St. Martin Bank and Trust Company, Johnston Street Branch Basic Info Reviews Routing Numbers Map & Direction Name: St. Martin Bank and Trust Company, Johnston Street Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 2810 Johnston Street Lafayette, Louisiana 70503 Lafayette County View other branches Phone: 337-234-4994 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer065200926YY065201446YN065204841YN From: To: