| First Interstate Bank - 2501 Central Avenue | 2501 Central Avenue406-255-6100 | 406-255-6100 |
| First Interstate Bank - 2850 Old Hardin Rd | 2850 Old Hardin Rd406-237-1800 | 406-237-1800 |
| First Interstate Bank - 302 North 31st Street | 302 North 31st Street406-255-5290 | 406-255-5290 |
| First Interstate Bank - 3199 Grand Avenue | 3199 Grand Avenue406-255-6090 | 406-255-6090 |
| First Interstate Bank - 401 North 31st Street | 401 North 31st Street406-255-5000 | 406-255-5000 |
| First Interstate Bank - 730 Main Street | 730 Main Street406-255-5800 | 406-255-5800 |
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