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First Security Bank

Horsepower for your 

home loan.

Protect your interest rate with our Extended Lock
financing with Float-Down options.*

Our business is keeping yours in the black.

Totally Free Business Checking. Totally a win.

There’s no ‘Silicon’ in our valley.


Here, your accounts are protected and safe.

You can bank on long-standing financial stability and security.

Here for Life. 

lady with suitcase standing by sign

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.

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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.  
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Financial Calculators

Tools to help you better understand your finances.

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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.

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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.