Commercial Bank, Ithaca Branch Basic Info Reviews Routing Numbers Map & Direction Name: Commercial Bank, Ithaca Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 101 North Pine River Ithaca, Michigan 48847 Gratiot County View other branches Phone: 989-875-4144 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer072403554YY272471357YN From: To: