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First Security Bank

Our Southgate branch is closed due to a staffing shortage. Please use our Dearborn branch across the street during this time. If you need to access your safe deposit box, please call 406-728-3115. If you have Mortgage Loan inquiries, please call 406-329-1958. We apologize for the inconvenience. 

Chip in for change.

Help change a child's life. Every time you use your Visa Debit Card this November, we'll  donate to area non-profits that benefit our kids. 

Helpful tools and services just for you

My anywhy account.

Open an account online in minutes. 
Anytime. Anyplace, Anywhy.

The ride of your life.

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

Make the easy switch.

Find out how our five step switch kit makes it easy for you to move your accounts over to First Security Bank.
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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.