Landmark National Bank, Great Bend Branch Basic Info Reviews Routing Numbers Map & Direction Name: Landmark National Bank, Great Bend Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 1623 Main Street Great Bend, Kansas 67530 Barton County View other branches Phone: 620-792-2196 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer101100566YN101101248YN101104944YN301170642YN301171007YY301171120YN From: To: