Skip Navigation Download Acrobat Reader 5.0 or higher to view PDF files.

First Security Bank

Our new mobile app is now available! Click here to download!

Take the first steps to becoming a Change Maker for good.

Open a Totally Free Checking Account and a $10 token
to make a positive impact in our community.

First Security Bank yellow background image for online account opening promo.

Total Freedom

Totally Free Checking:
Anytime. Anywhere. Anywhy you need it.

Your New Online Banking Upgrade.

Say hello to a new and improved experience. 

Here for Life. 

Your new adventure starts here. 

It's time to make a bold move. Let our Home Loan specialists finance your dreams.

Conversions for Kids

Impacting families, one friend at a time with Friends of the Children-Montana. For every Griz 3rd down conversion, we’re donating to this local non-profit.

Learn how to grow your money.

Our free Financial Foundations course makes it easy for you to gain a solid understanding of key financial concepts. We are committed to helping you build a strong financial future.  
Swipe to See More

calculator icon

Financial Calculators

Tools to help you better understand your finances.

security lock icon

Fraud Protection

 Learn how to protect yourself from fraud with good habits.

calendar iconHoliday Schedule

While we try to be open as much as possible, we do close a few days out of the year.

Swipe to See More
photo of cowboy driving horses through a field on horseback

Financial Foundations for Adults

Employment Opportunities

Donation request form

With branches in Missoula, Hamilton, Corvallis, Stevensville, Thompson Fall and Plains, First Security Bank proudly serves MIssoula, Sanders and Ravalli Counties.