Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| Hardin County Savings Bank | Eldora, IA | 01-01-1868 | $402,273 | BK |
| The Clinton National Bank | Clinton, IA | 05-01-1865 | $396,417 | BK |
| First Iowa State Bank | Albia, IA | 05-12-1930 | $396,119 | BK |
| Iowa State Bank | Clarksville, IA | 01-01-1918 | $392,876 | BK |
| First State Bank | Lynnville, IA | 01-01-1912 | $384,245 | BK |
| The Libertyville Savings Bank | Fairfield, IA | 09-16-1901 | $384,129 | BK |
| PREMIER | Des Moines, IA | 01-01-1933 | $382,883 | CU |
| Earlham Savings Bank | West Des Moines, IA | 01-01-1931 | $382,508 | BK |
| Citizens First Bank | Clinton, IA | 03-14-2000 | $361,256 | BK |
| American State Bank | Osceola, IA | 04-23-1987 | $360,813 | BK |
| Premier Bank | Dubuque, IA | 10-13-1998 | $357,734 | BK |
| Glenwood State Bank | Glenwood, IA | 01-01-1899 | $352,857 | BK |
| Iowa State Bank and Trust Company of Fairfield, Iowa | Fairfield, IA | 05-19-1934 | $352,064 | BK |
| New Albin Savings Bank | New Albin, IA | 01-01-1898 | $350,557 | BK |
| Commercial Savings Bank | Carroll, IA | 01-01-1917 | $348,840 | BK |