Sterling Federal Bank, F.S.B., 221 North Union Branch Basic Info Reviews Routing Numbers Map & Direction Name: Sterling Federal Bank, F.S.B., 221 North Union Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 221 N Union St Byron, Illinois 61010 Ogle County View other branches Phone: 815-234-7601 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer271173494YY271972679YN From: To: