Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| Washington State Bank | Washington, IA | 04-18-1932 | $601,122 | BK |
| ASCENTRA | Bettendorf, IA | 01-01-1950 | $595,989 | CU |
| Citizens State Bank | Monticello, IA | 03-11-1931 | $594,400 | BK |
| South Ottumwa Savings Bank | Ottumwa, IA | 01-01-1903 | $565,445 | BK |
| Central State Bank | State Center, IA | 01-01-1902 | $557,818 | BK |
| Connection Bank | Fort Madison, IA | 07-01-1854 | $540,910 | BK |
| First Security Bank and Trust Company | Charles City, IA | 07-14-1903 | $538,199 | BK |
| American Bank, National Association | Le Mars, IA | 01-01-1887 | $533,050 | BK |
| Peoples Bank | Clive, IA | 03-17-1917 | $529,640 | BK |
| The Shelby County State Bank | Harlan, IA | 08-02-1909 | $523,571 | BK |
| Iowa Trust & Savings Bank | Emmetsburg, IA | 07-01-1929 | $521,983 | BK |
| Ohnward Bank & Trust | Cascade, IA | 02-28-1903 | $499,085 | BK |
| Grinnell State Bank | Grinnell, IA | 10-25-1925 | $498,585 | BK |
| TruBank | Indianola, IA | 01-01-1883 | $494,589 | BK |
| Security State Bank | Sutherland, IA | 01-01-1931 | $492,270 | BK |