First Bank of Ohio, Mount Vernon Branch Basic Info Reviews Routing Numbers Map & Direction Name: First Bank of Ohio, Mount Vernon Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 115 West High Street Mount Vernon, Ohio 43050 Knox County View other branches Phone: 740-397-1045 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer041202540YN044202466YN From: To: