Old Second National Bank, Oswego Branch Basic Info Reviews Routing Numbers Map & Direction Name: Old Second National Bank, Oswego Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 1200 Douglas Road Oswego, Illinois 60543 Kendall County View other branches Phone: 877-866-0202 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer071900760YY071910187YY071916822YY071922887YY071926867YN From: To: