Serving Montanans since 1919 - Find Us

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Cards that Work for You

Credit cards for your personal and business needs!  First Security Bank customers can apply online for a Personal Platinum, Rewards, or Secured card.  Business card applications available at your local branch.

Show Your School Spirit

Choose a school logo debit card and we will donate $5 to that school!  Designs for public high schools in Bozeman, Belgrade, Fort Benton,  West Yellowstone, Three Forks, and Big Sky are available.

Open 24/7 - Mobile Banking

Deposit checks, pay bills, transfer it all wherever your adventures take you.  More details here, or contact an Account Specialist for more information.

Montana Home Loans

Success can mean a new home for your family, and we’re here to help.
Check Our Competitive Rates »

Small Business Lending

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Whether a commercial loan or real estate, or agriculture loan, First Security Bank's lending expertise and local loan decisions create a tailored solution for your business needs.

Personal Deposits

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Let’s face it, sometimes it is hard to save. That is why First Security Bank offers savings accounts, CDs, and IRAs with low minimum balances and competitive interest rates.


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First Security Bank is proud to support non-profit organizations through donations and volunteerism. Offering Non-profit regular checking, loans, and money market accounts.