Town Hall Address 40 Public Sq. Mount Vernon, OH 43050-3241 United States- Knox County Website http://mountvernonohio.org/ Zoning 740-393-9517 40 Public Sq. Mount Vernon, OH 43050-3241 United States Fire District 740-393-9515 200 W Gambier St. Mount Vernon, OH 43050-3241 United States Town Clerk 740-393-9517 40 Public Sq. Mount Vernon, OH 43050-3241 United States Water 740-397-3707 3 North Gay St. Mount Vernon, OH 43050-3241 United States Sewer 740-397-3707 3 North Gay St. Mount Vernon, OH 43050-3241 United States Tax Collector 740-397-5893 3 North Gay St. Mount Vernon, OH 43050-3241 United States Code Enforcement 740-393-9517 40 Public Sq. Mount Vernon, 43050-3241 United States Town Hall Hours Monday - Friday: 8:00 A.M. - 4:00 P.M. County Knox