Cornerstone State Bank, Le Sueur Branch Basic Info Reviews Routing Numbers Map & Direction Name: Cornerstone State Bank, Le Sueur Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 415 North Main St Le Sueur, Minnesota 56058 Le Sueur County View other branches Phone: 507-665-4200 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer091905059YY091908373YN From: To: