Westamerica Bank, Lafayette Branch Basic Info Reviews Routing Numbers Map & Direction Name: Westamerica Bank, Lafayette Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 3515 Mt. Diablo Boulevard Lafayette, California 94549 Contra Costa County View other branches Phone: 925-299-7716 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer121137001YN121140218YY121141000YN121141615YN From: To:
