Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| Ohnward Bank & Trust | Cascade, IA | 02-28-1903 | $481,985 | BK |
| Security State Bank | Sutherland, IA | 01-01-1931 | $480,775 | BK |
| Raccoon Valley Bank | Perry, IA | 01-01-1927 | $472,860 | BK |
| Rolling Hills Bank & Trust | Atlantic, IA | 07-01-1876 | $472,271 | BK |
| NSB Bank | Mason City, IA | 01-01-1933 | $468,647 | BK |
| American Bank and Trust Company, National Association | Davenport, IA | 01-05-1999 | $467,874 | BK |
| Iowa State Bank | Algona, IA | 01-01-1928 | $467,700 | BK |
| Iowa State Bank | Des Moines, IA | 04-14-1941 | $466,961 | BK |
| Home State Bank | Jefferson, IA | 01-01-1934 | $460,238 | BK |
| Northeast Security Bank | Sumner, IA | 01-01-1888 | $448,989 | BK |
| Central State Bank | Coralville, IA | 11-12-1931 | $441,491 | BK |
| FreedomBank | Elkader, IA | 01-01-1903 | $440,816 | BK |
| TS Bank | Treynor, IA | 06-01-1923 | $437,153 | BK |
| Maquoketa State Bank | Maquoketa, IA | 09-02-1958 | $433,686 | BK |
| Waukon State Bank | Waukon, IA | 01-01-1871 | $433,004 | BK |