FDIC-insured bank
First Interstate Bank — Billings, MT
Bank headquartered in Billings, Montana, part of FIRST INTRST BANCSYSTEM.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 401 N 31st St Billings, MT 59101 |
| County | Yellowstone |
| Metro area | Billings, MT |
| Website | www.firstinterstatebank.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 1105 |
| Federal Reserve RSSD ID | 659855 |
| Status | Active |
| Charter class | SM (STATE) |
| Holding company | FIRST INTRST BANCSYSTEM |
| Domestic offices | 274 |
| Financials as of | June 30, 2026 |
How to find your First Interstate Bank 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.firstinterstatebank.com.
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Offices nearest to headquarters
| First Interstate Bank main office Billings, MT |
401 N 31st St, 59101 |
| Internet Bank Branch Billings, MT |
401 N 31st St, 59101 |
| Billings Downtown Drive-Up Branch Billings, MT |
302 N 31st St, 59101 |
| Billings Heights Branch Billings, MT |
730 Main St, 59105 |
| Billings West Branch Billings, MT |
2501 Central Ave, 59102 |
| Billings Grand Branch Billings, MT |
3199 Grand Ave, 59102 |
| Billings Lockwood Branch Billings, MT |
2850 Old Hardin Rd, 59101 |
| Billings Shiloh Branch Billings, MT |
830 Shiloh Crossing Blvd, 59102 |
| Billings 54Th & Grand Branch Billings, MT |
5405 Grand Ave, 59106 |
| Laurel Branch Laurel, MT |
401 Se 4th St, 59044 |
| Columbus Branch Columbus, MT |
36 North 9th Street, 59019 |
| Hardin Branch Hardin, MT |
1101 North Center Avenue, 59034 |
274 offices in total. Browse them by city through the state pages.
Where First Interstate Bank has offices
Cities with the most First Interstate Bank offices
Largest banks headquartered elsewhere in Montana
| Glacier Bank Kalispell | $31.58 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 |
| Farmers State Bank Victor | $790.33 million |
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