Banks in Lewis and Clark County, Montana
25 active bank branches operated by 13 institutions, per FDIC records.
Active branches
25
Banks present
13
Deposits (2026)
$2.6B
Closings since 2020
12
6 openings
Largest banks by deposits in Lewis and Clark County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Glacier Bank | $639M | 24.5% | 4 |
| First Interstate Bank | $466M | 17.8% | 3 |
| Opportunity Bank of Montana | $369M | 14.1% | 4 |
| Stockman Bank of Montana | $342M | 13.1% | 3 |
| Wells Fargo | $310M | 11.9% | 2 |
| U.S. Bank | $264M | 10.1% | 1 |
| Ascent Bank | $92M | 3.5% | 2 |
| Citizens Alliance Bank | $43M | 1.6% | 1 |
| Chase Bank | $31M | 1.2% | 1 |
| Farmers State Bank | $26M | 1% | 1 |
Deposit location reflects the office to which deposits are reported and may not represent the residence of depositors.
Cities and towns
Transcribed from FDIC BankFind Suite active-location records and the annual Summary of Deposits. County assignment follows the FDIC branch record.