There are 35 FDIC-insured banks headquartered in Montana, holding $78.08B in combined assets and $63.87B in deposits, alongside 41 NCUA-insured credit unions. Every figure below comes from the most recent quarterly call report each institution filed with its regulator. Banks are ranked by total assets, which is the standard measure of institution size and the basis regulators use for peer grouping and for determining which capital rules apply.
Ranked by total assets. Branch counts are domestic offices. Click any institution for eight quarters of financial history, peer benchmarking against similarly sized banks, deposit market share by county, and leadership contacts.
| # | Bank | City | Assets | Deposits | Branches |
|---|---|---|---|---|---|
| 1 | Glacier Bank | Kalispell | $31.58B | $24.86B | 261 |
| 2 | First Interstate Bank | Billings | $25.79B | $21.73B | 274 |
| 3 | Stockman Bank of Montana | Miles City | $7.75B | $6.21B | 47 |
| 4 | Opportunity Bank of Montana | Helena | $2.12B | $1.81B | 30 |
| 5 | Independence Bank | Havre | $1.39B | $1.20B | 10 |
| 6 | The Yellowstone Bank | Laurel | $1.34B | $1.12B | 10 |
| 7 | TrailWest Bank | Lolo | $1.11B | $860.2M | 15 |
| 8 | Bank of Bridger, National Association | Bridger | $802.7M | $729.8M | 12 |
| 9 | Farmers State Bank | Victor | $790.3M | $664.3M | 11 |
| 10 | American Bank | Bozeman | $630.4M | $564.0M | 6 |
| 11 | First Montana Bank, Inc. | Missoula | $530.3M | $437.9M | 10 |
| 12 | Little Horn State Bank | Hardin | $412.6M | $347.5M | 3 |
| 13 | Bank of Montana | Missoula | $308.6M | $278.9M | 1 |
| 14 | Three Rivers Bank of Montana | Kalispell | $293.1M | $257.9M | 3 |
| 15 | Manhattan Bank | Manhattan | $287.1M | $252.7M | 4 |
| 16 | Bank of The Rockies | Helena | $277.4M | $229.5M | 7 |
| 17 | Madison Valley Bank | Ennis | $263.7M | $238.6M | 5 |
| 18 | Valley Bank of Kalispell | Kalispell | $218.1M | $198.6M | 3 |
| 19 | Valley Bank of Ronan | Ronan | $218.1M | $197.6M | 7 |
| 20 | The First State Bank of Malta | Malta | $189.7M | $164.9M | 1 |
| 21 | Eagle Bank | Polson | $179.5M | $157.7M | 1 |
| 22 | The First State Bank of Shelby | Shelby | $175.6M | $148.5M | 1 |
| 23 | First State Bank of Forsyth | Forsyth | $165.5M | $143.4M | 1 |
| 24 | The Bank of Baker | Baker | $160.9M | $142.2M | 1 |
| 25 | Freedom Bank | Columbia Falls | $157.3M | $138.8M | 1 |
| 26 | Citizens Bank & Trust Company | Big Timber | $155.4M | $127.2M | 2 |
| 27 | Pioneer State Bank | Deer Lodge | $133.5M | $100.5M | 2 |
| 28 | Bank of Bozeman | Bozeman | $108.4M | $96.4M | 1 |
| 29 | Garfield County Bank | Jordan | $108.0M | $90.6M | 2 |
| 30 | Ascent Bank | Helena | $104.1M | $92.4M | 2 |
| 31 | First Security Bank of Roundup | Roundup | $94.5M | $81.8M | 1 |
| 32 | Belt Valley Bank | Belt | $89.9M | $74.0M | 1 |
| 33 | First Security Bank of Deer Lodge | Deer Lodge | $81.1M | $72.5M | 1 |
| 34 | Peoples Bank of Deer Lodge | Deer Lodge | $50.8M | $45.8M | 1 |
| 35 | Davidson Trust Co. | Great Falls | $13.2M | $500,000 | 13 |
NCUA-insured credit unions headquartered in Montana, ranked by total assets, with member counts from 5300 call report filings.
