First National Bank-Mt Vernon Address: 306 State Highway 37 S, Mt Vernon, TX 75457 Phone: (903) 537-2201 Banks Other Businesses: Guaranty Bank & Trust at 304 Texas Highway 37, Mt Vernon, TX 75457 First National Bank at 306 Texas Highway 37, Mt Vernon, TX 75457 Texas American Bank at 602 Interstate 30 W, Mt Vernon, TX 75457 Prosperity Bank at 539 Interstate 30 W, Mt Vernon, TX 75457