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Online Banking


1st Security Bank of Roundup

Commercial, Ag and Consumer Loans

First Security Bank makes all kinds of loans to all kinds of people. Stop in today at 401 Main Street in Roundup to see if we have a loan product to meet your needs.






Learn How to Manage

Your Finances

1st Security Bank of Roundup is partnering with Banzai! to help teach responsible financial management! Check out our new online courses!

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Personal and Business

Credit Cards

Life is easier when things fit. How about a credit card that fits your lifestyle? Credit cards are great tools for bringing convenience, value, and financial security to your everyday.

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Need Assistance?
Call us at (406) 323-1100


Personal & Commercial Lending

Money doesn’t grow on trees. Sometimes you need a little help to accomplish your goals. At 1st Security Bank, we’re proud to offer a number of personal and commercial loan options to help you live the life you want to live.

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Checking, Savings, and CD Accounts

We’ve listened to our customers and have put together a variety of accounts to meet your specific financial needs at your life stage. Come in and open an account and experience the customer service that sets us apart from the competition!

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Mobile Banking

Get Started

Not sure where to begin?

Our new website is helps you accomplish all of your banking needs. We will be with you every step of the way whether it’s opening up a new account or helping apply for a loan. Stop by or make an appointment with our friendly staff today!

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