1st Source Bank, Centre Ave. Branch Basic Info Reviews Routing Numbers Map & Direction Name: 1st Source Bank, Centre Ave. Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 2381 West Centre Ave. Portage, Michigan 49024 Kalamazoo County View other branches Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer071202756YY071212128YY From: To: