Union County (OH) Auditor's Office

Official Union County Auditor’s Office

Social Media Policy -

[Union County (OH) Auditor's Office @UnionCo_Auditor]

The Union County Auditor's Office will be at the Union County Fair Monday through Friday from 4:00 PM to 7:00 PM, and we'd love to see you!

Whether you're coming for the rides, livestock, food, or entertainment, be sure to visit. We look forward to seeing you at the fair!

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Board of Revision Update
Our team is carefully reviewing every case as thoroughly as possible. Because of the upcoming counter-filing deadline, residents should expect to hear back from us in May. At that time, you’ll receive either an offer letter or a hearing date.

[Union County (OH) Auditor's Office @UnionCo_Auditor]

We are thrilled to announce that the Union County Auditor’s Office has received the Government Finance Officers Association (GFOA) Certificate of Achievement for Excellence in Financial Reporting for our Annual Comprehensive Financial Report for the fiscal year ended 12/31/2024

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Announcement from the Union County Auditor's Office:

We will be closed on Monday, February 16, 2026, in observance of Presidents' Day. Normal business hours will resume on Tuesday, February 17.

Wishing you all a safe and enjoyable holiday honoring our nation's leaders!

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Just a friendly reminder that the Union County Auditor's Office will be closed on Monday, January 19th, 2026 in observance of Martin Luther King Jr. Day.

We will resume normal business hours on Tuesday, January 20th, 2026.

We wish everyone a meaningful and peaceful holiday!

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Today we’re celebrating the incredible power of Geographic Information Systems (GIS) – the technology that helps us map properties.

Curious about your own property? Search your address or parcel number on our interactive GIS map here: https://t.co/LCMRzo0wbY

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Wondering how TIF districts impact school funding in Union County? Facts: TIFs ≠ abatements, owners pay FULL property taxes; the "increment" from growth funds improvements like roads. Renters contribute via rent! No abated apartments here, everyone chips in. The more you know!

[Union County (OH) Auditor's Office @UnionCo_Auditor]

The County Auditors Association of Ohio (CAAO) held a property tax relief briefing in Knox County. This event brought together auditors and community members to discuss solutions to address high property taxes and provide relief for Ohio homeowners.
https://t.co/vWwiylTPfo

[Union County (OH) Auditor's Office @UnionCo_Auditor]

This morning, your Union County Auditor, Andrea Weaver delivered a compelling presentation at Boston's Grill in Marysville, addressing the hot topic of property taxes in Ohio during the Union County Republican Party’s monthly meeting.

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Union County Property Owners: 2025 Tentative Property Values Are Now Live!

Check your property value, explore commonly asked questions, and schedule an informal hearing at: https://t.co/K86sItCZcL

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Union County Auditor's Office is at the Union County Fair all week! Committed to community engagement, stop by 4-7 PM daily to say hello, join our scavenger hunt and spin the prize wheel! #UnionCountyFair

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Union County Auditor Andrea Weaver and the County Auditors Association of Ohio, invites you to a press conference addressing Ohio’s property tax crisis.

Friday, July 25, 2025, at 10:00 AM
940 London Ave, Marysville, OH 43040

Media and community members are encouraged to attend

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Dog tags are key to reuniting lost pets with their owners quickly! Register your dog with Union County and keep tags current to ensure a swift, safe return home if they wander. Contact Union County Auditor’s Office at 937-645-3003 or visit our website for more details.

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Union Co Auditor sets property values for reappraisals using 3 yrs of arm’s-length sales, focusing on last 12 months. Per ORC 5713.03, we assess true value, adjusting for damages or improvements. Values are submitted to Oh Dept. of Taxation. Report due soon, approval expected.

[Union County (OH) Auditor's Office @UnionCo_Auditor]

The Union County Auditor's Office will be CLOSED tomorrow, June 19, 2025, in observance of Juneteenth, a federal holiday commemorating the end of slavery in the US. We honor this day of freedom and reflection.

We will reopen on Friday, June 20, 2025.

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Visit our Facebook page to see our recent Union County Auditor's update!

Link - https://t.co/d0cjc2a2yX

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Huge congratulations to our very own Lauren Goodrich and Tyler Marsh for completing the weeklong Cyber Python Bootcamp at Marion Technical College! 🥳

Their willingness to expand their knowledge in cybersecurity and coding is truly commendable. We’re so proud of their dedication

[Union County (OH) Auditor's Office @UnionCo_Auditor]

This Saturday (6/14) from 2-4pm head to Pastime Park and Campground for agriculture activities, butter making, photo ops, goodie bags, and FREE ice cream for the first 300 guests! Meet local farmers and celebrate Ohio agriculture.
For more information: https://t.co/CKpVNPIDU6

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Union County is booming! Whether you’re a longtime resident or new to our thriving county, get out this summer and explore the incredible events Union County has to offer—fairs, markets, music, and more!

Discover the full lineup of summer fun at https://t.co/HDFCPdWoRp

[Union County (OH) Auditor's Office @UnionCo_Auditor]

Your Union County Auditor Andrea Weaver had a great Elected Officials & Department Heads meeting today that also featured a fantastic presentation on ticks in Ohio by experts from the Franklin County's OSU extension office! We wanted to pass along some vital information.