Royal Banks of Missouri, St. Charles Branch Basic Info Reviews Routing Numbers Map & Direction Name: Royal Banks of Missouri, St. Charles Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 1 Westbury Square Saint Charles, Missouri 63301 St. Charles County View other branches Phone: 636-724-2100 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer081001439YY081018833YN From: To: