First Bank, Owensville Facility Basic Info Reviews Routing Numbers Map & Direction Name: First Bank, Owensville Facility Main Office: No Service: Full Service Brick and Mortar Office Location: 120 South First Street Owensville, Missouri 65066 Gasconade County View other branches Phone: 573-437-4121 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer063114946YN081005794YN081009428YY081205109YN081205455YN121137506YN122239131YN From: To: