Tax Map & GIS

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, see below for a checklist outlining the steps required to build and an application for a house number.

Please Note: You must have an approved access management 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 County Engineer’s office : 740-397-1590

On a State road? Contact the Ohio Department of Transportation 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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