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Respected and Recommended Since 1871

Discover Your Banking Advantage


Join the OSB Staff and support Freezin’ for a Reezin’ to help support the local Community Food Basket to feed families!  OSB will be collecting non-perishable food for the 500 pound challenge through December 11th!  Stop by and drop off your donation.


Also, Beginning November 20th thru December 12th, Twin Oaks Elves are banking on you!  Get in the mood and donate some food!  All proceeds benefit Marseilles food pantry!

At Ottawa Savings Bank we promise to provide you with service second to none. We have a rich history and a fresh approach to security so you can bank with confidence. We are your friends, your partner, your service provider -
We are your neighborhood bank.

Featured Services


Gen Gold®

Save money on products and services you use everyday like groceries, prescriptions, dining, entertainment and much more!

Mobile Banking

With Mobile Banking you can check account balances, transfer money, and pay your bills right from the palm of your hand!

Mortgage Application

Ottawa Savings Bank makes it easy to apply for your mortgage online so you can quickly get the money you need!


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Welcome to OSB

To All of the wonderful customers of Ottawa Savings Bank and Twin Oaks Savings Bank.

We would like to thank you for your patience during our recent conversion!  We truly appreciate all of our customers.