Since 1918, we've been assisting our friends and neighbors with their financial needs. With almost 90 years of experience under our belt, we think we've pretty much perfected the art of community banking at its best. From traveler's checks to Money Market Acounts,from debit cards to agricultural loans, from our Premier Club for seniors to our Cashus Kids Club.. we're here for YOU.

We've remained responsive to the needs of our communities, and now have six convenient locations to serve you: Ixonia, Dousman, Oconomowoc, Lakes Plaza, Watertown East and Watertown South.

Online, on the phone, or in person.. We're ready to assist you with whatever you need.

Introducing Business Online Banking

You now have the ability to bank with us from your office, or wherever you need to be. Learn more... 

New Security Requirements For Online Banking

Secure Image multifactor authentication is required for all Online Banking customers. Learn more... 

• To report a lost or stolen ISB ATM or Debit Card, please call 1-800-383-8000.
• To report a lost or stolen VISA Credit Card, please call 1-800-558-3424.

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