We have collected answers to the most frequently asked questions for you to refer to. But if you do not find what you are looking for here, or need additional information, do not hesitate to contact us or give us a call at 877-866-0202.


Where do I find the Bank's ABA/routing number?
You can find ABA/routing numbers in the lower left of your check.  Old Second's ABA/routing number is 071900760. See the diagram below for more information.

Check diagram
How do I reorder new checks?
Click here to order checks.
How do I set up direct deposit to my Old Second account?
Generally, you will need to provide your employer with the following: Old Second's ABA/routing number: 071900760, the account number to which you wish to make the deposit, the account type (eg. checking, savings). Consult your employer's human resources department for their full requirements.
Can I manage my checking account with a mobile device?
Yes. Download the O2 Mobile Banking app here.