Or by the first letter of a Bank Name
| Headquarters | Date Established | Assets (1000s) | Type | |
|---|---|---|---|---|
| Guthrie County State Bank | Panora, IA | 10-17-1931 | $266,529 | BK |
| Pioneer Bank | Sergeant Bluff, IA | 01-01-1907 | $264,895 | BK |
| Security Trust & Savings Bank | Storm Lake, IA | 01-01-1908 | $264,200 | BK |
| Leighton State Bank | Pella, IA | 07-14-1911 | $261,414 | BK |
| MEMBERS1ST COMMUNITY | Marshalltown, IA | 01-01-1964 | $260,872 | CU |
| Cherokee State Bank | Cherokee, IA | 10-08-1888 | $256,586 | BK |
| Success Bank | Bloomfield, IA | 01-01-1900 | $255,701 | BK |
| Farmers Savings Bank | Colesburg, IA | 01-01-1907 | $255,508 | BK |
| Iowa State Savings Bank | Creston, IA | 01-01-1883 | $254,682 | BK |
| The Citizens First National Bank of Storm Lake | Storm Lake, IA | 02-01-1902 | $250,704 | BK |
| First Trust and Savings Bank | Wheatland, IA | 01-01-1905 | $249,281 | BK |
| Northwest Bank & Trust Company | Davenport, IA | 07-07-1941 | $247,742 | BK |
| Iowa State Bank and Trust Company of Fairfield, Iowa | Fairfield, IA | 05-19-1934 | $245,086 | BK |
| DeWitt Bank & Trust Co. | Dewitt, IA | 06-15-1933 | $243,108 | BK |
| THE FAMILY | Davenport, IA | 01-01-1935 | $242,059 | CU |