Welcome
We’re Old Second because you’re first.
We are not the bank who we are without you. For more than 150 years, we’ve grown our business by helping our customers grow first. We’ve built our reputation by building up the individuals and businesses in our communities. We design our products and services with your unique needs in mind and your best interests at heart. Much has changed since our doors opened in 1871, but one thing never will. At Old Second, you’re first.
Love your home loan as much as your home.
Home Loans
Building business starts by believing in people.
Commercial Banking
Sign on to a
better way to bank.
Checking Accounts
Beware of Scams
Learn about the most common scams happening now.
We recommend verifying any unsolicited phone or text request related to your bank accounts with a known rep at your bank.
Pay easy with digital wallets.
Load your O2 Debit Mastercard® to popular digital wallets and enjoy conveniences like:
- Quick pay in apps
- Touchless pay options (on compatible devices)
- Track transaction history in-app
Make your money grow.
Get a higher rate of return with our 6 month, 8 or 11 month CDs. Just $1,000 minimum to open.
*APY (Annual Percentage Yield) and interest rate effective 2/27/2025 and subject to change without notice. Must be opened with new money, not already on deposit with Old Second National Bank. Minimum balance to open and obtain APY is $1,000. Maximum deposit is $1,000,000 per tax ID. Money must remain on deposit for full 6 month, 8 month, or 11 month term to receive the stated APY. A penalty may be imposed for early withdrawal. Fees could reduce earnings on the account. CD will automatically renew for a 6 month, 8 month, or 11 month fixed term at the rates and terms then in effect. 6 month, 8 month, and 11 month CDs not available for IRAs. Offer subject to change without notice.
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