| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Armstrong Bank | Bank | 4 | $393.5M | 24.13% |
| 2 | Firstar Bank | Bank | 3 | $329.1M | 20.19% |
| 3 | BOKF, National Association | Bank | 2 | $286.4M | 17.56% |
| 4 | BancFirst | Bank | 2 | $176.5M | 10.82% |
| 5 | Arvest Bank | Bank | 2 | $107.9M | 6.62% |
| 6 | Mabrey Bank | Bank | 2 | $100.2M | 6.15% |
| 7 | Ttcu Federal Credit Union | Credit union | 1 | $97.5M* | 5.98% |
| 8 | Communication Federal Credit Union | Credit union | 1 | $74.1M* | 4.54% |
| 9 | Muskogee Federal Credit Union | Credit union | 2 | $63.4M* | 3.89% |
| 10 | The City National Bank and Trust Company of Lawton, Oklahoma | Bank | 1 | $2.0M | 0.12% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2025 | $1.63B | 10 | 20 | Armstrong Bank | 24.1% | 1,568 |
| 2024 | $1.78B | 10 | 20 | Armstrong Bank | 24.8% | 1,678 |
| 2023 | $1.72B | 10 | 20 | Firstar Bank | 22.1% | 1,597 |
| 2022 | $1.67B | 9 | 19 | Armstrong Bank | 22.3% | 1,504 |
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