Serving Montanans since 1919 - Find Us

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Open 24/7 - Mobile Banking

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

Fraud Defender

ID Theft Protection with credit monitoring services, resolution assistance, and expense reimbursement.  Choose the monthly package that's right for you.

April is Community Banking Month

Thank you for supporting your locally-owned community bank! Proudly putting local deposits to work in Montana since 1919.

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.

Non-Profits

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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.