Union County, Ohio

Where to Get Answers

The valuation placed on your property is determined by the Union County Auditor as required by law (ORC 5713.01).  The Auditor calculates tax rates based on public votes on tax levies and inside millage.  The Treasurer's Office only collects taxes and does not determine property values. 

Valuation Information County Auditor - 937-645-3003
Payment Information County Treasurer - 937-645-3035
Missing/Lost Tax Bills County Treasurer - 937-645-3035
Special Assessments County Auditor - 937-645-3003
Homestead Exemption County Auditor - 937-645-3003