All GRNB locations will be closed Monday, May 26th, in observance of Memorial Day. 

Contact Us

Have a question, concern, or just want to get the ball rolling on a new product or service?  Your message will be seen by senior level executives who will take action and respond within 1 business day.  If you need immediate assistance, please call us during normal business hours.  To report a lost or stolen debit card please call 1-800-417-8715

New Accounts: 630.580.1520
E-Banking: 630.580.1409
Loan Servicing: 630.580.1011

Business Hours: Monday – Friday 9 am to 5 pm (Central Standard Time)


Wheaton, IL – Main Office

Wheaton, IL – Corporate Office

Grand Ridge, IL – Branch

Miami/Fort Lauderdale – Regional Office

Tampa, FL – Regional Office

Michigan – Regional Office


For your protection, do NOT include your access ID, password, or Social Security Number in the form.