Clear Lake Bank and Trust Company, Mason City Branch Basic Info Reviews Routing Numbers Map & Direction Name: Clear Lake Bank and Trust Company, Mason City Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 425 Tiffany Drive Mason City, Iowa 50401 Cerro Gordo County View other branches Phone: 641-423-7121 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer073904036YY073922979YN From: To: