MidWestOne Bank holds $5.4B in deposits across 29 counties in 8 ranked markets and 4 states. Its deposit footprint is concentrated: the top three counties (Johnson County, Dubuque County, Denver County) hold 45% of its deposits, and Iowa accounts for 66% of the total. It ranks among the three largest institutions in 9 of the 29 counties where it operates.
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Data as of June 30, 2025 (FDIC Summary of Deposits)
| County | Deposits | County’s % of Bank’s Deposits | Bank’s % of County Deposits | Branches | |
|---|---|---|---|---|---|
| 1. | Johnson County, IA | $1.1B | 21.3% | 23.5% | 7 |
| 2. | Dubuque County, IA | $854M | 15.8% | 25.0% | 7 |
| 3. | Denver County, CO | $414M | 7.7% | 0.8% | 3 |
| 4. | Muscatine County, IA | $403M | 7.5% | 33.5% | 4 |
| 5. | Washington County, MN | $244M | 4.5% | 3.7% | 2 |
| 6. | Mahaska County, IA | $233M | 4.3% | 39.7% | 2 |
| 7. | Jefferson County, IA | $206M | 3.8% | 31.6% | 1 |
| 8. | Grant County, WI | $188M | 3.5% | 12.2% | 4 |
| 9. | Polk County, WI | $188M | 3.5% | 25.2% | 2 |
| 10. | Hennepin County, MN | $164M | 3.0% | 0.1% | 3 |
| 11. | Anoka County, MN | $130M | 2.4% | 2.1% | 2 |
| 12. | Keokuk County, IA | $112M | 2.1% | 28.8% | 2 |
| 13. | Des Moines County, IA | $110M | 2.0% | 7.4% | 1 |
| 14. | Chisago County, MN | $104M | 1.9% | 13.7% | 1 |
| 15. | Dakota County, MN | $100M | 1.9% | 1.0% | 1 |
| 16. | Wright County, MN | $94M | 1.7% | 3.2% | 1 |
| 17. | St. Croix County, WI | $86M | 1.6% | 4.1% | 1 |
| 18. | Benton County, IA | $83M | 1.5% | 10.5% | 1 |
| 19. | Black Hawk County, IA | $76M | 1.4% | 2.7% | 2 |
| 20. | Grundy County, IA | $69M | 1.3% | 6.7% | 1 |
| 21. | Ramsey County, MN | $68M | 1.3% | 0.1% | 1 |
| 22. | Marion County, IA | $65M | 1.2% | 5.7% | 2 |
| 23. | Dallas County, IA | $53M | 1.0% | 2.2% | 2 |
| 24. | Butler County, IA | $51M | 1.0% | 8.1% | 1 |
| 25. | Sherburne County, MN | $50M | 0.9% | 3.2% | 1 |
| 26. | Marshall County, IA | $42M | 0.8% | 2.9% | 1 |
| 27. | Lee County, IA | $35M | 0.6% | 2.6% | 1 |
| 28. | Linn County, IA | $21M | 0.4% | 0.3% | 1 |
| 29. | Polk County, IA | $6M | 0.1% | 0.0% | 1 |
Deposits are as reported to the FDIC at branch level, June 30, 2025, and are nominal. “County’s % of Bank’s Deposits” is this county’s share of the institution’s total deposits; “Bank’s % of County Deposits” is this institution’s deposits as a percent of all deposits booked in that county. Counties within a Combined or Metropolitan Statistical Area link to their full profile; other counties are shown for completeness.
All 293 markets and the 1,533 counties within a CSA or MSA are covered in the Market Intelligence resource. See the methodology for how each figure is built and when to expect updates.