| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | The Security National Bank of Sioux City, Iowa | Bank | 6 | $967.8M | 25.66% |
| 2 | Central Bank | Bank | 5 | $426.2M | 11.30% |
| 3 | Wells Fargo Bank, National Association | Bank | 3 | $395.4M | 10.48% |
| 4 | U.S. Bank National Association | Bank | 3 | $282.2M | 7.48% |
| 5 | Great Southern Bank | Bank | 5 | $280.9M | 7.45% |
| 6 | Primebank | Bank | 2 | $219.2M | 5.81% |
| 7 | Pioneer Bank | Bank | 3 | $201.1M | 5.33% |
| 8 | Siouxland Federal Credit Union | Credit union | 4 | $160.9M* | 4.27% |
| 9 | Northwest Bank | Bank | 1 | $112.9M | 2.99% |
| 10 | Telco Triad Community Credit Union | Credit union | 4 | $92.7M* | 2.46% |
| 15 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 |
|---|---|---|---|---|---|---|
| 2025 | $3.77B | 25 | 58 | The Security National Bank of Sioux City, Iowa | 25.7% | 1,128 |
| 2024 | $3.59B | 25 | 59 | The Security National Bank of Sioux City, Iowa | 24.2% | 1,074 |
| 2023 | $3.44B | 24 | 58 | The Security National Bank of Sioux City, Iowa | 24.8% | 1,110 |
| 2022 | $3.56B | 24 | 57 | The Security National Bank of Sioux City, Iowa | 26.7% | 1,169 |
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.