| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Marion County State Bank | Bank | 5 | $546.6M | 43.56% |
| 2 | Leighton State Bank | Bank | 2 | $165.9M | 13.22% |
| 3 | Wells Fargo Bank, National Association | Bank | 1 | $117.2M | 9.34% |
| 4 | U.S. Bank National Association | Bank | 1 | $87.5M | 6.97% |
| 5 | Community 1St Credit Union | Credit union | 2 | $81.8M* | 6.52% |
| 6 | Peoples Savings Bank | Bank | 2 | $68.5M | 5.46% |
| 7 | Nicolet National Bank | Bank | 2 | $60.5M | 4.82% |
| 8 | Bank Iowa | Bank | 1 | $44.0M | 3.50% |
| 9 | Twin Cedars Bank | Bank | 1 | $34.7M | 2.77% |
| 10 | Washington State Bank | Bank | 1 | $24.3M | 1.93% |
| 1 more institutions, year-over-year share and branch changes with Pro →$29/mo, cancel any time. | |||||
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $1.25B | 11 | 19 | Marion County State Bank | 43.6% | 2,331 |
| 2025 | $1.22B | 11 | 19 | Marion County State Bank | 45.1% | 2,442 |
| 2024 | $1.18B | 10 | 18 | Marion County State Bank | 46.6% | 2,594 |
| 2023 | $1.16B | 10 | 17 | Marion County State Bank | 47.0% | 2,631 |
| 2022 | $1.21B | 9 | 16 | Marion County State Bank | 49.5% | 2,841 |
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.