Tired of calling the Union County Auditor’s office in Marysville and waiting on hold for 20+ minutes? Frustrated trying to find your parcel number on a faded tax statement, understand why your assessed value jumped this year, check if your taxes are paid up, or quickly see who owns that vacant lot next door in Richwood, Milford Center, Unionville Center, or any rural township across Union County, Ohio?
The official Union County Auditor website fixes all of these headaches in seconds. It gives every homeowner, buyer, realtor, builder, and neighbor free, 24/7 access to full property records, current parcel numbers, the latest assessed values, tax payment history, interactive GIS parcel maps, and accurate ownership information — right from your phone or laptop. This guide is packed with the most detailed micro-steps, real local tricks used by Union County residents, and practical insights that save time and avoid common mistakes.
Official Union County Ohio Auditor Website – Start Here
Direct verified link: https://unioncountyohioauditor.com/
Union County Ohio Auditor Property Search – Extremely Detailed Micro-Steps
Address Search – 10 Precise Micro-Steps (Fastest & Most Popular Method)
Open the Union County property search tool
Click or tap this direct link: https://unioncountyohioauditor.com/property-search (or main site → Property Search / Records)
Select the Address Search tab
Click the “Address Search” tab or button (usually the first or largest option).
Enter the house or building number
Type only the numbers (example: 456).
Add street direction prefix if applicable
Select or type N, S, E, W (example: N for North Main Street in Marysville or West Jefferson area).
Type the street name only
Example: Main or County Line (no “Road”, “Rd”, “St” needed unless prompted).
Add unit / apartment / suite number if applicable
Required for condos, duplexes or apartments; leave blank for single-family homes or farms.
Click the “Search” or “Submit” button
Wait 3–8 seconds — rural parcels sometimes take a second longer.
Select the correct property from the results list
Union County has many similar-sounding rural roads — double-check full address and owner name.
Review the full property record
You now see: current owner, parcel number, assessed value (land + building), market value estimate, year built, square footage, exemptions, tax district, and payment history.
Use extra tools & local tricks on the record page
Click GIS/map link for boundaries & aerials. Print or save PDF immediately. Check “Sales History” tab for recent comps — very useful if you plan to appeal or sell.
Union County Parcel Number Lookup – Real Local Tricks
Fastest & most reliable ways Union County residents find parcel numbers:
- Look at your current property tax bill (parcel number usually in top right box)
- Run an address search — parcel number appears in large bold text at the very top of the result page
- Use the dedicated Parcel ID search field (if visible) or copy from address result
- Enter the number exactly (no dashes, spaces, or extra zeros)
- Click Search — full record opens instantly
- Local trick: Many Union County farms have long legal descriptions — copy the 12-digit parcel number from the top instead of trying to search by owner name
- Pro tip: Screenshot or copy-paste the parcel number immediately — you’ll need it for building permits, septic approvals, or talking to zoning in London or Plain City
Union County Property Tax Records & Latest Assessed Values
View My Property Tax Record & Assessed Values NowOn the property record page scroll to Valuation / Tax section to see:
- Current Assessed Value (land value + building/improvement value)
- Market Value estimate used for taxation
- Any exemptions applied (homestead, CAUV for farmland, senior, veteran)
- Tax district code and current effective millage rate
- Full payment history table — shows dates paid, amounts, and any penalties
- Local insight: If your value increased significantly this cycle, check “Sales History” tab — Union County uses recent comparable sales heavily for residential revaluations
- Links to pay online through Treasurer or contact for informal review/Board of Revision appeal
Union County GIS Parcel Map – Practical Usage Tips
Open Union County GIS Parcel ViewerHow to use it effectively in Union County:
- Allow map to fully load (rural areas can take 5–15 seconds)
- Type your address in the top search box or zoom/pan to your area
- Click directly on any property boundary outline
- Read instant pop-up: owner name, parcel ID, acreage, assessed value
- Switch to aerial/satellite view to see recent photos — great for checking barn additions or new construction
- Local tip: Toggle CAUV layer if you have farmland — shows whether your property qualifies for lower agricultural valuation
- Use measure tool for lot lines or fence distances before building or disputing boundaries
Union County Property Owner Search
Search by Owner Name (Last Name First)Local trick: For LLCs or trusts common on farmland, search the business name exactly as it appears on tax bills.
Contact Information & Office Location
937-645-4080
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://unioncountyohioauditor.com/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 latest property value online?
Yes — current assessed values are available in every property record on the auditor website.
How do I find the current property owner?
Use Owner Search (last name first) on the property portal and click the matching result.
How do I access GIS parcel maps in Union County?
Click the GIS/MAP link on the auditor site, search address or zoom in, then click any parcel for details and aerial view.
What is the phone number for the Union County Auditor?
Call 937-645-4080. Hours: Monday–Friday 8:00 AM–4:30 PM.
Where is the Union County Auditor office located?
15 N Main St, Marysville, OH 43040.
Can I search property records by address in Union County?
Yes — Address Search is the fastest method. Include direction (N/S/E/W) when applicable.
How do I check property tax payment history?
Open your property record and scroll to Tax Information or Payment History section.
What information appears in Union County property records?
Owner name & mailing address, parcel number, current assessed/market values, year built, square footage, bedrooms/baths, sale history, exemptions, tax district, and GIS/map 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