1st Source Bank, Walkerton Branch Basic Info Reviews Routing Numbers Map & Direction Name: 1st Source Bank, Walkerton Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 411 Illinois Street Walkerton, Indiana 46574 St Joseph County View other branches Phone: 574-586-3131 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer071202756YY071212128YY From: To: