Tax Map & GIS

The Knox County Tax Map Office is your first stop for real estate descriptions, land title research and maps or survey drawings. We are conveniently located with the County Auditor’s and Recorder’s Offices, on the first floor of the Knox County Service Center in Mount Vernon.

Documents can be emailed for review and pre-approval to [email protected].


Property Addresses

The Map Department assigns all house numbers in Knox County, including the City of Mount Vernon and all villages. If you are building a new home, Click here for a checklist outlining the steps required to build. Click here for a house number application.

Please note you must have an approved access management permit or driveway permit and the property must be in your name before a house number can be assigned.
For questions, be sure to contact the right office:

If your home is on a County road, contact the Engineers office : 740-397-1590

On a State road? Then contact the ODOT Highway Garage: 740-392-3066

For a home on a Township road, contact your township zoning inspector or township house.

Tax Map & GIS

117 East High Street, Suite 131
Mount Vernon, Ohio 43050
Phone: (740) 393-6752
Office Hours
Monday – Friday
8:00 AM – 4:00 PM
Closed weekends and holidays

Justin Smith

GIS Supervisor

Phone: (740) 393-6754

Kim McFadden

GIS Technician

Phone: (740) 393-6752


Thank you for completing the First Responders Residential History ADA Form

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