Mercantile Bank of Michigan, Ithaca Branch Basic Info Reviews Routing Numbers Map & Direction Name: Mercantile Bank of Michigan, Ithaca Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 219 East Center Street Ithaca, Michigan 48847 Gratiot County View other branches Phone: 989-875-4107 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer072402665YY072403211YY072404650YY072404757YY072408892YN072413227YY072413816YY072413829YY072414022YY From: To: