Westamerica Bank, Lake Isabella Branch Basic Info Reviews Routing Numbers Map & Direction Name: Westamerica Bank, Lake Isabella Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 6100 Lake Isabella Boulevard Lake Isabella, California 93240 Kern County View other branches Phone: 760-379-2691 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer121137001YN121140218YY121141000YN121141615YN From: To: