Opportunity Bank of Montana holds $1.8B in deposits across 16 counties in 5 ranked markets and 1 state. Its deposit footprint is concentrated: the top three counties (Lewis And Clark County, Gallatin County, Roosevelt County) hold 44% of its deposits. It ranks among the three largest institutions in 8 of the 16 counties where it operates.
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Data as of June 30, 2025 (FDIC Summary of Deposits)
| County | Deposits | County’s % of Bank’s Deposits | Bank’s % of County Deposits | Branches | |
|---|---|---|---|---|---|
| 1. | Lewis And Clark County, MT | $351M | 20.0% | 14.7% | 4 |
| 2. | Gallatin County, MT | $240M | 13.7% | 4.8% | 3 |
| 3. | Roosevelt County, MT | $183M | 10.4% | 54.0% | 3 |
| 4. | Valley County, MT | $172M | 9.8% | 52.0% | 2 |
| 5. | Silver Bow County, MT | $118M | 6.7% | 12.6% | 1 |
| 6. | Broadwater County, MT | $114M | 6.5% | 100.0% | 1 |
| 7. | Yellowstone County, MT | $110M | 6.3% | 1.5% | 3 |
| 8. | Madison County, MT | $103M | 5.9% | 36.0% | 2 |
| 9. | Sweet Grass County, MT | $70M | 4.0% | 41.4% | 1 |
| 10. | Missoula County, MT | $65M | 3.7% | 1.8% | 2 |
| 11. | Park County, MT | $59M | 3.3% | 10.1% | 1 |
| 12. | Cascade County, MT | $46M | 2.6% | 2.2% | 1 |
| 13. | Ravalli County, MT | $42M | 2.4% | 3.3% | 1 |
| 14. | Teton County, MT | $40M | 2.3% | 19.6% | 2 |
| 15. | Fergus County, MT | $25M | 1.4% | 6.4% | 2 |
| 16. | Rosebud County, MT | $14M | 0.8% | 4.8% | 1 |
Deposits are as reported to the FDIC at branch level, June 30, 2025, and are nominal. “County’s % of Bank’s Deposits” is this county’s share of the institution’s total deposits; “Bank’s % of County Deposits” is this institution’s deposits as a percent of all deposits booked in that county. Counties within a Combined or Metropolitan Statistical Area link to their full profile; other counties are shown for completeness.
All 293 markets and the 1,533 counties within a CSA or MSA are covered in the Market Intelligence resource. See the methodology for how each figure is built and when to expect updates.