Join our mailing list to receive OSB news on events, services and offers.
Join our Mailing List!

Security. Community. History.

Discover Your Banking Advantage.

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!


Sign up for Online Banking and get easy, free, secure paperless statements delivered directly to your email inbox.

Welcome to OSB


Important Announcement!

**Ottawa Savings Bank has acquired Twin Oaks Savings Bank**

Twin Oaks has become part of the Ottawa Savings family.

As of December 31, 2014, the merger of Ottawa Savings Bank and Twin Oaks Savings Bank has been completed. Jon Kranov, President and Chief Executive Officer of Ottawa Savings Bank stated "We believe that this transaction is in the best interests of Ottawa Savings Bancorp's shareholders.  We are also delighted to welcome Twin Oaks' depositors and borrowers to the Ottawa Savings family and to provide Ottawa Savings' legacy depositors and borrowers with two new branch offices.  We are confident that Twin Oaks customers' will enjoy and benefit from the added services that Ottawa Savings offers its customers."  Craig Hepner, former President and Chief Executive Officer of Twin Oaks Savings Bank, will serve as Chief Operation Officer of the Company and the Bank, added, "We are excited that Twin Oaks' customers will now be part of a larger, stronger bank with a long history of great customer service."


Click here for our Privacy statement