| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | First Iowa State Bank | Bank | 2 | $180.0M | 59.00% |
| 2 | South Ottumwa Savings Bank | Bank | 2 | $78.0M | 25.57% |
| 3 | Community 1St Credit Union | Credit union | 1 | $39.0M* | 12.77% |
| 4 | Twin Cedars Bank | Bank | 1 | $8.1M | 2.65% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2025 | $305.1M | 4 | 6 | First Iowa State Bank | 59.0% | 4,305 |
| 2024 | $288.2M | 4 | 6 | First Iowa State Bank | 55.9% | 4,115 |
| 2023 | $288.3M | 4 | 6 | First Iowa State Bank | 54.2% | 3,999 |
| 2022 | $296.4M | 4 | 6 | First Iowa State Bank | 54.0% | 4,009 |
Every institution above links to its profile — ratios, peer medians and this quarter’s change signals. Pro adds the full table, share movement and CSV export.