Old National Bank, South 27th Street Branch Basic Info Reviews Routing Numbers Map & Direction Name: Old National Bank, South 27th Street Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 5101 South 27th Street Greenfield, Wisconsin 53221 Milwaukee County View other branches Phone: 414-325-7312 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer072413638YN072414271YN086300012YY275971087YY From: To: