest, and any costs the lien-holder or Treasurer has incurred. The Treasurer's office calculates the redemption amount.

County land banks

Ohio's county land-bank statutes give the county a tool for handling deeply distressed delinquent properties. The land bank acquires title through tax foreclosure, clears encumbrances, and either rehabilitates the structure or sells the cleared land. Land banks are common in northeast Ohio counties.

Costs to Access Property Records

Property-records access in Union County is free for online searches. Paper copies and certified copies carry per-page fees set by the Recorder. New recordings follow Ohio's statutory fee schedule under ORC 317.32.

In Ohio, recording fees are fixed at $39 for the first two pages plus $8 per additional page. Documents that are not properly formatted carry additional surcharges. You can find the current recording fee schedule on the County Recorder's website.

The state's conveyance fee includes the state portion and the county portion. The state portion is $1.00 per $1,000 of consideration and the county portion runs up to $3.00 per $1,000. The state portion is mandatory, while the county portion is set by each county.

How to Record a Document

Most Union County homeowners never record a document directly. The title company handles recording at closing. But if you're filing a quitclaim, a mortgage release, or a personal lien, this is the path through the Recorder's office:

1. Start with formatting compliance. The document needs legible signatures, notary acknowledgment for each grantor, the prepared-by attribution, full legal description, and the property's parcel number to clear the Recorder's review.

2. Submit the deed to the Auditor for transfer review and conveyance fee assessment. Ohio's state portion is $1.00 per $1,000 of sale price; the permissive county portion is typically $3.00 per $1,000. Auditor stamp first, then Recorder.

3. File the DTE 100 (Real Property Conveyance Fee Statement) alongside the deed at the Auditor. Property transfers require this form, which documents the sale price, the parties, and any exemption claim. The Auditor uses DTE 100 data to compute the conveyance fee.

4. File at the Recorder’s Office once the Auditor has stamped the deed. The recording fee is approximately $39 for the first 2 pages plus $8 per additional page. Choose walk-in, mail-in (with return envelope), or e-recording through Simplifile or CSC.

The Recorder assigns a permanent document number at filing. Keep this number with the original, it's the fastest lookup key for any future certified copy request or title research.

FAQs

Quick Reference: Your Union County Property Records Checklist

The seven most frequent Union County property-records workflows are summarized here. Each row points you to the right office and the right portal.

Key Contacts and Official Portals