First Security Bank Hamilton
- Branch Name:Hamilton
- Service Type:Full-Service, Office
- State & County:Montana - Ravalli
- City or Town:Hamilton
- Zip Code:59840
- Phone Number:406-363-3551406-363-3551
Branch Information
The First Security Bank Hamilton branch is one of the bank's 13 locations and has been serving the financial needs of their customers in Hamilton, Ravalli County, Montana since 1905. The Hamilton branch operates as a full-service, brick and mortar office and is located at 100 N. Main Street, Hamilton, MT 59840. You can can contact the branch by calling 406-363-3551 or by visiting the location during regular business hours for assistance with your banking needs, such as opening checking and savings accounts, applying for loans and managing financial transactions.
The routing number for First Security Bank Hamilton branch is 092901337. It is valid for Automated Clearing House ACH transactions, such as direct deposits and bill payments as well as wire transfers, which are used for real-time bank-to-bank transactions. We recommend that you contact the branch directly to verify this information before proceeding with any transactions.
Branch Hours
- ■ Monday:9:00am - 5:00pm
- ■ Tuesday:9:00am - 5:00pm
- ■ Wednesday:9:00am - 5:00pm
- ■ Thursday:9:00am - 5:00pm
- ■ Friday:9:00am - 5:00pm
- ■ Saturday:Closed
- ■ Sunday:Closed
First Security Bank Hamilton offers both lobby and drive-thru hours. This location is open Monday to Friday and closed on Saturdays and Sundays. The branch opens at 9:00am in the morning. Please be advised that this information reflects the standard opening and closing hours of First Security Bank and is subject to change. We recommend contacting the Hamilton branch prior to your visit to confirm its hours of operation and availability.
- ■ Monday:8:00am - 5:30pm
- ■ Tuesday:8:00am - 5:30pm
- ■ Wednesday:8:00am - 5:30pm
- ■ Thursday:8:00am - 5:30pm
- ■ Friday:8:00am - 6:00pm
- ■ Saturday:9:00am - 1:00pm
- ■ Sunday:Closed
Bank Information
- Bank Name:First Security Bank
- Bank Type:Federal Reserve Non-member Bank
- FDIC Insurance:Certificate #21010
- Routing Number:ACH & Wire - 092901337
- Online Banking:fsbmsla.com
- Branch Count:13 Offices in Montana


Branch Reviews & Complaints
I called the branch while having trouble accessing my online account. On July 18 2025, I was instructed to call the Kalispell branch. The customer service woman was very nice but could not solve the problem. She said someone from online banking would call within 2 business days. They did not. Today, July 28, I tried to go online again. To no avail as the message said they did not" recognize me" and instructed me to call the Missoula Office. The customer service lady was very nice and told me to log into fsbmla.com using my current ID and Password. Upon trying I received another we do not recognize you message and instructed to call the Missoula office.
I decided not to call Missoula but call the Hamilton Branch. So glad I did. Anthony answered my call and was completely capable of answering my questions and making sure I had access to my online account. He was polite and patient as I had to follow all the online steps to creating a new password and security questions. He informed me that there had been changes made to the online system which required me to go through these extra steps. I am very pleased with the help I received today.
I must say that I have always received excellent help from the friendly staff whether it was starting a new account or having transactions at the teller window. Thank you, Janelli C.
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