FDIC-insured bank
First Security Bank of Roundup — Roundup, MT
Bank headquartered in Roundup, Montana, part of CENTRAL MONTANA BCORP.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 401 Main St Roundup, MT 59072 |
| County | Musselshell |
| Website | www.1stsecurityroundup.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 20479 |
| Federal Reserve RSSD ID | 625056 |
| Status | Active |
| Charter class | NM (STATE) |
| Holding company | CENTRAL MONTANA BCORP |
| Domestic offices | 1 |
| Financials as of | June 30, 2026 |
How to find your First Security Bank of Roundup routing number
FDIC does not publish ABA routing numbers, and many banks use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this bank, the "account details" screen in its online banking, or its official website at www.1stsecurityroundup.com.
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Offices nearest to headquarters
| First Security Bank Of Roundup main office Roundup, MT |
401 Main St, 59072 |
Where First Security Bank of Roundup has offices
Cities with the most First Security Bank of Roundup offices
Largest banks headquartered elsewhere in Montana
| Glacier Bank Kalispell | $31.58 billion |
| First Interstate Bank Billings | $25.79 billion |
| Stockman Bank of Montana Miles City | $7.75 billion |
| Opportunity Bank of Montana Helena | $2.12 billion |
| Independence Bank Havre | $1.39 billion |
| The Yellowstone Bank Laurel | $1.34 billion |
| TrailWest Bank Lolo | $1.11 billion |
| Bank of Bridger, National Association Bridger | $802.73 million |
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