First Interstate Bank

About Us

Making Life Great in Yankton
We’ve been Making Life Great for our customers and communities for over 80 years. Founded in 1935, Great Western Bank began as a small-town bank. Today, we are a leading, full-service regional bank with over 170 branches throughout nine states, including one great banking location in Yankton, South Dakota. Our banking model seeks to balance the best of being a “big enough & small enough” bank, providing capabilities typical of a much larger bank, with a customer-focused culture usually associated with smaller banks.

Who We Are
We’re local hometown bankers, empowered to make fast decisions so you can enjoy the best of both smaller and bigger. We have the convenience of a bigger bank but we still handle your needs like a smaller one. We pride ourselves in doing the right thing, putting the customer first, getting the basics right and being authentic and respectful. We focus on the details and put you first.

We also know banking has evolved over the years which is why we offer convenient tools like mobile banking and online banking so you can bank on your own terms. Our digital platform provides flexibility, reliability and control to manage your finances anytime from anywhere. Plus, we have options that fit your life such as free checking accounts, basic savings accounts, business banking solutions and much more.