The Union County Ohio Auditor’s office maintains official property records, assessments, parcel data, tax information, and ownership details for Marysville, Plain City, Richwood, Milford Center, Unionville Center, and every township across Union County, Ohio.
This guide provides fast, reliable access to the tools you need: property search, parcel lookup, tax records, GIS maps, owner information — with direct official links and precise step-by-step instructions.
Official Union County Ohio Auditor Website
Direct verified link: https://unioncountyohio.gov/departments/auditor
Union County Ohio Auditor Property Search – Step-by-Step (Address Method)
Address Search – 10 Micro-Steps
Open the official property search portal
Click this direct link: Union County Property Search
Select Address Search tab
Click the “Address Search” or “Search by Address” tab (usually first or main option).
Enter house number
Type only the numbers (example: 456).
Add direction (N/S/E/W)
Example: N for North Main Street in Marysville.
Type street name only
Example: Main (no “St” or “Rd” needed).
Add unit number if needed
For apartments/condos only — skip otherwise.
Click “Search”
Wait 2–6 seconds.
Pick your property
Match address + owner if multiple results.
View full record
Shows owner, parcel, values, building info, taxes, history.
Use extra features
Click GIS map, print/save PDF, check sales history, set up alerts.
Parcel Number Lookup – Quick Tricks
- Check latest tax bill – parcel number usually top section
- Search address – parcel shows in bold at top
- Use Parcel ID field if visible
- Type number exactly (no dashes)
- Hit Search – record opens
- Tip: Copy it right away – needed for permits & appeals
Property Tax Records & Values
View My Tax Record & ValuesScroll to Tax/Valuation section for:
- Assessed value (land + building)
- Market value
- Exemptions applied
- Tax district & rate
- Payment history
- Pay or appeal links
GIS Parcel Map
Open Union County GIS Parcel ViewerProperty Owner Search
Search by Owner NameContact & Location
937-645-3003
Monday–Friday 8:00 AM – 4:30 PM
Union County Auditor Office
15 N Main St
Marysville, OH 43040
Frequently Asked Questions
How do I search property records in Union County Ohio?
Go to https://unioncountyohio.gov/property-search, select Address Search, enter house number + direction + street name, click Search, then select your property.
What is a parcel number in Union County?
A permanent 10- or 12-digit unique ID for each property. It appears at the top of every record and tax bill.
Can I check my property value online?
Yes — current assessed values are available in every property record.
How do I find the current owner?
Use Owner Search (last name first) and click the matching result.
How do I access GIS parcel maps?
Click GIS/MAP link on the auditor site, search address or zoom in, click any parcel.
What is the phone number for the Union County Auditor?
Call 937-645-3003. Hours: Monday–Friday 8:00 AM–4:30 PM.
Where is the Union County Auditor office?
15 N Main St, Marysville, OH 43040.
Can I search by address?
Yes — Address Search is fastest. Include direction (N/S/E/W).
How do I see tax payment history?
Open record and scroll to Tax Information section.
What info is in property records?
Owner, parcel number, assessed/market values, year built, sq ft, bedrooms/baths, sales history, exemptions, tax district, GIS link.
Khushboo Bobade is the editor and digital publisher of CountyAuditors.org. She oversees the research and editorial process for the website, ensuring that information about county auditor offices, property records, and government resources is accurate, verified, and easy for visitors to understand.
Property Tools & Calculators
Annual Tax Bill Estimator
Enter assessed value → see estimated yearly taxes.
Homestead Exemption Savings
Estimate how much you could save with homestead reduction.
Parcel Number Cleaner
Paste messy parcel → get clean format instantly.
Is Your Value High or Low?
Compare your assessed value to county average.
Appeal Deadline Countdown
Days left until next Board of Revision deadline (Ohio average).
~45 days
Approximate — check auditor site for exact date