| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | First Iowa State Bank | Bank | 2 | $190.2M | 60.23% |
| 2 | South Ottumwa Savings Bank | Bank | 2 | $75.3M | 23.85% |
| 3 | Community 1St Credit Union | Credit union | 1 | $40.9M* | 12.95% |
| 4 | Twin Cedars Bank | Bank | 1 | $9.4M | 2.98% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $315.7M | 4 | 6 | First Iowa State Bank | 60.2% | 4,373 |
| 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 | $288.6M | 4 | 6 | First Iowa State Bank | 54.2% | 3,995 |
| 2022 | $296.7M | 4 | 6 | First Iowa State Bank | 53.9% | 4,005 |
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.