GNB provides banking, lending and trust services to personal and business clients.

GNB Bank proudly serves communities in Grundy, Hardin, Franklin, Delawarw and Story counties in Iowa. See us for your banking needs!

Visit GNB Bank's offices in Ackley, Conrad, Geneva, Grundy Center, Iowa Falls, Manchester, Marshalltown and Story City.

Stay on top of your finances with Online Banking from GNB Bank. Check balances, transfer funds and more whenever you need to day or night!

Manage your GNB accounts from home, work or wherever you have a computer and internet access. Best of all, it’s free with all of our deposit accounts and is easy for anyone to use!

GNB provides real-time Online Banking, so you will see the results of overnight processing, as well as deposits or withdrawals posted to your account throughout the day.

Accounts to Match Your Lifestyle From rewards and interest to simple or value-added, our checking options are differentiated enough for you to find an account that best suits your life and financial …

Life is busy, so you don’t always have the time to stop by your GNB Bank to bank or deposit checks. With Mobile Banking and Mobile Deposit, you can bank when and where it’s convenient for you!

View the location details and hours of operation for GNB Bank's branch in Marshalltown.

View the location details and hours of operation for the Story City branch office of GNB Bank.