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First Security Bank


First Security Bank is Growing!

On July 22nd, Rocky Mountain Bank in Bozeman will become First Security Bank.

Say 'Yes' to Paperless

Make the switch to online eStatements today.
It's easy, safe, and more secure.

Got 5? We'll Give You $10

Open a personal checking account online in as little as five minutes
and we'll deposit $10 into your new account.

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Helpful tools and news just for you

What is Check Washing?

A very specific type of fraud is on the rise. Learn what Check Washing is and how to protect yourself from becoming a victim.
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Totally Free Checking

Accounts that fit your lifestyle! From FREE, to Easy Interest or 50+, we have the checking account that's right for you--and your business! 
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Home Loans

Buying a home is a big deal. Applying for a home loan doesn't have to be. Apply here and we'll have you on your way home in just minutes with our experienced team of mortgage lenders
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Local Business Solutions

At First Security Bank, we focus on helping local businesses thrive in our community. From Commercial Loans, to Lines of Credit and Overdraft Protection, find out how we can help your business grow. Contact one of our lenders today.

Less Paperwork In Your Life?

Switching to eStatements is an easy way to help reduce paper waste. They’re free, secure, convenient and won’t find their way into a landfill. Plus, eStatements can be accessed anytime day or night, days before a paper statement would arrive in your mail.

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Financial Foundations

To promote lifelong financial literacy for our customers, we've teamed with the experts at Everfi to offer a brief, yet powerful interactive learning experience we call Financial Foundations.

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Latest News & Events

Check back here often for the latest bank news and local events.