Southern Michigan Bank & Trust, Constantine Branch Basic Info Reviews Routing Numbers Map & Direction Name: Southern Michigan Bank & Trust, Constantine Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 345 North Washington Constantine, Michigan 49042 St. Joseph County View other branches Phone: 269-435-8446 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer072402283YY072402610YY072414459YN From: To: