Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| Exchange Bank and Trust Company | Perry, OK | 02-20-1896 | $428,732 | BK |
| Anchor D Bank | Texhoma, OK | 02-23-1906 | $404,513 | BK |
| The Security National Bank of Enid | Enid, OK | 01-01-1907 | $400,374 | BK |
| FORT SILL | Lawton, OK | 01-01-1956 | $394,238 | CU |
| The Community State Bank | Poteau, OK | 10-19-1970 | $393,108 | BK |
| Security State Bank of Oklahoma | Wewoka, OK | 12-05-1911 | $388,240 | BK |
| McCurtain County National Bank | Broken Bow, OK | 04-23-1982 | $384,215 | BK |
| ALLEGIANCE | Oklahoma City, OK | 01-01-1963 | $372,470 | CU |
| ALLEGIANCE | OKLAHOMA CITY, OK | 01-01-1963 | $371,023 | CU |
| The Pauls Valley National Bank | Pauls Valley, OK | 01-01-1905 | $356,587 | BK |
| Sooner State Bank | Tuttle, OK | 01-01-1903 | $354,635 | BK |
| Frazer Bank | Altus, OK | 01-01-1902 | $354,251 | BK |
| Citizens Bank of Ada | Ada, OK | 02-20-1967 | $353,708 | BK |
| Cowboy Bank | Kremlin, OK | 05-01-1900 | $350,297 | BK |
| The First Security Bank | Beaver, OK | 01-16-1916 | $334,957 | BK |