Every FDIC-insured bank branch in Custer County, Oklahoma as of June 30, 2025. County land area: 989 square miles, 2.0 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| Oklahoma Bank and Trust Company | 4 | $166.0M |
| Bank of Hydro | 2 | $57.1M |
| The Bank of the West | 2 | $116.7M |
| Blue Sky Bank | 1 | $113.8M |
| First Bank and Trust Company | 1 | $46.6M |
| InterBank | 1 | $70.0M |
| BancFirst | 1 | $101.5M |
| Great Plains National Bank | 1 | $40.9M |
| First Summit Bank | 1 | $6.7M |
| Legacy Bank | 1 | $47.6M |
| MidFirst Bank | 1 | $117.6M |
| Southwest Bank of Weatherford | 1 | $67.0M |
| Bank of Western Oklahoma | 1 | $64.3M |
| First Bank of Thomas | 1 | $47.3M |
| BANK360 | 1 | $30.7M |