Mercantile Bank of Michigan, Firstbank - West Michigan Bank Branch Basic Info Reviews Routing Numbers Map & Direction Name: Mercantile Bank of Michigan, Firstbank - West Michigan Bank Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 302 West Main Street Ionia, Michigan 48846 Ionia County View other branches Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer072402665YY072403211YY072404650YY072404757YY072408892YN072413227YY072413816YY072413829YY072414022YY From: To:
