Mahaska County, Iowa, a core county of the Des Moines-West Des Moines-Ames, IA market, holds $585M in deposits across 7 insured institutions and 9 branches. MidWestOne Bank is the largest deposit holder at 39.7% share. The top three institutions hold 78.3% of deposits, which places the county in the concentrated band. Deposits have grown 8.8% since 2020 while the branch count fell by 1. It produces $874M of output, ranking #1,231 of the 1,523 counties within a CSA or MSA by economic output.
Deposit trend
Branches: 10 in 2020 to 9 in 2025. Institutions: 7 to 7. Top-three share: 77.2% to 78.3%.
Leading institutions by deposits
| Institution | Deposits | Share | 5‑yr |
|---|---|---|---|
| MidWestOne Bank | $233M | 39.7% | -1% |
| Bank Iowa | $154M | 26.4% | +35% |
| TruBank | $72M | 12.2% | +8% |
| Great Southern Bank | $36M | 6.1% | -40% |
| Twin Cedars Bank | $34M | 5.9% | +132% |
| Leighton State Bank | $29M | 5.0% | +33% |
| First State Bank | $27M | 4.6% | no 2020 presence |
The 7 insured institutions with a branch presence in this county, as of June 30, 2025. Five-year change compares the same institution’s county deposits in 2020 and 2025. Institutions are tracked by FDIC certificate number, and where an institution acquired another bank, the acquired bank’s prior deposits are folded into the baseline so the change reflects the combined, continuing franchise rather than reading as new. Even so, a large gain can reflect acquisition rather than organic growth; “no 2020 presence” means neither the institution nor a bank it later absorbed reported deposits in this county that year.
Part of the Des Moines-West Des Moines-Ames market
Mahaska County is one of 10 counties that make up the Des Moines-West Des Moines-Ames, IA market, a Combined Statistical Area (ranked #53 of 293 U.S. markets by economic output). It produces 1.2% of the market’s output and holds 1.4% of its deposits.
| Measure | Mahaska County | Share of Des Moines-West Des Moines-Ames market |
|---|---|---|
| 2024 GDP | $874M | 1.2% |
| Deposits | $585M | 1.4% |
| Population | 21,880 | 2.3% |
View the full Des Moines-West Des Moines-Ames market profile →
Recruiting in Mahaska County
Deposits are held closely by the largest banks, which often means the bankers worth recruiting are inside a small number of institutions. Who holds the deposits, and how contested the market is, shapes both the runway for growth and the competition you would be recruiting against. We recruit commercial relationship managers, banking teams, and market leaders for banks building in markets like Mahaska County, on a retained basis.
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