Union County, Ohio

Property Search Tools

NOTICE:  Union County Auditor Andrea Weaver, AAS, has announced that property value estimates for the 2022 Triennial Update are now available for review.  For further details, please visit our Triennial Update Information web page.

ATTENTION: Title Companies, Title Examiners, Attorneys and Closing Agents. The Union County Auditor’s Office will be implementing new procedures for splits, condominiums, subdivisions, combinations, and plats created in 2021 and in future years. CLICK HERE for further details.

Please Click on one of the Links below to go to the desired web application. 

Union County GIS Map


Please direct map or GIS related questions to: maps@unioncountyohio.gov 

Parcel Search


Subdivision Plat Search    

Union County Web Portal    

Historical Map Collections