Westamerica Bank, Ignacio Branch Basic Info Reviews Routing Numbers Map & Direction Name: Westamerica Bank, Ignacio Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 300 Ignacio Boulevard Novato, California 94949 Marin County View other branches Phone: 415-883-0180 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer121137001YN121140218YY121141000YN121141615YN From: To: