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First Security Bank

FRAUD ALERT: If you receive a text from an account claiming to be us, do NOT click the link or respond to the message. If you have already done either of those things of have questions regarding a message you've received, please call us at 406-728-3115.

Temporary closure: Our Mullan branch is temporarily closed. We apologize for the inconvenience and will reopen as soon as possible.
In honor of those who served, our branches will be closed Monday, May 30th in observance of Memorial Day. We look forward to seeing you on Tuesday. 
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Bring someone closer to home.

This May, every time you use your Visa® Debit Card we'll contribute to area nonprofits that can open new doors to affordable housing

Here for Life. 

There's a rhythm to this routine. 

Banking creates big opportunities. This is. who we are. After 50 years, we're just getting started.

Join us

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We are searching for talent. 

Get the career you've been hoping for.
Join us at First Security Bank.

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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

First Security Bank proudly serves MIssoula, Sanders and Ravalli Counties.