| # | Credit union | City | Assets | Members |
|---|---|---|---|---|
| 1 | WHITEFISH CREDIT UNION ASSOCIATION | Whitefish | $2.11B | 64,277 |
| 2 | CLEARWATER | Missoula | $1.14B | 66,586 |
| 3 | ALTANA | Billings | $633.9M | 39,750 |
| 4 | VALLEY FINANCIAL | Billings | $573.6M | 38,323 |
| 5 | ROCKY MOUNTAIN | Helena | $419.5M | 24,538 |
| 6 | PARK SIDE FINANCIAL | Whitefish | $378.7M | 30,155 |
| 7 | MONTANA | Great Falls | $351.8M | 26,100 |
| 8 | INTREPID | Helena | $309.6M | 18,666 |
| 9 | BILLINGS | Billings | $217.5M | 12,985 |
| 10 | 1ST LIBERTY | Great Falls | $215.8M | 14,501 |
| 11 | SOUTHWEST MONTANA COMMUNITY | Anaconda | $206.7M | 11,651 |
| 12 | SKY | Livingston | $199.7M | 12,666 |
| 13 | LINCOLN COUNTY | Libby | $177.7M | 5,687 |
| 14 | RUSSELL COUNTRY | Great Falls | $130.1M | 9,873 |
| 15 | GRASSLANDS | CIRCLE | $130.0M | 3,865 |
| 16 | FERGUS | Lewistown | $120.0M | 6,467 |
| 17 | RICHLAND | Sidney | $113.1M | 4,872 |
| 18 | DANIELS-SHERIDAN | SCOBEY | $89.5M | 3,173 |
| 19 | RAVALLI COUNTY | Hamilton | $84.9M | 6,118 |
| 20 | RIMROCK | BILLINGS | $61.2M | 3,343 |
| 21 | VOCAL | HELENA | $51.5M | 4,368 |
| 22 | COMMUNITY 1ST | Miles City | $41.6M | 3,895 |
| 23 | BADLANDS | Glendive | $39.4M | 2,190 |
| 24 | BUTTE COMMUNITY | Butte | $35.1M | 2,755 |
| 25 | MONTANA EDUCATORS' | Missoula | $34.3M | 1,678 |
| 26 | NORTHWESTERN ENERGY EMPLOYEES | BUTTE | $33.8M | 2,892 |
| 27 | MILE HIGH | BUTTE | $28.3M | 1,722 |
| 28 | GLENDIVE BN | GLENDIVE | $27.2M | 1,642 |
| 29 | SEG | LAUREL | $25.3M | 1,987 |
| 30 | MOUNTAIN WEST | Butte | $22.0M | 2,956 |
| 31 | WOLF POINT | Wolf Point | $21.2M | 3,235 |
| 32 | BITTERROOT COMMUNITY | DARBY | $18.8M | 2,148 |
| 33 | THE FAMILY FIRST | Great Falls | $17.9M | 1,779 |
| 34 | FORT PECK COMMUNITY | Fort Peck | $14.6M | 1,183 |
| 35 | DEER LODGE COUNTY SCHOOL EMP | Anaconda | $9.3M | 479 |
| 36 | ST. PATS EMPLOYEES | Missoula | $5.5M | 658 |
| 37 | M D U EMPLOYEES | Glendive | $4.1M | 485 |
| 38 | THE MORNING STAR | Lame Deer | $2.9M | 2,344 |
| 39 | TRICOUNTY | Harlowton | $1.8M | 228 |
| 40 | FROID | FROID | $1.2M | 165 |
| 41 | NORTHERN MONTANA HOSPITAL | Havre | $1.1M | 193 |
Deposit market share is measured at the county level from the FDIC Summary of Deposits, an annual branch-level filing as of each June 30. County data shows which institutions actually hold balances in a given market and how concentrated that market is — a question state-level totals cannot answer, because a bank can be small statewide and dominant in its home county.
Vault republishes public FDIC and NCUA filings without modification. Bank figures come from quarterly call reports; credit union figures from NCUA 5300 filings; branch and deposit market share from the FDIC Summary of Deposits. Data is free to access and free to cite, with no login or paywall. The same data is available to AI agents through a public Model Context Protocol server at vaultbot.ai/mcp.