Old Second National Bank – serving customers from 28 locations in Illinois.

Old Second National Bank Online Banking Services Info:

• Find Branch Locations and Hours
• Website –  www.oldsecond.com
• Old Second National Bank Login page
• Old Second National  Bank Enrollment page
• Customer Service Telephone – 877-866-0202
• Routing Number – 071900760
• Swift Code – not part of SWIFT network

Important Old Second National Bank Company Phone Numbers:

Customer Service Telephone: 877-866-0202

Report a Lost/Stolen Old Second National Bank Debit Card or Fraudulent Charges: 800-500-1044

Report a Lost/Stolen Old Second National Bank Credit Card or Fraudulent Charges:800-500-1044