Old National Bank Online Banking Old National Bank is a regional bank first founded in 1834 in Evansville, Indiana. Now, it has over 200 banking centers and is considered as the largest holding company headquartered in Indiana. It is listed in the Top 100 US Banking Companies. Customer Service Telephone 1(800) 731-2265 Online Banking Login How to Log In 1. Go to Old National Bank’s homepage. 2. Enter your user ID and password. 3. Click “Log In.” How to Enroll…