Westamerica Bank, Yountville Branch Basic Info Reviews Routing Numbers Map & Direction Name: Westamerica Bank, Yountville Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 6470 Washington Street Yountville, California 94599 Napa County View other branches Phone: 707-944-4422 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer121137001YN121140218YY121141000YN121141615YN From: To:
