Old National Bank, Delavan Branch Basic Info Reviews Routing Numbers Map & Direction Name: Old National Bank, Delavan Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 500 E Walworth Ave Delavan, Wisconsin 53115 Walworth County View other branches Phone: 262-728-3456 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer072413638YN072414271YN086300012YY275971087YY From: To: