Union County, OhioProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- January 2026 for first-half bills and approximately mid-July 2026 for second-half bills; official county pages do not publish exact mailing days.
- Payment deadline
- 2025 real-estate taxes payable in 2026: first half due February 18, 2026; second half due August 12, 2026. The county also states mobile homes are due August 31, 2026.
- Assessment appeal
- January 1–March 31, 2026 for 2025 valuation complaints under Ohio Revised Code §5715.19; the county directs taxpayers to Auditor Board of Revision materials.
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
December 31, 2026 for the 2026 real-property application under Ohio DTE 105A instructions.
Senior relief
Ohio Homestead Exemption: qualifying homeowners age 65+, permanently and totally disabled homeowners, eligible surviving spouses, and qualifying 100% service-connected disabled veterans may apply. The home must be owned and occupied as the principal residence on January 1. New senior/disabled applicants generally must have 2025 Ohio modified adjusted gross income of $41,000 or less for the 2026 application period; the standard homestead reduction shields up to $29,000 of market value and enhanced disabled-veteran relief has separate requirements.
Valuation limits
No general countywide parcel-value cap was published. Ohio assesses real property at 35% of market value, reappraises every six years with triennial updates, and applies HB 920 reduction factors and the 10-mill limitation. House Bill 186, effective March 20, 2026, creates an Inflation Cap Credit for qualifying school-district/JVS levy growth; it is a tax credit/collection limitation, not a general cap on appraised or taxable parcel value.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →