The First National Bank of Gilmer, Mount Vernon Branch Basic Info Reviews Routing Numbers Map & Direction Name: The First National Bank of Gilmer, Mount Vernon Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 824 Highway 37 South Mount Vernon, Texas 75457 Franklin County View other branches Phone: 903-537-2700 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer111905609YY111909825YN111914302YN From: To: