Stockman Bank of Montana, Lewistown Branch Basic Info Reviews Routing Numbers Map & Direction Name: Stockman Bank of Montana, Lewistown Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 1716 West Main Street Lewistown, Montana 59457 Fergus County View other branches Phone: 406-538-3301 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer092902446YN092904570YN092905249YY From: To: