Isabella Bank, Ithaca Branch Basic Info Reviews Routing Numbers Map & Direction Name: Isabella Bank, Ithaca Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 1402 East Center Ithaca, Michigan 48847 Gratiot County View other branches Phone: 989-875-5080 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer072403004YY072405167YN072406412YN072413968YN072414446YN From: To: